WO2020063843A1 - Communication method and apparatus - Google Patents

Abstract

The embodiment of the present application provides a communication method and apparatus. A first terminal device obtains a target codebook and encodes information according to the target codebook when determining to send information to a second terminal device through a side chain, and sends the encoded information to the second terminal device through a side chain, so as to realize diversity transmission of information required to be transmitted by the side chain between two terminal devices, thus improving the transmission reliability by enabling the second terminal device to obtain more independent fading signals of a same modulation symbol.

Description

Communication method and device

This application claims priority from a Chinese patent application filed on September 29, 2018 with the Chinese Patent Office, application number 201811145508.5, and application name "communication method and device", the entire contents of which are incorporated herein by reference.

Technical field

The present application relates to the field of communication technologies, and in particular, to a communication method and device.

Background technique

Currently, terminal devices can communicate in two ways. One is the PC5 method for direct communication between terminal devices, which is a side chain (SL) transmission at this time; the other is the air interface Uu method for communication through a base station.

In the prior art, in the PC5 mode of direct communication between terminal devices, two terminal devices implement side-chain transmission based on one antenna port. Specifically, the terminal device 1 sends information to the terminal device 2 through a side chain, and sends the information to the terminal device 2 through an antenna port. The terminal device 2 receives the information sent by the terminal device 1 through the side chain through the antenna port.

However, in the prior art, there is a problem that the reliability is low when the terminal devices communicate directly.

Summary of the Invention

The present application provides a communication method and device for improving transmission reliability.

In a first aspect, an embodiment of the present application provides a communication method applied to a first terminal device, where the first terminal device includes 4N antenna ports, and the 4N antenna ports are divided into 2N antenna port pairs, where N is A positive integer greater than 1, the method includes:

When the first terminal device determines to send information to the second terminal device through a side chain, it obtains a target codebook, where the target codebook is a codebook obtained according to a first matrix, and the first matrix is obtained according to a second matrix. A matrix for mapping consecutive 2N modulation symbols to each antenna port; wherein the second matrix is a 2N × 2N matrix with a rank equal to 2N, the second matrix includes 2N first vectors, and the 2N First vectors correspond one-to-one to the 2N antenna ports, the first matrix includes 4N second vectors, the 4N second vectors correspond one-to-one to the 4N antenna ports, each second The vector includes 2N elements, and every two second vectors correspond to a first vector;

The first terminal device encodes the information according to the target codebook, and sends the encoded information to the second terminal device through a side chain.

In the above solution, when it is determined by the first terminal device to send information to the second terminal device through the side chain, the target codebook is obtained and the information is encoded according to the target codebook, and the encoded information is sent to the second terminal device through the side chain. , The diversity transmission of information that needs side-chain transmission between two terminal devices can be realized, so that the second terminal device can obtain more independent fading signals of the same modulation symbol, thereby improving transmission reliability.

In a possible implementation design, the second matrix is a matrix obtained according to a third matrix and a fourth matrix;

The third matrix is a 2N × 2N matrix determined according to consecutive 2N modulation symbols;

The fourth matrix is a 2N × 2N matrix composed of 1 and -1 with a rank of 2N, and any two row vectors are orthogonal vectors.

In the above scheme, the fourth matrix is a 2N × 2N matrix composed of 1 and -1 with a rank of 2N and any two row vectors are orthogonal vectors, so that orthogonality between adjacent subcarriers can be achieved. .

In a possible implementation design, N is equal to 2, and the elements of any two column vectors of the third matrix are any two modulation symbols of four consecutive modulation symbols, and the other two column vectors of the third matrix are The element of is the conjugate of the other two modulation symbols among the four consecutive modulation symbols.

In the above solution, the elements of the other two column vectors of the third matrix are the conjugates of the other two modulation symbols in the four consecutive modulation symbols, and the phase can be rotated by 90 degrees, thereby ensuring the encoding codebook. Orthogonality, the receiving end can obtain the receiving gain through simple linear decoding, and realize the optimal performance of the linear receiver.

In a possible implementation design, N is equal to 2, and the third matrix includes any one of the following:

或

or

s _4i、s _4i+1、s _4i+2和s _4i+3表示4个连续的调制符号，*表示取共轭。 among them,

s _4i , s _{4i + 1} , s _{4i + 2} and s _{4i + 3} represent 4 consecutive modulation symbols, and * represents taking conjugate.

In a possible implementation design, the second matrix is a matrix obtained by adjusting a position of an element in a row vector in the fifth matrix, and each row and each column in the second matrix includes a continuous 2N Modulation symbols

Wherein, the element in the i-th row and j-th column of the third matrix is denoted as M1 _ij , and the element in the i-th row and j-th column of the fourth matrix is denoted as M2 _ij , then the element in the i-th row and j-th column of the fifth matrix is denoted M3 _ij and M3 _ij = M1 _ij × M2 _ij , or the elements in the i-th row and j-th column of the sixth matrix are represented as M4 _ij and M4 _ij = M1 _ij × M2 _ij , and the fifth matrix Any two rows in the sixth matrix are obtained by conjugate; i and j are integers of 1 to 2N.

In the above solution, the second matrix is a matrix obtained by adjusting positions of elements in a row vector in a fifth matrix, and each row and each column in the second matrix includes consecutive 2N modulation symbols, In this way, each antenna port pair contains all the modulation symbols, and the receiving end can complete the decoding as long as it receives the information of one antenna port pair. In this way, the codebook has better scalability and reduces the port with poor channel status. The resulting impact enables the receiving end to correctly decode even if it only receives information sent by some ports.

In addition, by using the fifth matrix as a matrix obtained by conjugating any two rows in the sixth matrix, the difference in data sent by each subcarrier can be further manufactured, so that the spreading gain is increased.

In a possible implementation design, the elements of any two row vectors of the third matrix are any two modulation symbols among the four consecutive modulation symbols, and the elements of the other two row vectors of the third matrix are The conjugate of the other two modulation symbols in the four consecutive modulation symbols is described.

In a possible implementation design, the third matrix includes any one of the following:

或

or

Among them, E = [1 1 1 1], s _4i , s _{4i + 1} , s _{4i + 2} and s _{4i + 3} represent 4 consecutive modulation symbols, i is a natural number starting from 1, and * represents conjugate.

In a possible implementation design, the second matrix is a matrix obtained by adjusting a position of an element in a column vector in a fifth matrix, and each row and each column in the second matrix includes a continuous 2N Modulation symbols

Wherein, the element in the i-th row and j-th column of the third matrix is denoted as M1 _ij , and the element in the i-th row and j-th column of the fourth matrix is denoted as M2 _ij , then the element in the i-th row and j-th column of the fifth matrix is denoted M3 _ij and M3 _ij = M1 _ij × M2 _ij , or the elements in the i-th row and j-th column of the sixth matrix are represented as M4 _ij and M4 _ij = M1 _ij × M2 _ij , and the fifth matrix Any two columns in the sixth matrix are obtained by conjugation; i and j are integers of 1 to 2N.

In the above solution, the second matrix is a matrix obtained by adjusting positions of elements in a column vector in a fifth matrix, and each row and each column in the second matrix includes consecutive 2N modulation symbols, In this way, each antenna port pair contains all the modulation symbols, and the receiving end can complete the decoding as long as it receives the information of one antenna port pair. In this way, the codebook has better scalability and reduces the port with poor channel status. The resulting impact enables the receiving end to correctly decode even if it only receives information sent by some ports.

In addition, by using the fifth matrix as a matrix obtained by conjugating any two columns in the sixth matrix, the difference in data sent by each subcarrier can be further manufactured, so that the spreading gain is increased.

In a possible implementation design, the m-th element of the first vector is represented as V1 _m , the m-th element of a second vector corresponding to the first vector is represented as V2 _m , and the first vector The mth element of the corresponding second vector is represented as V3 _m , where m is an integer from 1 to 2N, then when m is taken from the first subset of 1 to 2N, V2 _m = V1 _m and V3 _m = 0, When m takes the second subset of 1 to 2N, V2 _m = 0 and V3 _m = V1 _m ; wherein the intersection of the first subset and the second subset is an empty set, and the first subset The union of the set and the second subset is an integer of 1 to 2N, and the number of non-zero elements of the two second vectors corresponding to the first vector are both equal to N.

In the above scheme, when m takes the first subset of 1 to 2N, V2 _m = V1 _m and V3 _m = 0, and when m takes the second subset of 1 to 2N, V2 _m = 0 and V3 _m = V1 _m can reduce the correlation between subcarriers and improve the decoding recognizability. In addition, the number of non-zero elements of the two second vectors corresponding to the first vector are both equal to N, which can reduce the impact of frequency selective fading through data spreading and reduce Spreading reduces interference between ports and reduces decoding complexity.

In a second aspect, an embodiment of the present application provides a communication method applied to a second terminal device. The second terminal device includes 4N antenna ports, and the 4N antenna ports are divided into 2N antenna port pairs, where N is A positive integer greater than 1, the method includes:

When the second terminal device determines to receive information from the first terminal device through the side chain, it obtains a target codebook, where the target codebook is a codebook obtained according to a first matrix, and the first matrix is obtained according to a second matrix. Matrix for mapping consecutive 2N modulation symbols to each antenna port; wherein the second matrix is a 2N × 2N matrix having a rank equal to N, the second matrix includes N first vectors, and the N First vectors correspond one-to-one to the N antenna ports, the first matrix includes 2N second vectors, the 2N second vectors correspond one-to-one to the 2N antenna ports, each second The vector includes 2N elements, and every two second vectors correspond to a first vector;

The second terminal device demodulates information received from the first terminal device through a side chain according to the target codebook.

In the above solution, when it is determined by the second terminal device that the information is received from the first terminal device through the side chain, the target codebook is obtained and the information received from the first terminal device through the side chain is demodulated according to the target codebook. Diversity transmission of information requiring side-chain transmission between two terminal devices is achieved, so that the second terminal device can obtain more independent fading signals of the same modulation symbol, thereby improving transmission reliability.

In a possible implementation design, the second matrix is a matrix obtained according to a third matrix and a fourth matrix;

The third matrix is a 2N × 2N matrix determined according to consecutive 2N modulation symbols;

The fourth matrix is a 2N × 2N matrix composed of 1 and -1 with a rank of 2N, and any two row vectors are orthogonal vectors.

In a possible implementation design, N is equal to 2, and the elements of any two column vectors of the third matrix are any two modulation symbols of four consecutive modulation symbols, and the other two column vectors of the third matrix are The element of is the conjugate of the other two modulation symbols among the four consecutive modulation symbols.

