CN106803819A - A kind of method for transmitting information, device and system - Google Patents

Abstract

The present invention provides a method for transmitting information, wherein, the transmitting end performs the following operations: a. Perform cyclic shift on the initial sequence according to the information to be sent, and use the initial sequence and all obtained after cyclic shift Sequences are superimposed to generate the final sequence that needs to be sent to the receiving end; b. Send the final sequence to the receiving end; the receiving end performs the following operations: A. Receive the final sequence from the transmitting end; B. By sending the final sequence Correlating with the initial sequence to obtain the information carried in the final sequence. According to the solution of the present invention, the information can be represented by the position of the peak of the sequence.

Description

A method, device and system for transmitting information

technical field

The present invention relates to the field of communication technology, in particular to a method, device and system for transmitting information.

Background technique

In the prior art, in order to detect and determine the interference from the base station, the sounding sequence is designed, such as the GCL sequence with ideal periodic autocorrelation characteristics, excellent cross-correlation characteristics and low peak-to-average power ratio characteristics; however, the sounding sequence can only It is used for detection, such as realizing the synchronous detection function by judging whether the peak value exceeds the threshold, but it does not have the function of carrying information. If information needs to be transmitted during the detection process (such as the latitude and longitude of the base station, etc.), it must be obtained through other means. The information is additionally transmitted, such as using the existing QPSK modulation method to carry the information through the phase, and the like.

Contents of the invention

The object of the present invention is to provide a method, device and system for transmitting information.

According to one aspect of the present invention, there is provided a method for transmitting information, wherein the method comprises the following steps:

a. Perform cyclic shift on the initial sequence according to the information to be sent, and generate the final sequence to be sent to the receiving end by superimposing the initial sequence and all the sequences obtained through the cyclic shift;

b. Sending the final sequence to the receiving end.

According to another aspect of the present invention, a method for transmitting information is also provided, wherein the method includes the following steps:

A. Receive the final sequence from the transmitter;

B. Obtaining the information carried in the final sequence by correlating the final sequence with the initial sequence.

According to another aspect of the present invention, there is also provided a first device for transmitting information, wherein the first device includes the following devices:

The first generating device is configured to cyclically shift the initial sequence according to the information to be sent, and generate a final sequence to be sent to the receiving end by superimposing the initial sequence and all sequences obtained through the cyclic shift;

The sending device is used to send the final sequence to the receiving end.

According to another aspect of the present invention, a second device for transmitting information is also provided, wherein the second device includes the following devices:

a receiving device, configured to receive the final sequence from the transmitting end;

The second obtaining means is used to obtain the information carried in the final sequence by correlating the final sequence with the initial sequence.

According to another aspect of the present invention, a system for transmitting information is also provided, including a transmitting end and a receiving end, the transmitting end includes the first device described in the present invention, and the receiving end includes the device described in the present invention. the second device.

Compared with the prior art, the present invention has the following advantages: it provides a new way of transmitting information, and the information can be represented by the position of the peak value of the sequence; the transmitting end can cyclically shift the initial sequence according to the information to be sent , and by superimposing the initial sequence and all the sequences obtained through cyclic shifting, the final sequence that needs to be sent to the receiving end is generated, and the final sequence is transmitted to the receiving end. The receiving end can combine the received final sequence with the initial The sequence is correlated to obtain the information carried in the final sequence, thereby realizing the transmission of the information to be sent.

Description of drawings

Other characteristics, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

FIG. 1 is a schematic flowchart of a method for transmitting information according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a system for transmitting information according to an embodiment of the present invention;

Fig. 3 is a schematic diagram of generating a final sequence by cyclically shifting an initial sequence according to an example of the present invention;

Fig. 4 is a simulation schematic diagram of decoding based on the final sequence shown in Fig. 3 of an example of the present invention;

Fig. 5 is a schematic diagram of the process of sending the final sequence to the receiving end in the transmitting end in an example of the present invention;

FIG. 6 is a schematic diagram of a simulation of decoding the final sequence carrying multi-layer information to obtain the first-layer information in an example of the present invention;

FIG. 7 is a schematic diagram of a simulation of decoding the final sequence shown in FIG. 6 to obtain second-layer information;

Fig. 8 is a schematic diagram of the bit error rate of the AWGN channel when the final sequence of an example of the present invention only carries one layer of information;

Fig. 9 is a schematic diagram of the bit error rate of the AWGN channel when the final sequence of an example of the present invention carries two layers of information;

FIG. 10 is a schematic diagram of the bit error rate of the AWGN channel when the final sequence of an example of the present invention carries three layers of information;

Fig. 11 is a schematic diagram of the bit error rate of the AWGN channel when the final sequence of an example of the present invention carries four layers of information;

FIG. 12 is a schematic diagram of the bit error rate of the AWGN channel when the final sequence carries six layers of information in an example of the present invention.

The same or similar reference numerals in the drawings represent the same or similar components.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Fig. 1 is a schematic flowchart of a method for transmitting information according to an embodiment of the present invention.

Wherein, the method of this embodiment is mainly realized through the transmitting end and the receiving end; wherein, the transmitting end includes any device having a transmitting function in the communication system, such as a base station, user equipment (such as a tablet computer, a smart phone, a PDA, etc.) ), etc.; the receiving end includes any device capable of receiving functions in the communication system, such as a base station, user equipment, etc.; preferably, the communication system is an LTE system, and more preferably, the communication system is an LTE TDD system.