In a possible implementation design, N is equal to 2, and the third matrix includes any one of the following:

或

or

s _4i、s _4i+1、s _4i+2和s _4i+3表示4个连续的调制符号，*表示取共轭。 among them,

s _4i , s _{4i + 1} , s _{4i + 2} and s _{4i + 3} represent 4 consecutive modulation symbols, and * represents taking conjugate.

In a possible implementation design, the second matrix is a matrix obtained by adjusting a position of an element in a row vector in the fifth matrix, and each row and each column in the second matrix includes a continuous 2N Modulation symbols

Wherein, the element in the i-th row and j-th column of the third matrix is denoted as M1 _ij , and the element in the i-th row and j-th column of the fourth matrix is denoted as M2 _ij , then the element in the i-th row and j-th column of the fifth matrix is denoted M3 _ij and M3 _ij = M1 _ij × M2 _ij , or the elements in the i-th row and j-th column of the sixth matrix are represented as M4 _ij and M4 _ij = M1 _ij × M2 _ij , and the fifth matrix Any two rows in the sixth matrix are obtained by conjugate; i and j are integers of 1 to 2N.

In a possible implementation design, N is equal to 2, and the elements of any two row vectors of the third matrix are any two modulation symbols of four consecutive modulation symbols, and the other two row vectors of the third matrix are The element of is the conjugate of the other two modulation symbols among the four consecutive modulation symbols.

In a possible implementation design, N is equal to 2, and the third matrix includes any one of the following:

或

or

Among them, E = [1 1 1 1], s _4i , s _{4i + 1} , s _{4i + 2} and s _{4i + 3} represent 4 consecutive modulation symbols, i is a natural number starting from 1, and * represents conjugate.

In a possible implementation design, the second matrix is a matrix obtained by adjusting a position of an element in a column vector in a fifth matrix, and each row and each column in the second matrix includes a continuous 2N Modulation symbols

Wherein, the element in the i-th row and j-th column of the third matrix is denoted as M1 _ij , and the element in the i-th row and j-th column of the fourth matrix is denoted as M2 _ij , then the element in the i-th row and j-th column of the fifth matrix is denoted M3 _ij and M3 _ij = M1 _ij × M2 _ij , or the elements in the i-th row and j-th column of the sixth matrix are represented as M4 _ij and M4 _ij = M1 _ij × M2 _ij , and the fifth matrix Any two columns in the sixth matrix are obtained by conjugation; i and j are integers of 1 to 2N.

In a possible implementation design, the m-th element of the first vector is represented as V1 _m , the m-th element of a second vector corresponding to the first vector is represented as V2 _m , and the first vector The mth element of the corresponding second vector is represented as V3 _m , where m is an integer from 1 to 2N, then when m is taken from the first subset of 1 to 2N, V2 _m = V1 _m and V3 _m = 0, When m takes the second subset of 1 to 2N, V2 _m = 0 and V3 _m = V1 _m ; wherein the intersection of the first subset and the second subset is an empty set, and the first subset The union of the set and the second subset is an integer of 1 to 2N, and the number of non-zero elements of the two second vectors corresponding to the first vector are both equal to N.

In a third aspect, an embodiment of the present application provides a communication apparatus applied to a first terminal device. The first terminal device includes 4N antenna ports, and the 4N antenna ports are divided into 2N antenna port pairs, where N is A positive integer greater than 1, the device includes:

A processing unit, configured to obtain a target codebook when sending information to a second terminal device through a side chain, where the target codebook is a codebook obtained according to a first matrix, and the first matrix is obtained according to a second matrix A matrix for mapping consecutive 2N modulation symbols to each antenna port; wherein the second matrix is a 2N × 2N matrix having a rank equal to 2N, the second matrix includes 2N first vectors, and the 2N A first vector corresponds one-to-one with the 2N antenna ports, the first matrix includes 4N second vectors, the 4N second vectors correspond one-to-one with the 4N antenna ports, and each second vector Including 2N elements, and every two second vectors correspond to a first vector;

A sending unit is configured to encode the information according to the target codebook, and send the encoded information to a second terminal device through a side chain.

In a possible implementation design, the second matrix is a matrix obtained according to a third matrix and a fourth matrix;

The third matrix is a 2N × 2N matrix determined according to consecutive 2N modulation symbols;

The fourth matrix is a 2N × 2N matrix composed of 1 and -1 with a rank of 2N, and any two row vectors are orthogonal vectors.

In a possible implementation design, N is equal to 2, and the elements of any two column vectors of the third matrix are any two modulation symbols of four consecutive modulation symbols, and the other two column vectors of the third matrix are The element of is the conjugate of the other two modulation symbols among the four consecutive modulation symbols.

In a possible implementation design, N is equal to 2, and the third matrix includes any one of the following:

或

or

s _4i、s _4i+1、s _4i+2和s _4i+3表示4个连续的调制符号，*表示取共轭。 among them,

s _4i , s _{4i + 1} , s _{4i + 2} and s _{4i + 3} represent 4 consecutive modulation symbols, and * represents taking conjugate.

In a possible implementation design, the second matrix is a matrix obtained by adjusting a position of an element in a row vector in the fifth matrix, and each row and each column in the second matrix includes a continuous 2N Modulation symbols

Wherein, the element in the i-th row and j-th column of the third matrix is denoted as M1 _ij , and the element in the i-th row and j-th column of the fourth matrix is denoted as M2 _ij , then the element in the i-th row and j-th column of the fifth matrix is denoted M3 _ij and M3 _ij = M1 _ij × M2 _ij , or the elements in the i-th row and j-th column of the sixth matrix are represented as M4 _ij and M4 _ij = M1 _ij × M2 _ij , and the fifth matrix Any two rows in the sixth matrix are obtained by conjugate; i and j are integers of 1 to 2N.

In a possible implementation design, N is equal to 2, and the elements of any two row vectors of the third matrix are any two modulation symbols of four consecutive modulation symbols, and the other two row vectors of the third matrix are The element of is the conjugate of the other two modulation symbols among the four consecutive modulation symbols.

In a possible implementation design, N is equal to 2, and the third matrix includes any one of the following:

或

or

Among them, E = [1 1 1 1], s _4i , s _{4i + 1} , s _{4i + 2} and s _{4i + 3} represent 4 consecutive modulation symbols, i is a natural number starting from 1, and * represents conjugate.

In a possible implementation design, the second matrix is a matrix obtained by adjusting a position of an element in a column vector in a fifth matrix, and each row and each column in the second matrix includes a continuous 2N Modulation symbols

Wherein, the element in the i-th row and j-th column of the third matrix is denoted as M1 _ij , and the element in the i-th row and j-th column of the fourth matrix is denoted as M2 _ij , then the element in the i-th row and j-th column of the fifth matrix is denoted M3 _ij and M3 _ij = M1 _ij × M2 _ij , or the elements in the i-th row and j-th column of the sixth matrix are represented as M4 _ij and M4 _ij = M1 _ij × M2 _ij , and the fifth matrix Any two columns in the sixth matrix are obtained by conjugation; i and j are integers of 1 to 2N.

In a possible implementation design, the m-th element of the first vector is represented as V1 _m , the m-th element of a second vector corresponding to the first vector is represented as V2 _m , and the first vector The mth element of the corresponding second vector is represented as V3 _m , where m is an integer from 1 to 2N, then when m is taken from the first subset of 1 to 2N, V2 _m = V1 _m and V3 _m = 0, When m takes the second subset of 1 to 2N, V2 _m = 0 and V3 _m = V1 _m ; wherein the intersection of the first subset and the second subset is an empty set, and the first subset The union of the set and the second subset is an integer of 1 to 2N, and the number of non-zero elements of the two second vectors corresponding to the first vector are both equal to N.

The beneficial effects provided by the third aspect and the source implementation provided by the third aspect of the third aspect may refer to the benefits provided by the first aspect and the possible implementation manners of the first aspect, and will not be repeated here. To repeat.

In a fourth aspect, an embodiment of the present application provides a communication device applied to a second terminal device. The second terminal device includes 4N antenna ports, and the 4N antenna ports are divided into 2N antenna port pairs, where N is A positive integer greater than 1, the device includes:

A determining unit, configured to obtain a target codebook when receiving information from a first terminal device through a side chain, where the target codebook is a codebook obtained according to a first matrix, and the first matrix is obtained according to a second matrix A matrix for mapping consecutive 2N modulation symbols to each antenna port; wherein the second matrix is a 2N × 2N matrix having a rank equal to N, and the second matrix includes N first vectors, and the N A first vector corresponds one-to-one to the N antenna ports, the first matrix includes 2N second vectors, the 2N second vectors correspond one-to-one to the 2N antenna ports, each second vector Including 2N elements, and every two second vectors correspond to a first vector;

A demodulation unit is configured to demodulate information received from the first terminal device through a side chain according to the target codebook.

In a possible implementation design, the second matrix is a matrix obtained according to a third matrix and a fourth matrix;

The third matrix is a 2N × 2N matrix determined according to consecutive 2N modulation symbols;

The fourth matrix is a 2N × 2N matrix composed of 1 and -1 with a rank of 2N, and any two row vectors are orthogonal vectors.

In a possible implementation design, N is equal to 2, and the elements of any two column vectors of the third matrix are any two modulation symbols of four consecutive modulation symbols, and the other two column vectors of the third matrix are The element of is the conjugate of the other two modulation symbols among the four consecutive modulation symbols.

In a possible implementation design, N is equal to 2, and the third matrix includes any one of the following:

或

or

s _4i、s _4i+1、s _4i+2和s _4i+3表示4个连续的调制符号，*表示取共轭。 among them,

s _4i , s _{4i + 1} , s _{4i + 2} and s _{4i + 3} represent 4 consecutive modulation symbols, and * represents taking conjugate.

In a possible implementation design, the second matrix is a matrix obtained by adjusting a position of an element in a row vector in the fifth matrix, and each row and each column in the second matrix includes a continuous 2N Modulation symbols

Wherein, the element in the i-th row and j-th column of the third matrix is denoted as M1 _ij , and the element in the i-th row and j-th column of the fourth matrix is denoted as M2 _ij , then the element in the i-th row and j-th column of the fifth matrix is denoted M3 _ij and M3 _ij = M1 _ij × M2 _ij , or the elements in the i-th row and j-th column of the sixth matrix are represented as M4 _ij and M4 _ij = M1 _ij × M2 _ij , and the fifth matrix Any two rows in the sixth matrix are obtained by conjugate; i and j are integers of 1 to 2N.

In a possible implementation design, N is equal to 2, and the elements of any two row vectors of the third matrix are any two modulation symbols of four consecutive modulation symbols, and the other two row vectors of the third matrix are The element of is the conjugate of the other two modulation symbols among the four consecutive modulation symbols.

In a possible implementation design, N is equal to 2, and the third matrix includes any one of the following:

或

or

Among them, E = [1111], s _4i , s _{4i + 1} , s _{4i + 2} and s _{4i + 3} represent 4 consecutive modulation symbols, i is a natural number starting from 1, and * represents conjugate.

In a possible implementation design, the second matrix is a matrix obtained by adjusting a position of an element in a column vector in a fifth matrix, and each row and each column in the second matrix includes a continuous 2N Modulation symbols

Wherein, the element in the i-th row and j-th column of the third matrix is denoted as M1 _ij , and the element in the i-th row and j-th column of the fourth matrix is denoted as M2 _ij , then the element in the i-th row and j-th column of the fifth matrix is denoted M3 _ij and M3 _ij = M1 _ij × M2 _ij , or the elements in the i-th row and j-th column of the sixth matrix are represented as M4 _ij and M4 _ij = M1 _ij × M2 _ij , and the fifth matrix Any two columns in the sixth matrix are obtained by conjugation; i and j are integers of 1 to 2N.

In a possible implementation design, the m-th element of the first vector is represented as V1 _m , the m-th element of a second vector corresponding to the first vector is represented as V2 _m , and the first vector The mth element of the corresponding second vector is represented as V3 _m , where m is an integer from 1 to 2N, then when m is taken from the first subset of 1 to 2N, V2 _m = V1 _m and V3 _m = 0, When m takes the second subset of 1 to 2N, V2 _m = 0 and V3 _m = V1 _m ; wherein the intersection of the first subset and the second subset is an empty set, and the first subset The union of the set and the second subset is an integer of 1 to 2N, and the number of non-zero elements of the two second vectors corresponding to the first vector are both equal to N.

For the source side provided by the fourth aspect and the possible implementation manners of the fourth aspect, for the beneficial effects, reference may be made to the beneficial effects brought by the second aspect and the possible implementation manners of the second aspect, and will not be repeated here. To repeat.

In a fifth aspect, an embodiment of the present application provides a communication apparatus applied to a first terminal device. The first terminal device includes 4N antenna ports, and the 4N antenna ports are divided into 2N antenna port pairs, where N is A positive integer greater than 1, the device includes: a processor and a transmitter;

The processor is configured to obtain a target codebook when sending information to a second terminal device through a side chain, where the target codebook is a codebook obtained according to a first matrix, and the first matrix is based on a second matrix. The obtained matrix for mapping consecutive 2N modulation symbols to each antenna port; wherein the second matrix is a 2N × 2N matrix having a rank equal to 2N, and the second matrix includes 2N first vectors, where 2N first vectors correspond one-to-one with the 2N antenna ports, the first matrix includes 4N second vectors, and the 4N second vectors correspond one-to-one with the 4N antenna ports. The two vectors include 2N elements, and every two second vectors correspond to a first vector;

The transmitter is configured to encode the information according to the target codebook, and send the encoded information to a second terminal device through a side chain.

In a possible implementation design, the second matrix is a matrix obtained according to a third matrix and a fourth matrix;

The third matrix is a 2N × 2N matrix determined according to consecutive 2N modulation symbols;

The fourth matrix is a 2N × 2N matrix composed of 1 and -1 with a rank of 2N, and any two row vectors are orthogonal vectors.

In a possible implementation design, N is equal to 2, and the elements of any two column vectors of the third matrix are any two modulation symbols of four consecutive modulation symbols, and the other two column vectors of the third matrix are The element of is the conjugate of the other two modulation symbols among the four consecutive modulation symbols.

In a possible implementation design, N is equal to 2, and the third matrix includes any one of the following:

或

or

s _4i、s _4i+1、s _4i+2和s _4i+3表示4个连续的调制符号，*表示取共轭。 among them,

s _4i , s _{4i + 1} , s _{4i + 2} and s _{4i + 3} represent 4 consecutive modulation symbols, and * represents taking conjugate.

In a possible implementation design, the second matrix is a matrix obtained by adjusting a position of an element in a row vector in the fifth matrix, and each row and each column in the second matrix includes a continuous 2N Modulation symbols

Wherein, the element in the i-th row and j-th column of the third matrix is denoted as M1 _ij , and the element in the i-th row and j-th column of the fourth matrix is denoted as M2 _ij , then the element in the i-th row and j-th column of the fifth matrix is denoted M3 _ij and M3 _ij = M1 _ij × M2 _ij , or the elements in the i-th row and j-th column of the sixth matrix are represented as M4 _ij and M4 _ij = M1 _ij × M2 _ij , and the fifth matrix Any two rows in the sixth matrix are obtained by conjugate; i and j are integers of 1 to 2N.

In a possible implementation design, N is equal to 2, and the elements of any two row vectors of the third matrix are any two modulation symbols of four consecutive modulation symbols, and the other two row vectors of the third matrix are The element of is the conjugate of the other two modulation symbols among the four consecutive modulation symbols.

In a possible implementation design, N is equal to 2, and the third matrix includes any one of the following:

或

or

Among them, E = [1111], s _4i , s _{4i + 1} , s _{4i + 2} and s _{4i + 3} represent 4 consecutive modulation symbols, i is a natural number starting from 1, and * represents conjugate.

In a possible implementation design, the second matrix is a matrix obtained by adjusting a position of an element in a column vector in a fifth matrix, and each row and each column in the second matrix includes a continuous 2N Modulation symbols

Wherein, the element in the i-th row and j-th column of the third matrix is denoted as M1 _ij , and the element in the i-th row and j-th column of the fourth matrix is denoted as M2 _ij , then the element in the i-th row and j-th column of the fifth matrix is denoted M3 _ij and M3 _ij = M1 _ij × M2 _ij , or the elements in the i-th row and j-th column of the sixth matrix are represented as M4 _ij and M4 _ij = M1 _ij × M2 _ij , and the fifth matrix Any two columns in the sixth matrix are obtained by conjugation; i and j are integers of 1 to 2N.

In a possible implementation design, the m-th element of the first vector is represented as V1 _m , the m-th element of a second vector corresponding to the first vector is represented as V2 _m , and the first vector The mth element of the corresponding second vector is represented as V3 _m , where m is an integer from 1 to 2N, then when m is taken from the first subset of 1 to 2N, V2 _m = V1 _m and V3 _m = 0, When m takes the second subset of 1 to 2N, V2 _m = 0 and V3 _m = V1 _m ; wherein the intersection of the first subset and the second subset is an empty set, and the first subset The union of the set and the second subset is an integer of 1 to 2N, and the number of non-zero elements of the two second vectors corresponding to the first vector are both equal to N.

The source side provided by the fifth aspect and the possible implementation manners of the fifth aspect may refer to the foregoing first aspect and the beneficial effects brought by the possible implementation manners of the first aspect, and will not be repeated here. To repeat.

In a sixth aspect, an embodiment of the present application provides a communication apparatus applied to a second terminal device. The second terminal device includes 4N antenna ports, and the 4N antenna ports are divided into 2N antenna port pairs, where N is A positive integer greater than 1, the device includes: a processor and a receiver;

The processor is configured to obtain a target codebook when receiving information from a first terminal device through a side chain, where the target codebook is a codebook obtained according to a first matrix, and the first matrix is based on a second matrix. The obtained matrix for mapping consecutive 2N modulation symbols to each antenna port; wherein the second matrix is a 2N × 2N matrix having a rank equal to N, and the second matrix includes N first vectors, where The N first vectors correspond one-to-one with the N antenna ports, the first matrix includes 2N second vectors, the 2N second vectors correspond one-to-one with the 2N antenna ports, and each The two vectors include 2N elements, and every two second vectors correspond to a first vector;

The processor is configured to demodulate information received by the receiver from the first terminal device through a side chain according to the target codebook.

In a possible implementation design, the second matrix is a matrix obtained according to a third matrix and a fourth matrix;

The third matrix is a 2N × 2N matrix determined according to consecutive 2N modulation symbols;

The fourth matrix is a 2N × 2N matrix composed of 1 and -1 with a rank of 2N, and any two row vectors are orthogonal vectors.

In a possible implementation design, N is equal to 2, and the elements of any two column vectors of the third matrix are any two modulation symbols of four consecutive modulation symbols, and the other two column vectors of the third matrix are The element of is the conjugate of the other two modulation symbols among the four consecutive modulation symbols.

In a possible implementation design, N is equal to 2, and the third matrix includes any one of the following:

或

or

s _4i、s _4i+1、s _4i+2和s _4i+3表示4个连续的调制符号，*表示取共轭。 among them,

s _4i , s _{4i + 1} , s _{4i + 2} and s _{4i + 3} represent 4 consecutive modulation symbols, and * represents taking conjugate.

In a possible implementation design, the second matrix is a matrix obtained by adjusting a position of an element in a row vector in the fifth matrix, and each row and each column in the second matrix includes a continuous 2N Modulation symbols

Wherein, the element in the i-th row and j-th column of the third matrix is denoted as M1 _ij , and the element in the i-th row and j-th column of the fourth matrix is denoted as M2 _ij , then the element in the i-th row and j-th column of the fifth matrix is denoted M3 _ij and M3 _ij = M1 _ij × M2 _ij , or the elements in the i-th row and j-th column of the sixth matrix are represented as M4 _ij and M4 _ij = M1 _ij × M2 _ij , and the fifth matrix Any two rows in the sixth matrix are obtained by conjugate; i and j are integers of 1 to 2N.

In a possible implementation design, N is equal to 2, and the elements of any two row vectors of the third matrix are any two modulation symbols of four consecutive modulation symbols, and the other two row vectors of the third matrix are The element of is the conjugate of the other two modulation symbols among the four consecutive modulation symbols.

In a possible implementation design, N is equal to 2, and the third matrix includes any one of the following:

或

or

Among them, E = [1 1 1 1], s _4i , s _{4i + 1} , s _{4i + 2} and s _{4i + 3} represent 4 consecutive modulation symbols, i is a natural number starting from 1, and * represents conjugate.

In a possible implementation design, the second matrix is a matrix obtained by adjusting a position of an element in a column vector in a fifth matrix, and each row and each column in the second matrix includes a continuous 2N Modulation symbols

Wherein, the element in the i-th row and j-th column of the third matrix is denoted as M1 _ij , and the element in the i-th row and j-th column of the fourth matrix is denoted as M2 _ij , then the element in the i-th row and j-th column of the fifth matrix is denoted M3 _ij and M3 _ij = M1 _ij × M2 _ij , or the elements in the i-th row and j-th column of the sixth matrix are represented as M4 _ij and M4 _ij = M1 _ij × M2 _ij , and the fifth matrix Any two columns in the sixth matrix are obtained by conjugation; i and j are integers of 1 to 2N.

In a possible implementation design, the m-th element of the first vector is represented as V1 _m , the m-th element of a second vector corresponding to the first vector is represented as V2 _m , and the first vector The mth element of the corresponding second vector is represented as V3 _m , where m is an integer from 1 to 2N, then when m is taken from the first subset of 1 to 2N, V2 _m = V1 _m and V3 _m = 0, When m takes the second subset of 1 to 2N, V2 _m = 0 and V3 _m = V1 _m ; wherein the intersection of the first subset and the second subset is an empty set, and the first subset The union of the set and the second subset is an integer of 1 to 2N, and the number of non-zero elements of the two second vectors corresponding to the first vector are both equal to N.

The beneficial effects provided by the sixth aspect and the possible implementation manners of the sixth aspect may refer to the beneficial effects brought by the second aspect and the possible implementation manners of the second aspect, and are not repeated here. To repeat.

In a seventh aspect, an embodiment of the present application provides a chip, including: a processor;

The processor is configured to execute the method according to any one of the first aspects.

In a possible implementation design, the chip further includes: a memory;

The memory is used for storing instructions;

The processor is specifically configured to call an instruction stored in the processor to execute the method according to any one of the foregoing first aspects.

In an eighth aspect, an embodiment of the present application provides a chip, including: a processor;

The processor is configured to execute the method according to any one of the second aspects.

In a possible implementation design, the chip further includes: a memory;

The memory is used for storing instructions;

The processor is specifically configured to call an instruction stored in the processor to execute the method according to any one of the foregoing second aspects.

In a ninth aspect, an embodiment of the present application provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the method according to any one of the first aspects is implemented.

In a tenth aspect, an embodiment of the present application provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the method according to any one of the foregoing second aspects is implemented.

According to an eleventh aspect, an embodiment of the present application provides a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, any one of the first aspects is executed. Methods.

In a twelfth aspect, an embodiment of the present application provides a computer program product, where the computer program product includes one or more computer instructions, and when the computer instructions are loaded and executed on a computer, any one of the second aspects is executed Methods.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of an application architecture according to an embodiment of the present application;

2 is a flowchart of a communication method according to an embodiment of the present application;

3 is a schematic structural diagram of a communication device according to an embodiment of the present application;

4 is a schematic structural diagram of a communication device according to another embodiment of the present application;

5 is a schematic structural diagram of a communication device according to an embodiment of the present application;

6 is a schematic structural diagram of a communication device according to another embodiment of the present application;

7 is a schematic structural diagram of a chip according to an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a chip according to another embodiment of the present application.

detailed description

FIG. 1 is a schematic diagram of an application architecture according to an embodiment of the present application. As shown in FIG. 1, the application architecture of this embodiment may include a first terminal device and a second terminal device. The first terminal device and the second terminal device can perform side-chain SL transmission. Specifically, the first terminal device and the second terminal device each include 4N antenna ports, and the 4N antenna ports are divided into 2N antenna port pairs, where N is a positive integer, and the 4N antenna ports are used for the first terminal. Device and side-chain SL transmission of the second terminal device.

Among them, terminal equipment, which can also be called user equipment, can include, but is not limited to, user terminal equipment (customer equipment, CPE), smart phones (such as Android phones, IOS phones, etc.), multimedia devices, streaming media devices, personal computers, Internet devices such as tablet computers, PDAs, mobile Internet devices (MIDs) or wearable smart devices.

In the prior art, SL-based communication is implemented between two terminal devices through only one antenna port. Specifically, the terminal device 1 sends information to the terminal device 2 through a side chain, and sends the information to the terminal device 2 through an antenna port. The terminal device 2 receives the information sent by the terminal device 1 through the side chain through the antenna port.

Hereinafter, some embodiments of the present invention will be described in detail with reference to the drawings. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

FIG. 2 is a flowchart of a communication method according to an embodiment of the present application. As shown in FIG. 2, the method in this embodiment may include:

Step 201: When the first terminal device determines to send information to the second terminal device through the side chain, obtain the target codebook.

In this step, the target codebook may be configured or predefined by the network. In a certain network, if the network is configured with only one codebook or only one predefined codebook, the first terminal device and the second terminal device may The codebook defaults to the target codebook of the current network; if a codebook set is configured in a certain network, the codebook set may include multiple codebooks (greater than 1), and the first terminal device sends the When the two terminal devices send information, they can inform the second terminal device of the target codebook in the codebook set in advance. For example, the target codebook can be indicated to the second terminal device through the control information of the side chain. The target codebook may also be selected by the first terminal device. If the first terminal device selects the codebook by itself, the first terminal device may notify the second terminal device in advance when it sends information to the second terminal device through the side chain. The self-selected codebook is the target codebook. For example, the second terminal device instructs the first terminal device to select the self-selected codebook through the control information of the side chain.

The target codebook is related to the first matrix. Specifically, the target codebook is a codebook obtained according to the first matrix, and the first matrix is obtained according to the second matrix. A matrix of modulation symbols is mapped to each antenna port. That is, the target codebook can map consecutive 2N modulation symbols to each antenna port, and the specific mapping manner is obtained according to the first matrix.

In addition, the second matrix is a 2N × 2N matrix with a rank equal to 2N. The second matrix includes 2N first vectors, and the 2N first vectors correspond to the 2N antenna port pairs one to one. The first matrix includes 4N second vectors, and the 4N second vectors are in one-to-one correspondence with the 4N antenna ports. Each second vector includes 2N elements, and every two second vectors correspond to a first vector. .

It should be noted that the purpose of the rank of the second matrix equal to 2N is to ensure the orthogonality of the target codebook, so that the data sent by each antenna port is relatively independent, and the space diversity effect of the antenna is fully used. Both the first matrix and the second matrix are used to carry consecutive 2N modulation symbols.

The two second vectors correspond to one first vector. It can be understood that the two second vectors can be determined according to the first vector. It should be noted that the specific manner of determining the two second vectors according to the first vector may be flexibly designed according to actual requirements.

Considering reducing the correlation between sub-carriers and improving the decoding recognizability, optionally, it is assumed that the m-th element of the first vector is represented as V1 _m , and the first vector of the second vector corresponds to the first vector. m elements are represented as V2 _m , and the m-th element of another second vector corresponding to the first vector is represented as V3 _m , where m is an integer from 1 to 2N, and when m is the first child of 1 to 2N When set, V2 _m = V1 _m and V3 _m = 0, when m takes a second subset of 1 to 2N, V2 _m = 0 and V3 _m = V1 _m ; wherein the first subset and the first subset The intersection of the two subsets is an empty set, and the union of the first subset and the second subset is an integer from 1 to 2N. Further optionally, the number of non-zero elements of the two second vectors corresponding to the first vector are both equal to N. Here, the number of non-zero elements of the two second vectors corresponding to the first vector is equal to N, and the frequency domain duty cycle for any port can be 1/2. In this way, the impact of frequency selective fading can be reduced through data spreading, and the interference between various ports can be reduced through sparse 1/2 spreading, while reducing the decoding complexity.

Based on the realization that the second matrix carries consecutive 2N modulation symbols, and the second matrix is a 2N × 2N matrix with a rank equal to 2N, optionally, the second matrix may be a matrix obtained according to the third matrix and the fourth matrix . The third matrix is a 2N × 2N matrix determined according to consecutive 2N modulation symbols, the fourth matrix is a rank of 2N composed of 1 and -1, and any two row vectors are orthogonal vectors 2N × 2N matrix. Here, the fourth matrix is a 2N × 2N matrix composed of 1 and -1 with a rank of 2N, and any two row vectors are orthogonal vectors, thereby achieving orthogonality between adjacent subcarriers.

It should be noted that, in the embodiment of the present application, the first vector may be a row vector or the same column. When the first vector is a row vector, the second vector may be a row vector or a column vector, that is, a row vector of the second matrix may correspond to two row vectors or two column vectors of the first matrix. When the first vector is a column vector, the second vector may be a row vector or a column vector, that is, a column vector of the second matrix, and may correspond to two row vectors or two column vectors of the first matrix.

Considering that the modulation symbol is conjugated, the phase can be rotated by 90 degrees, thereby ensuring the orthogonality of the codebook. The receiver can obtain the receiving gain through simple linear decoding to achieve the optimal performance of the linear receiver. Optionally, the elements in the third matrix may include a conjugate of at least one modulation symbol among the 2N modulation symbols.

Taking N equal to 2 as an example, optionally, the elements of any two column vectors of the third matrix are any two modulation symbols among four consecutive modulation symbols, and the elements of the other two column vectors of the third matrix are Is the conjugate of the other two modulation symbols among the four consecutive modulation symbols. Here, by taking the conjugate, the phase can be rotated by 90 degrees, thereby ensuring the orthogonality of the codebook. The receiving end can obtain the receiving gain through simple linear decoding and achieve the optimal performance of the linear receiver. Further optionally, the third matrix includes any one of the following:

或

or

s _4i、s _4i+1、s _4i+2和s _4i+3表示4个连续的调制符号，i取从1开始的自然数，*表示取共轭。 among them,

s _4i , s _{4i + 1} , s _{4i + 2} and s _{4i + 3} represent 4 consecutive modulation symbols, i is a natural number starting from 1, and * is conjugate.

Further optionally, the second matrix is a matrix obtained by adjusting a position of an element in a row vector in the fifth matrix, and each row and each column in the second matrix includes consecutive 2N modulation symbols;

Wherein, the element in the i-th row and j-th column of the third matrix is denoted as M1 _ij , and the element in the i-th row and j-th column of the fourth matrix is denoted as M2 _ij , then the element in the i-th row and j-th column of the fifth matrix is denoted M3 _ij and M3 _ij = M1 _ij × M2 _ij , or the elements in the i-th row and j-th column of the sixth matrix are represented as M4 _ij and M4 _ij = M1 _ij × M2 _ij , and the fifth matrix Any two rows in the sixth matrix are obtained by conjugate; i and j are integers of 1 to 2N.

Here, the second matrix is a matrix obtained by adjusting the position of elements in the row vector in the fifth matrix, and each row and each column in the second matrix includes consecutive 2N modulation symbols, which can be implemented. Each antenna port pair can transmit 2N consecutive modulation symbols, which can support the dynamic expansion of the number of antenna port pairs.

In addition, by using the fifth matrix as a matrix obtained by conjugating any two rows in the sixth matrix, the difference in data sent by each subcarrier can be further manufactured, so that the spreading gain is increased.

Alternatively, the elements of any two row vectors of the third matrix are any two modulation symbols of the four consecutive modulation symbols, and the elements of the other two row vectors of the third matrix are the four consecutive modulation symbols. Conjugate of the other two modulation symbols in. Further optionally, the third matrix includes any one of the following:

或

or

Among them, E = [1 1 1 1], s _4i , s _{4i + 1} , s _{4i + 2} and s _{4i + 3} represent 4 consecutive modulation symbols, i is a natural number starting from 1, and * represents conjugate.

Optionally, the second matrix is a matrix obtained by adjusting a position of an element in a column vector in the fifth matrix, and each row and each column in the second matrix includes consecutive 2N modulation symbols.

Among them, assuming that the element in the i-th row and j-th column of the third matrix is denoted as M1 _ij and the element in the i-th row and j-th column of the fourth matrix is denoted as M2 _ij , then the element in the i-th row and j-th column of the fifth matrix is Is expressed as M3 _ij and M3 _ij = M1 _ij × M2 _ij ; or, the elements in the i-th row and j-th column of the sixth matrix are expressed as M4 _ij and M4 _ij = M1 _ij × M2 _ij , and the fifth matrix is a pair of The matrix obtained by taking the conjugate of any two columns in the sixth matrix is further described to further create the difference in the data transmitted by each subcarrier, so that the spreading gain is increased; i and j each take an integer from 1 to 2N.

Since the 2N first vectors included in the second matrix correspond to the 2N antenna port pairs one by one, here, each row and column in the second matrix contains consecutive 2N modulation symbols, and each antenna port can be implemented. Each pair can transmit continuous 2N modulation symbols, which can support the dynamic expansion of the number of antenna port pairs. In this way, each antenna port pair contains all the modulation symbols, and the receiver can complete the decoding as long as it receives the information of one antenna port pair. In this way, the codebook has better scalability and reduces the port with poor channel status. The resulting impact enables the receiving end to correctly decode even if it only receives information sent by some ports.

Optionally, when N is equal to 2, the fourth matrix may specifically be any 4 × 4 matrix composed of 1 and -1 with a rank of 4 and any two row vectors being orthogonal vectors. Further optionally, when N is equal to 2, the fourth matrix may be a matrix generated by taking any element in each of the four vector sets as a row vector. Among them, the four vector sets can be represented as Set1, Set2, Set3, and Set4, respectively; and, Set1: {[1 ]}; Set3: {[1, -1, -1], [-1, -1, 1]}; Set4: {[1, -1, -1], [-1, -1, 1]}. Here, by including the fourth matrix with any one of the above, orthogonality between adjacent subcarriers can be achieved.

It should be noted that any specific implementation method for generating a second matrix that satisfies the condition that the second matrix carries consecutive 2N modulation symbols and the second matrix is a 2N × 2N matrix with a rank equal to 2N is protected by this application. range.

第四矩阵为

为例： With N = 2, the number of antenna port pairs is equal to 8, and the third matrix is

The fourth matrix is

For example:

1) According to the third matrix and the fourth matrix, a sixth matrix can be obtained as:

2) The fifth matrix obtained by conjugating the first and second rows of the sixth matrix is:

3) The second matrix obtained by adjusting the position of the elements in the row vector of the fifth matrix is:

Furthermore, taking the first vector as a column vector as an example, the first column of the second matrix corresponds to antenna port pair 0, the second column of the second matrix corresponds to antenna port pair 1, and the third column of the second matrix corresponds to antenna port pair 2. The fourth column of the second matrix corresponds to the antenna port pair 3.

4) When the first vector and the second vector are both column vectors, the first matrix may be, for example:

Based on the first matrix obtained in 4), the first and second column vector of the first matrix can correspond to two antenna ports of antenna port pair 0, and the third and fourth columns of the first matrix The vector can correspond to two antenna ports of antenna port pair 1, the fifth and sixth columns of the first matrix can correspond to the two antenna ports of antenna port pair 2, the seventh and eighth columns of the first matrix The vector can correspond to two antenna ports of antenna port pair 3.

Step 202: The first terminal device encodes the information according to the target codebook, and sends the encoded information to the second terminal device through a side chain.

In this step, the information to be sent to the second terminal device through the side chain may be coded and modulated to obtain a corresponding modulation symbol. Further, for continuous 2N modulation symbols, the target codebook can be used for encoding. Specifically, the modulation symbols output after the information is coded and modulated can be divided into blocks. Each data block can contain consecutive 2N modulation symbols. Each data block can be coded together through the target codebook, and the coded output can be mapped accordingly. On 2N REs of frequency domain resources of each antenna port for side chain transmission.

Here, the first terminal device encodes the information that the first terminal device needs to send to the second terminal device through the side chain according to the target codebook, so that the diversity transmission of the transmission information on the side chain can be achieved, so that the second terminal device More independent fading signals of the same modulation symbol can be obtained, thereby improving transmission reliability.

Step 203: When the second terminal device determines to receive information from the first terminal device through a side chain, obtain a target codebook.

In this step, the target codebook may be configured or predefined by the network. In a certain network, if the network is configured with only one codebook or only one predefined codebook, the first terminal device and the second terminal device may The codebook defaults to the target codebook of the current network; if a codebook set is configured in a certain network, the codebook set may include multiple codebooks (greater than 1), and the first terminal device sends the When the two terminal devices send information, they can inform the second terminal device of the target codebook in the codebook set in advance. For example, the target codebook can be indicated to the second terminal device through the control information of the side chain. The target codebook may also be selected by the first terminal device. If the first terminal device selects the codebook by itself, the first terminal device may notify the second terminal device in advance when it sends information to the second terminal device through the side chain. The self-selected codebook is the target codebook. For example, the second terminal device instructs the first terminal device to select the self-selected codebook through the control information of the side chain.

It should be noted that, in this step, for the specific content of the target codebook, refer to the related description of step 201, and details are not described herein again.

Step 204: The second terminal device demodulates information received from the first terminal device through a side chain according to the target codebook.

In this embodiment, when it is determined by the first terminal device to send information to the second terminal device through the side chain, the target codebook is obtained and the information is encoded according to the target codebook, and the encoded information is sent to the second terminal device through the side chain. When the second terminal device determines to receive information from the first terminal device through the side chain, it acquires the target codebook and demodulates the information received from the first terminal device through the side chain according to the target codebook. Two terminal devices can be implemented Diversity transmission of information that needs side-chain transmission between them enables the second terminal device to obtain more independent fading signals of the same modulation symbol, thereby improving transmission reliability.

FIG. 3 is a schematic structural diagram of a communication device according to an embodiment of the present application. The communication device may be implemented in software, hardware, or a combination of software and hardware, and is applied to the first terminal device. As shown in FIG. 3, the communication device includes a processing unit 301 and a sending unit 302. among them,

The processing unit 301 is configured to obtain a target codebook when sending information to a second terminal device through a side chain, where the target codebook is a codebook obtained according to a first matrix, and the first matrix is obtained according to a second matrix. Matrix for mapping consecutive 2N modulation symbols to each antenna port; wherein the second matrix is a 2N × 2N matrix with a rank equal to 2N, the second matrix includes 2N first vectors, and the 2N First vectors correspond one-to-one to the 2N antenna ports, the first matrix includes 4N second vectors, the 4N second vectors correspond one-to-one to the 4N antenna ports, each second The vector includes 2N elements, and every two second vectors correspond to a first vector;

The sending unit 302 is configured to encode the information according to the target codebook, and send the encoded information to a second terminal device through a side chain.

In a possible implementation design, the second matrix is a matrix obtained according to a third matrix and a fourth matrix;

The third matrix is a 2N × 2N matrix determined according to consecutive 2N modulation symbols;

The fourth matrix is a 2N × 2N matrix composed of 1 and -1 with a rank of 2N, and any two row vectors are orthogonal vectors.

In a possible implementation design, N is equal to 2, and the elements of any two column vectors of the third matrix are any two modulation symbols of four consecutive modulation symbols, and the other two column vectors of the third matrix are The element of is the conjugate of the other two modulation symbols among the four consecutive modulation symbols.

In a possible implementation design, N is equal to 2, and the third matrix includes any one of the following:

或

or

s _4i、s _4i+1、s _4i+2和s _4i+3表示4个连续的调制符号，*表示取共轭。 among them,

s _4i , s _{4i + 1} , s _{4i + 2} and s _{4i + 3} represent 4 consecutive modulation symbols, and * represents taking conjugate.

In a possible implementation design, the second matrix is a matrix obtained by adjusting a position of an element in a row vector in the fifth matrix, and each row and each column in the second matrix includes a continuous 2N Modulation symbols

Wherein, the element in the i-th row and j-th column of the third matrix is denoted as M1 _ij , and the element in the i-th row and j-th column of the fourth matrix is denoted as M2 _ij , then the element in the i-th row and j-th column of the fifth matrix is denoted M3 _ij and M3 _ij = M1 _ij × M2 _ij , or the elements in the i-th row and j-th column of the sixth matrix are represented as M4 _ij and M4 _ij = M1 _ij × M2 _ij , and the fifth matrix Any two rows in the sixth matrix are obtained by conjugate; i and j are integers of 1 to 2N.

In a possible implementation design, N is equal to 2, and the elements of any two row vectors of the third matrix are any two modulation symbols of four consecutive modulation symbols, and the other two row vectors of the third matrix are The element of is the conjugate of the other two modulation symbols among the four consecutive modulation symbols.

In a possible implementation design, N is equal to 2, and the third matrix includes any one of the following:

或

or

Among them, E = [1 1 1 1], s _4i , s _{4i + 1} , s _{4i + 2} and s _{4i + 3} represent 4 consecutive modulation symbols, i is a natural number starting from 1, and * represents conjugate.

In a possible implementation design, the second matrix is a matrix obtained by adjusting a position of an element in a column vector in a fifth matrix, and each row and each column in the second matrix includes a continuous 2N Modulation symbols

Wherein, the element in the i-th row and j-th column of the third matrix is denoted as M1 _ij , and the element in the i-th row and j-th column of the fourth matrix is denoted as M2 _ij , then the element in the i-th row and j-th column of the fifth matrix is denoted M3 _ij and M3 _ij = M1 _ij × M2 _ij , or the elements in the i-th row and j-th column of the sixth matrix are represented as M4 _ij and M4 _ij = M1 _ij × M2 _ij , and the fifth matrix Any two columns in the sixth matrix are obtained by conjugation; i and j are integers of 1 to 2N.

In a possible implementation design, the m-th element of the first vector is represented as V1 _m , the m-th element of a second vector corresponding to the first vector is represented as V2 _m , and the first vector The mth element of the corresponding second vector is represented as V3 _m , where m is an integer from 1 to 2N, then when m is taken from the first subset of 1 to 2N, V2 _m = V1 _m and V3 _m = 0, When m takes the second subset of 1 to 2N, V2 _m = 0 and V3 _m = V1 _m ; wherein the intersection of the first subset and the second subset is an empty set, and the first subset The union of the set and the second subset is an integer of 1 to 2N, and the number of non-zero elements of the two second vectors corresponding to the first vector are both equal to N.

The communication device provided in this embodiment may be used for the technical solution on the first terminal device side in the embodiment shown in FIG. 2. The implementation principles and technical effects are similar, and details are not described herein again.

FIG. 4 is a schematic structural diagram of a communication device according to another embodiment of the present application. The communication device may be implemented in software, hardware, or a combination of software and hardware, and is applied to the foregoing second terminal device. As shown in FIG. 4, the communication device includes: a determining unit 401 and a demodulating unit 402. among them,

A determining unit 401 is configured to determine when receiving information from a first terminal device through a side chain, obtain a target codebook, where the target codebook is a codebook obtained according to a first matrix, and the first matrix is obtained according to a second matrix. Matrix for mapping consecutive 2N modulation symbols to each antenna port; wherein the second matrix is a 2N × 2N matrix having a rank equal to N, the second matrix includes N first vectors, and the N First vectors correspond one-to-one to the N antenna ports, the first matrix includes 2N second vectors, the 2N second vectors correspond one-to-one to the 2N antenna ports, each second The vector includes 2N elements, and every two second vectors correspond to a first vector;

A demodulation unit 402 is configured to demodulate information received from the first terminal device through a side chain according to the target codebook.

In a possible implementation design, the second matrix is a matrix obtained according to a third matrix and a fourth matrix;

The third matrix is a 2N × 2N matrix determined according to consecutive 2N modulation symbols;

The fourth matrix is a 2N × 2N matrix composed of 1 and -1 with a rank of 2N, and any two row vectors are orthogonal vectors.

In a possible implementation design, N is equal to 2, and the elements of any two column vectors of the third matrix are any two modulation symbols of four consecutive modulation symbols, and the other two column vectors of the third matrix are The element of is the conjugate of the other two modulation symbols among the four consecutive modulation symbols.

In a possible implementation design, N is equal to 2, and the third matrix includes any one of the following:

或

or

s _4i、s _4i+1、s _4i+2和s _4i+3表示4个连续的调制符号，*表示取共轭。 among them,

s _4i , s _{4i + 1} , s _{4i + 2} and s _{4i + 3} represent 4 consecutive modulation symbols, and * represents taking conjugate.

In a possible implementation design, the second matrix is a matrix obtained by adjusting a position of an element in a row vector in the fifth matrix, and each row and each column in the second matrix includes a continuous 2N Modulation symbols

Wherein, the element in the i-th row and j-th column of the third matrix is denoted as M1 _ij , and the element in the i-th row and j-th column of the fourth matrix is denoted as M2 _ij , then the element in the i-th row and j-th column of the fifth matrix is denoted M3 _ij and M3 _ij = M1 _ij × M2 _ij , or the elements in the i-th row and j-th column of the sixth matrix are represented as M4 _ij and M4 _ij = M1 _ij × M2 _ij , and the fifth matrix Any two rows in the sixth matrix are obtained by conjugate; i and j are integers of 1 to 2N.

In a possible implementation design, N is equal to 2, and the elements of any two row vectors of the third matrix are any two modulation symbols of four consecutive modulation symbols, and the other two row vectors of the third matrix are The element of is the conjugate of the other two modulation symbols among the four consecutive modulation symbols.

In a possible implementation design, N is equal to 2, and the third matrix includes any one of the following:

或

or

Among them, E = [1 1 1 1], s _4i , s _{4i + 1} , s _{4i + 2} and s _{4i + 3} represent 4 consecutive modulation symbols, i is a natural number starting from 1, and * represents conjugate.

In a possible implementation design, the second matrix is a matrix obtained by adjusting a position of an element in a column vector in a fifth matrix, and each row and each column in the second matrix includes a continuous 2N Modulation symbols

Wherein, the element in the i-th row and j-th column of the third matrix is denoted as M1 _ij , and the element in the i-th row and j-th column of the fourth matrix is denoted as M2 _ij , then the element in the i-th row and j-th column of the fifth matrix is denoted M3 _ij and M3 _ij = M1 _ij × M2 _ij , or the elements in the i-th row and j-th column of the sixth matrix are represented as M4 _ij and M4 _ij = M1 _ij × M2 _ij , and the fifth matrix Any two columns in the sixth matrix are obtained by conjugation; i and j are integers of 1 to 2N.

In a possible implementation design, the m-th element of the first vector is represented as V1 _m , the m-th element of a second vector corresponding to the first vector is represented as V2 _m , and the first vector The mth element of the corresponding second vector is represented as V3 _m , where m is an integer from 1 to 2N, then when m is taken from the first subset of 1 to 2N, V2 _m = V1 _m and V3 _m = 0, When m takes the second subset of 1 to 2N, V2 _m = 0 and V3 _m = V1 _m ; wherein the intersection of the first subset and the second subset is an empty set, and the first subset The union of the set and the second subset is an integer of 1 to 2N, and the number of non-zero elements of the two second vectors corresponding to the first vector are both equal to N.

The communication device provided in this embodiment may be used for the technical solution on the second communication device side in the embodiment shown in FIG. 2. The implementation principles and technical effects are similar, and details are not described herein again.

FIG. 5 is a schematic structural diagram of a communication device according to an embodiment of the present application. The communication device may be implemented in software, hardware, or a combination of software and hardware, and is applied to the first terminal device. As shown in FIG. 3, the communication device includes a processor 501 and a transmitter 502. among them,

The processor 501 is configured to obtain a target codebook when sending information to a second terminal device through a side chain, where the target codebook is a codebook obtained according to a first matrix, and the first matrix is obtained according to a second matrix. A matrix for mapping consecutive 2N modulation symbols to each antenna port; wherein the second matrix is a 2N × 2N matrix with a rank equal to 2N, the second matrix includes 2N first vectors, and the 2N First vectors correspond one-to-one to the 2N antenna ports, the first matrix includes 4N second vectors, the 4N second vectors correspond one-to-one to the 4N antenna ports, each second The vector includes 2N elements, and every two second vectors correspond to a first vector;

The transmitter 502 is configured to encode the information according to the target codebook, and send the encoded information to a second terminal device through a side chain.

In a possible implementation design, the second matrix is a matrix obtained according to a third matrix and a fourth matrix;

The third matrix is a 2N × 2N matrix determined according to consecutive 2N modulation symbols;

The fourth matrix is a 2N × 2N matrix composed of 1 and -1 with a rank of 2N, and any two row vectors are orthogonal vectors.

In a possible implementation design, N is equal to 2, and the elements of any two column vectors of the third matrix are any two modulation symbols of four consecutive modulation symbols, and the other two column vectors of the third matrix are The element of is the conjugate of the other two modulation symbols among the four consecutive modulation symbols.

In a possible implementation design, N is equal to 2, and the third matrix includes any one of the following:

或

or

s _4i、s _4i+1、s _4i+2和s _4i+3表示4个连续的调制符号，*表示取共轭。 among them,

s _4i , s _{4i + 1} , s _{4i + 2} and s _{4i + 3} represent 4 consecutive modulation symbols, and * represents taking conjugate.

In a possible implementation design, the second matrix is a matrix obtained by adjusting a position of an element in a row vector in the fifth matrix, and each row and each column in the second matrix includes a continuous 2N Modulation symbols

Wherein, the element in the i-th row and j-th column of the third matrix is denoted as M1 _ij , and the element in the i-th row and j-th column of the fourth matrix is denoted as M2 _ij , then the element in the i-th row and j-th column of the fifth matrix is denoted M3 _ij and M3 _ij = M1 _ij × M2 _ij , or the elements in the i-th row and j-th column of the sixth matrix are represented as M4 _ij and M4 _ij = M1 _ij × M2 _ij , and the fifth matrix Any two rows in the sixth matrix are obtained by conjugate; i and j are integers of 1 to 2N.

In a possible implementation design, N is equal to 2, and the elements of any two row vectors of the third matrix are any two modulation symbols of four consecutive modulation symbols, and the other two row vectors of the third matrix are The element of is the conjugate of the other two modulation symbols among the four consecutive modulation symbols.

In a possible implementation design, N is equal to 2, and the third matrix includes any one of the following:

或

or

Among them, E = [1 1 1 1], s _4i , s _{4i + 1} , s _{4i + 2} and s _{4i + 3} represent 4 consecutive modulation symbols, i is a natural number starting from 1, and * represents conjugate.

In a possible implementation design, the second matrix is a matrix obtained by adjusting a position of an element in a column vector in a fifth matrix, and each row and each column in the second matrix includes a continuous 2N Modulation symbols

Wherein, the element in the i-th row and j-th column of the third matrix is denoted as M1 _ij , and the element in the i-th row and j-th column of the fourth matrix is denoted as M2 _ij , then the element in the i-th row and j-th column of the fifth matrix is denoted M3 _ij and M3 _ij = M1 _ij × M2 _ij , or the elements in the i-th row and j-th column of the sixth matrix are represented as M4 _ij and M4 _ij = M1 _ij × M2 _ij , and the fifth matrix Any two columns in the sixth matrix are obtained by conjugation; i and j are integers of 1 to 2N.

In a possible implementation design, the m-th element of the first vector is represented as V1 _m , the m-th element of a second vector corresponding to the first vector is represented as V2 _m , and the first vector The mth element of the corresponding second vector is represented as V3 _m , where m is an integer from 1 to 2N, then when m is taken from the first subset of 1 to 2N, V2 _m = V1 _m and V3 _m = 0, When m takes the second subset of 1 to 2N, V2 _m = 0 and V3 _m = V1 _m ; wherein the intersection of the first subset and the second subset is an empty set, and the first subset The union of the set and the second subset is an integer of 1 to 2N, and the number of non-zero elements of the two second vectors corresponding to the first vector are both equal to N.

The communication device provided in this embodiment may be used for the technical solution on the first terminal device side in the embodiment shown in FIG. 2. The implementation principles and technical effects are similar, and details are not described herein again.

FIG. 6 is a schematic structural diagram of a communication apparatus according to another embodiment of the present application. The communication apparatus may be implemented in software, hardware, or a combination of software and hardware, and is applied to the foregoing second terminal device. As shown in FIG. 6, the communication device includes a processor 601 and a receiver 602. among them,

A processor 601, configured to determine a target codebook obtained when receiving information from a first terminal device through a side chain, where the target codebook is a codebook obtained according to a first matrix, and the first matrix is obtained according to a second matrix Matrix for mapping consecutive 2N modulation symbols to each antenna port; wherein the second matrix is a 2N × 2N matrix having a rank equal to N, the second matrix includes N first vectors, and the N First vectors correspond one-to-one to the N antenna ports, the first matrix includes 2N second vectors, the 2N second vectors correspond one-to-one to the 2N antenna ports, each second The vector includes 2N elements, and every two second vectors correspond to a first vector;

The processor 601 is further configured to demodulate information received by the receiver 602 from the first terminal device through a side chain according to the target codebook.

In a possible implementation design, the second matrix is a matrix obtained according to a third matrix and a fourth matrix;

The third matrix is a 2N × 2N matrix determined according to consecutive 2N modulation symbols;

The fourth matrix is a 2N × 2N matrix composed of 1 and -1 with a rank of 2N, and any two row vectors are orthogonal vectors.

In a possible implementation design, N is equal to 2, and the elements of any two column vectors of the third matrix are any two modulation symbols of four consecutive modulation symbols, and the other two column vectors of the third matrix are The element of is the conjugate of the other two modulation symbols among the four consecutive modulation symbols.

In a possible implementation design, N is equal to 2, and the third matrix includes any one of the following:

或

or

s _4i、s _4i+1、s _4i+2和s _4i+3表示4个连续的调制符号，*表示取共轭。 among them,

s _4i , s _{4i + 1} , s _{4i + 2} and s _{4i + 3} represent 4 consecutive modulation symbols, and * represents taking conjugate.

In a possible implementation design, the second matrix is a matrix obtained by adjusting a position of an element in a row vector in the fifth matrix, and each row and each column in the second matrix includes a continuous 2N Modulation symbols

Wherein, the element in the i-th row and j-th column of the third matrix is denoted as M1 _ij , and the element in the i-th row and j-th column of the fourth matrix is denoted as M2 _ij , then the element in the i-th row and j-th column of the fifth matrix is denoted M3 _ij and M3 _ij = M1 _ij × M2 _ij , or the elements in the i-th row and j-th column of the sixth matrix are represented as M4 _ij and M4 _ij = M1 _ij × M2 _ij , and the fifth matrix Any two rows in the sixth matrix are obtained by conjugate; i and j are integers of 1 to 2N.

In a possible implementation design, N is equal to 2, and the elements of any two row vectors of the third matrix are any two modulation symbols of four consecutive modulation symbols, and the other two row vectors of the third matrix are The element of is the conjugate of the other two modulation symbols among the four consecutive modulation symbols.

In a possible implementation design, N is equal to 2, and the third matrix includes any one of the following:

或

or

Among them, E = [1 1 1 1], s _4i , s _{4i + 1} , s _{4i + 2} and s _{4i + 3} represent 4 consecutive modulation symbols, i is a natural number starting from 1, and * represents conjugate.

In a possible implementation design, the second matrix is a matrix obtained by adjusting a position of an element in a column vector in a fifth matrix, and each row and each column in the second matrix includes a continuous 2N Modulation symbols

Wherein, the element in the i-th row and j-th column of the third matrix is denoted as M1 _ij , and the element in the i-th row and j-th column of the fourth matrix is denoted as M2 _ij , then the element in the i-th row and j-th column of the fifth matrix is denoted M3 _ij and M3 _ij = M1 _ij × M2 _ij , or the elements in the i-th row and j-th column of the sixth matrix are represented as M4 _ij and M4 _ij = M1 _ij × M2 _ij , and the fifth matrix Any two columns in the sixth matrix are obtained by conjugation; i and j are integers of 1 to 2N.

In a possible implementation design, the m-th element of the first vector is represented as V1 _m , the m-th element of a second vector corresponding to the first vector is represented as V2 _m , and the first vector The mth element of the corresponding second vector is represented as V3 _m , where m is an integer from 1 to 2N, then when m is taken from the first subset of 1 to 2N, V2 _m = V1 _m and V3 _m = 0, When m takes the second subset of 1 to 2N, V2 _m = 0 and V3 _m = V1 _m ; wherein the intersection of the first subset and the second subset is an empty set, and the first subset The union of the set and the second subset is an integer of 1 to 2N, and the number of non-zero elements of the two second vectors corresponding to the first vector are both equal to N.

The communication device provided in this embodiment may be used for the technical solution on the second communication device side in the embodiment shown in FIG. 2. The implementation principles and technical effects are similar, and details are not described herein again.

FIG. 7 is a schematic structural diagram of a chip according to an embodiment of the present application. As shown in FIG. 7, the chip includes: a processor 701, configured to execute a method on a first terminal device side of the method embodiment shown in FIG. 2.

In a possible implementation manner, the chip further includes: a memory 702;

A memory 701, configured to store instructions;

The processor 702 is specifically configured to call an instruction stored in the processor to execute the method on the first terminal device side of the method embodiment shown in FIG. 2.

FIG. 8 is a schematic structural diagram of a chip according to another embodiment of the present application. As shown in FIG. 8, the chip includes: a processor 801, configured to execute a method on a second terminal device side of the method embodiment shown in FIG. 2.

In a possible implementation manner, the chip further includes: a memory 802;

A memory 801, configured to store instructions;

The processor 802 is specifically configured to call an instruction stored in the processor to execute the method on the second terminal device side of the method embodiment shown in FIG. 2.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions according to the present application are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be from a website site, computer, server, or data center Transmission by wire (for example, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (for example, infrared, wireless, microwave, etc.) to another website site, computer, server, or data center. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, and the like that includes one or more available medium integration. The available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (Solid State Disk (SSD)), and the like.

Claims (30)

A communication method, characterized in that it is applied to a first terminal device, the first terminal device includes 4N antenna ports, the 4N antenna ports are divided into 2N antenna port pairs, and N is a positive integer greater than 1. The method includes: When the first terminal device determines to send information to the second terminal device through a side chain, it obtains a target codebook, where the target codebook is a codebook obtained according to a first matrix, and the first matrix is obtained according to a second matrix. A matrix for mapping consecutive 2N modulation symbols to each antenna port; wherein the second matrix is a 2N × 2N matrix with a rank equal to 2N, the second matrix includes 2N first vectors, and the 2N First vectors correspond one-to-one to the 2N antenna ports, the first matrix includes 4N second vectors, the 4N second vectors correspond one-to-one to the 4N antenna ports, each second The vector includes 2N elements, and every two second vectors correspond to a first vector; The first terminal device encodes the information according to the target codebook, and sends the encoded information to the second terminal device through a side chain. The method according to claim 1, wherein the second matrix is a matrix obtained according to a third matrix and a fourth matrix; The third matrix is a 2N × 2N matrix determined according to consecutive 2N modulation symbols; The fourth matrix is a 2N × 2N matrix composed of 1 and -1 with a rank of 2N, and any two row vectors are orthogonal vectors. The method according to claim 2, characterized in that N is equal to 2, and elements of any two column vectors of the third matrix are any two modulation symbols among four consecutive modulation symbols, and The elements of the other two column vectors are the conjugates of the other two modulation symbols among the four consecutive modulation symbols. The method according to claim 3, wherein N is equal to 2, and the third matrix includes any one of the following:

or

among them,

s _4i , s _{4i + 1} , s _{4i + 2} and s _{4i + 3} represent 4 consecutive modulation symbols, and * represents taking conjugate. The method according to claim 3 or 4, wherein the second matrix is a matrix obtained by adjusting position of elements in a row vector in a fifth matrix, and each row and each row in the second matrix The columns each contain consecutive 2N modulation symbols; Wherein, the element in the i-th row and j-th column of the third matrix is denoted as M1 _ij , and the element in the i-th row and j-th column of the fourth matrix is denoted as M2 _ij , then the element in the i-th row and j-th column of the fifth matrix is denoted M3 _ij and M3 _ij = M1 _ij × M2 _ij , or the elements in the i-th row and j-th column of the sixth matrix are represented as M4 _ij and M4 _ij = M1 _ij × M2 _ij , and the fifth matrix Any two rows in the sixth matrix are obtained by conjugate; i and j are integers of 1 to 2N. The method according to claim 2, characterized in that N is equal to 2, and elements of any two row vectors of the third matrix are any two modulation symbols among four consecutive modulation symbols, and The elements of the other two rows of vectors are the conjugates of the other two modulation symbols among the four consecutive modulation symbols. The method according to claim 6, wherein N is equal to 2, and the third matrix includes any one of the following:

or

Among them, E = [1 1 1 1], s _4i , s _{4i + 1} , s _{4i + 2} and s _{4i + 3} represent 4 consecutive modulation symbols, i is a natural number starting from 1, and _* represents conjugate. The method according to claim 6 or 7, wherein the second matrix is a matrix obtained by adjusting a position of an element in a column vector in the fifth matrix, and each row and each row in the second matrix The columns each contain consecutive 2N modulation symbols; Wherein, the element in the i-th row and j-th column of the third matrix is denoted as M1 _ij , and the element in the i-th row and j-th column of the fourth matrix is denoted as M2 _ij , then the element in the i-th row and j-th column of the fifth matrix is denoted M3 _ij and M3 _ij = M1 _ij × M2 _ij , or the elements in the i-th row and j-th column of the sixth matrix are represented as M4 _ij and M4 _ij = M1 _ij × M2 _ij , and the fifth matrix Any two columns in the sixth matrix are obtained by conjugation; i and j are integers of 1 to 2N. The method according to any one of claims 1 to 8, wherein the m-th element of the first vector is represented as V1 _m , and the m-th element of a second vector corresponding to the first vector is represented as V2 _m , the m-th element of another second vector corresponding to the first vector is represented as V3 _m , m is an integer from 1 to 2N, then when m is taken from the first subset of 1 to 2N, V2 _m = V1 _m and V3 _m = 0, when m takes the second subset of 1 to 2N, V2 _m = 0 and V3 _m = V1 _m ; wherein the intersection of the first subset and the second subset It is an empty set, and the union of the first subset and the second subset is an integer from 1 to 2N, and the number of non-zero elements of the two second vectors corresponding to the first vector is equal to N. A communication method, characterized in that it is applied to a second terminal device, the second terminal device includes 4N antenna ports, the 4N antenna ports are divided into 2N antenna port pairs, and N is a positive integer greater than 1. The method includes: When the second terminal device determines to receive information from the first terminal device through the side chain, it obtains a target codebook. The target codebook is a codebook obtained according to a first matrix, and the first matrix is obtained according to a second matrix. Matrix for mapping consecutive 2N modulation symbols to each antenna port; wherein the second matrix is a 2N × 2N matrix having a rank equal to N, the second matrix includes N first vectors, and the N First vectors correspond one-to-one to the N antenna ports, the first matrix includes 2N second vectors, the 2N second vectors correspond one-to-one to the 2N antenna ports, each second The vector includes 2N elements, and every two second vectors correspond to a first vector; The second terminal device demodulates information received from the first terminal device through a side chain according to the target codebook. The method according to claim 10, wherein the second matrix is a matrix obtained according to a third matrix and a fourth matrix; The third matrix is a 2N × 2N matrix determined according to consecutive 2N modulation symbols; The fourth matrix is a 2N × 2N matrix composed of 1 and -1 with a rank of 2N, and any two row vectors are orthogonal vectors. The method according to claim 11, characterized in that N is equal to 2, and elements of any two column vectors of the third matrix are any two modulation symbols among four consecutive modulation symbols, and The elements of the other two column vectors are the conjugates of the other two modulation symbols among the four consecutive modulation symbols. The method according to claim 12, wherein N is equal to 2, and the third matrix includes any one of the following:

or

among them,

s _4i , s _{4i + 1} , s _{4i + 2} and s _{4i + 3} represent 4 consecutive modulation symbols, and _* represents conjugate. The method according to claim 12 or 13, wherein the second matrix is a matrix obtained by adjusting position of elements in a row vector in the fifth matrix, and each row and each row in the second matrix The columns each contain consecutive 2N modulation symbols; Wherein, the element in the i-th row and j-th column of the third matrix is denoted as M1 _ij , and the element in the i-th row and j-th column of the fourth matrix is denoted as M2 _ij , then the element in the i-th row and j-th column of the fifth matrix is denoted M3 _ij and M3 _ij = M1 _ij × M2 _ij , or the elements in the i-th row and j-th column of the sixth matrix are represented as M4 _ij and M4 _ij = M1 _ij × M2 _ij , and the fifth matrix Any two rows in the sixth matrix are obtained by conjugate; i and j are integers of 1 to 2N. The method according to claim 11, characterized in that N is equal to 2, and elements of any two row vectors of the third matrix are any two modulation symbols among 4 consecutive modulation symbols, and The elements of the other two rows of vectors are the conjugates of the other two modulation symbols among the four consecutive modulation symbols. The method according to claim 15, wherein N is equal to 2, and the third matrix includes any one of the following:

or

Among them, E = [1 1 1 1], s _4i , s _{4i + 1} , s _{4i + 2} and s _{4i + 3} represent 4 consecutive modulation symbols, i is a natural number starting from 1, and * represents conjugate. The method according to claim 15 or 16, wherein the second matrix is a matrix obtained by adjusting a position of an element in a column vector in a fifth matrix, and each row and each row in the second matrix The columns each contain consecutive 2N modulation symbols; Wherein, the element in the i-th row and j-th column of the third matrix is denoted as M1 _ij , and the element in the i-th row and j-th column of the fourth matrix is denoted as M2 _ij , then the element in the i-th row and j-th column of the fifth matrix is denoted M3 _ij and M3 _ij = M1 _ij × M2 _ij , or the elements in the i-th row and j-th column of the sixth matrix are represented as M4 _ij and M4 _ij = M1 _ij × M2 _ij , and the fifth matrix Any two columns in the sixth matrix are obtained by conjugation; i and j are integers of 1 to 2N. The method according to any one of claims 10 to 17, wherein the m-th element of the first vector is represented as V1 _m , and the m-th element of a second vector corresponding to the first vector is represented as V2 _m , the m-th element of another second vector corresponding to the first vector is represented as V3 _m , m is an integer from 1 to 2N, then when m is taken from the first subset of 1 to 2N, V2 _m = V1 _m and V3 _m = 0, when m takes the second subset of 1 to 2N, V2 _m = 0 and V3 _m = V1 _m ; wherein the intersection of the first subset and the second subset Is an empty set, and the union of the first subset and the second subset is an integer from 1 to 2N, and the number of non-zero elements of the two second vectors corresponding to the first vector is equal to N. A communication device is characterized in that it is applied to a first terminal device, the first terminal device includes 4N antenna ports, the 4N antenna ports are divided into 2N antenna port pairs, and N is a positive integer greater than 1. , The device includes: A processing unit, configured to obtain a target codebook when sending information to a second terminal device through a side chain, where the target codebook is a codebook obtained according to a first matrix, and the first matrix is obtained according to a second matrix A matrix for mapping consecutive 2N modulation symbols to each antenna port; wherein the second matrix is a 2N × 2N matrix having a rank equal to 2N, the second matrix includes 2N first vectors, and the 2N A first vector corresponds one-to-one with the 2N antenna ports, the first matrix includes 4N second vectors, the 4N second vectors correspond one-to-one with the 4N antenna ports, and each second vector Including 2N elements, and every two second vectors correspond to a first vector; A sending unit is configured to encode the information according to the target codebook, and send the encoded information to a second terminal device through a side chain. A communication device is characterized in that it is applied to a second terminal device, the second terminal device includes 4N antenna ports, the 4N antenna ports are divided into 2N antenna port pairs, and N is a positive integer greater than 1. , The device includes: A determining unit, configured to obtain a target codebook when receiving information from a first terminal device through a side chain, where the target codebook is a codebook obtained according to a first matrix, and the first matrix is obtained according to a second matrix A matrix for mapping consecutive 2N modulation symbols to each antenna port; wherein the second matrix is a 2N × 2N matrix having a rank equal to N, and the second matrix includes N first vectors, and the N A first vector corresponds one-to-one to the N antenna ports, the first matrix includes 2N second vectors, the 2N second vectors correspond one-to-one to the 2N antenna ports, each second vector Including 2N elements, and every two second vectors correspond to a first vector; A demodulation unit is configured to demodulate information received from the first terminal device through a side chain according to the target codebook. A communication device is characterized in that it is applied to a first terminal device, the first terminal device includes 4N antenna ports, the 4N antenna ports are divided into 2N antenna port pairs, and N is a positive integer greater than 1. The device includes: a processor and a transmitter; The processor is configured to obtain a target codebook when sending information to a second terminal device through a side chain, where the target codebook is a codebook obtained according to a first matrix, and the first matrix is based on a second matrix. The obtained matrix for mapping consecutive 2N modulation symbols to each antenna port; wherein the second matrix is a 2N × 2N matrix having a rank equal to 2N, and the second matrix includes 2N first vectors, where 2N first vectors correspond one-to-one with the 2N antenna ports, the first matrix includes 4N second vectors, and the 4N second vectors correspond one-to-one with the 4N antenna ports. The two vectors include 2N elements, and every two second vectors correspond to a first vector; The transmitter is configured to encode the information according to the target codebook, and send the encoded information to a second terminal device through a side chain. A communication device is characterized in that it is applied to a second terminal device, the second terminal device includes 4N antenna ports, the 4N antenna ports are divided into 2N antenna port pairs, and N is a positive integer greater than 1. The device includes: a processor and a receiver; The processor is configured to obtain a target codebook when receiving information from a first terminal device through a side chain, where the target codebook is a codebook obtained according to a first matrix, and the first matrix is based on a second matrix. The obtained matrix for mapping consecutive 2N modulation symbols to each antenna port; wherein the second matrix is a 2N × 2N matrix having a rank equal to N, and the second matrix includes N first vectors, where The N first vectors correspond one-to-one with the N antenna ports, the first matrix includes 2N second vectors, the 2N second vectors correspond one-to-one with the 2N antenna ports, and each The two vectors include 2N elements, and every two second vectors correspond to a first vector; The processor is configured to demodulate information received by the receiver from the first terminal device through a side chain according to the target codebook. The device according to any one of claims 19 to 22, wherein the second matrix is a matrix obtained according to a third matrix and a fourth matrix; The third matrix is a 2N × 2N matrix determined according to consecutive 2N modulation symbols; The fourth matrix is a 2N × 2N matrix composed of 1 and -1 with a rank of 2N, and any two row vectors are orthogonal vectors. The apparatus according to claim 23, wherein N is equal to 2, and elements of any two column vectors of the third matrix are any two modulation symbols among four consecutive modulation symbols, and The elements of the other two column vectors are the conjugates of the other two modulation symbols among the four consecutive modulation symbols. The apparatus according to claim 24, wherein N is equal to 2, and the third matrix includes any one of the following:

or

among them,

s _4i , s _{4i + 1} , s _{4i + 2} and s _{4i + 3} represent 4 consecutive modulation symbols, and * represents taking conjugate. The device according to claim 24 or 25, wherein the second matrix is a matrix obtained by adjusting position of elements in a row vector in a fifth matrix, and each row and each row in the second matrix The columns each contain consecutive 2N modulation symbols; Wherein, the element in the i-th row and j-th column of the third matrix is denoted as M1 _ij , and the element in the i-th row and j-th column of the fourth matrix is denoted as M2 _ij , then the element in the i-th row and j-th column of the fifth matrix is denoted M3 _ij and M3 _ij = M1 _ij × M2 _ij , or the elements in the i-th row and j-th column of the sixth matrix are represented as M4 _ij and M4 _ij = M1 _ij × M2 _ij , and the fifth matrix Any two rows in the sixth matrix are obtained by conjugate; i and j are integers of 1 to 2N. The device according to claim 23, wherein N is equal to 2, and elements of any two row vectors of the third matrix are any two modulation symbols among four consecutive modulation symbols, and The elements of the other two rows of vectors are the conjugates of the other two modulation symbols among the four consecutive modulation symbols. The apparatus according to claim 27, wherein N is equal to 2, and the third matrix includes any one of the following:

or

Among them, E = [1 1 1 1], s _4i , s _{4i + 1} , s _{4i + 2} and s _{4i + 3} represent 4 consecutive modulation symbols, i is a natural number starting from 1, and _* represents conjugate. The device according to claim 27 or 28, wherein the second matrix is a matrix obtained by adjusting a position of an element in a column vector in a fifth matrix, and each row and each row in the second matrix The columns each contain consecutive 2N modulation symbols; Wherein, the element in the i-th row and j-th column of the third matrix is denoted as M1 _ij , and the element in the i-th row and j-th column of the fourth matrix is denoted as M2 _ij , then the element in the i-th row and j-th column of the fifth matrix is denoted M3 _ij and M3 _ij = M1 _ij × M2 _ij , or the elements in the i-th row and j-th column of the sixth matrix are represented as M4 _ij and M4 _ij = M1 _ij × M2 _ij , and the fifth matrix Any two columns in the sixth matrix are obtained by conjugation; i and j are integers of 1 to 2N. The device according to any one of claims 19 to 29, wherein the m-th element of the first vector is represented as V1 _m , and the m-th element of a second vector corresponding to the first vector is represented as V2 _m , the m-th element of another second vector corresponding to the first vector is represented as V3 _m , m is an integer from 1 to 2N, then when m is taken from the first subset of 1 to 2N, V2 _m = V1 _m and V3 _m = 0, when m takes the second subset of 1 to 2N, V2 _m = 0 and V3 _m = V1 _m ; wherein the intersection of the first subset and the second subset It is an empty set, and the union of the first subset and the second subset is an integer from 1 to 2N, and the number of non-zero elements of the two second vectors corresponding to the first vector is equal to N.

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