It should be noted that the transmitting end, receiving end, and communication system are only examples, and other existing or future possible transmitting end, receiving end, and communication systems, if applicable to the present invention, should also be included in the protection of the present invention. scope, and is incorporated herein by reference.

The method according to this embodiment includes step S101, step S102, step S103 and step S104.

In step S101, the transmitting end cyclically shifts the initial sequence according to the information to be sent, and generates the final sequence to be sent to the receiving end by superimposing the initial sequence and all the sequences obtained after cyclic shifting.

Wherein, the initial sequence has excellent auto-correlation and cross-correlation. Preferably, the initial sequence is a GCL (Generalized Chirp-Like, generalized linear frequency modulation) sequence, wherein the GCL sequence has ideal periodic autocorrelation characteristics, excellent cross-correlation characteristics (cross-correlation value is close to zero) and low peak-to-average power ratio characteristics, the GCL sequence is defined as:

or defined as:

Wherein, N is the length of the GCL sequence, and u is the root of the GCL sequence.

Wherein, the length of the initial sequence may be predetermined, or may be randomly changed based on content information, or determined based on content information and predetermined boundary rules. It should be noted that the final sequence has the same characteristics and length as the initial sequence.

It should be noted that the initial sequence is agreed between the transmitting end and the receiving end, that is, the receiving end knows which one or more initial sequences are used by the transmitting end.

Wherein, the information to be sent includes the content information (such as the location information of the base station, etc.) that the transmitting end needs to transmit to the receiving end; preferably, the content information can be the original information obtained by the transmitting end, or, based on the The encoded information obtained by encoding the original information (for example, "1" is encoded as "1111", "0" is encoded as "0000", etc., the use of encoded information can reduce the bit error rate, and is suitable for situations that require a lower bit error rate ). Preferably, the information to be sent further includes boundary information, and the boundary information is used to indicate the boundary of the content information, so as to ensure that the receiving end can obtain accurate content information.

Preferably, before step S101, the transmitter obtains the information to be sent according to predetermined boundary rules and content information to be sent.

Wherein, the predetermined boundary rules include any predetermined rules for setting boundaries. For example, the predetermined boundary rule indicates that a boundary "1" is set before the first bit of the content information, and another example is that the predetermined boundary rule indicates that a boundary "1" is set before the first bit and after the last bit of the content information (that is, both sides of the content information), so as to Avoid ambiguity caused by "0" at the first bit and/or "0" at the last bit of the content information, thereby avoiding decoding errors at the receiving end.

As an example, the predetermined boundary rule indicates that the boundary "1" is set before the first bit of the content information, and the content information to be sent by the transmitting end is "011010", then the transmitting end, according to the predetermined boundary rule and the content information, in the content information Set the boundary "1" before the first bit to get the message "1011010" to be sent. It should be noted that when the predetermined boundary rule indicates that the boundary is only set on one side of the content information, the length of the information to be sent is a predetermined length (when the information to be sent is multi-layer information, the length of each layer of information is a predetermined length. Length) to facilitate correct decoding by the receiving end (for example, for the information obtained by decoding, the receiving end will add "0" to the side of the information where no boundary is set according to the predetermined length, so as to obtain a correct decoding result).

As another example, the predetermined boundary rule indicates that a boundary of "1" is set on both sides of the content information, and the content information to be sent by the transmitting end is "011010", then the transmitting end, according to the predetermined boundary rule and the content information, in the content information Set the boundary "1" before the first bit of the message to obtain the message "10110101" to be sent. It should be noted that when the length of the initial sequence is N, and the predetermined boundary rule indicates that the boundary "1" is set on both sides of the content information, the maximum length of the content information is N-1-2; for example, N=1023, Then the maximum length of content information is 1020, that is, there are 2^1020 kinds of content information that may be represented.

It should be noted that when the predetermined boundary rule indicates that the boundary "1" is set on both sides of the content information, the length of the information to be sent can be set arbitrarily. If the length of the initial sequence is N, the maximum length of the content information is N -1-2; For example, N=1023, the final sequence generated based on the initial information can be used to represent 2^1020 possible content information

It should be noted that when the transmitting end needs to send a plurality of content information to the receiving end, for each content information, the transmitting end obtains the layer of information corresponding to the content information to be sent according to the predetermined boundary rules and the content information . For example, the content information to be sent includes "011010" and "101001", and the predetermined boundary rule indicates that the boundary "1" is set on both sides of the content information; for the content information "011010", the transmitting end , generate the layer information "10110101" corresponding to the content information; for the content information "101001", the transmitter generates the layer information "11010011" corresponding to the content information according to the predetermined boundary rules and the content information.

Specifically, when the information to be sent includes only one layer of information, the transmitter performs cyclic shifts on the initial sequence corresponding to the information according to the information to be sent, and obtains a new sequence for each cyclic shift, completing all After the cyclic shift operation, the transmitting end superimposes the initial sequence with all the sequences obtained by cyclic shifting the initial sequence to generate a final sequence to be sent to the receiving end, and the final sequence is used to carry the information to be sent.

As an example, the information to be sent is "10110101", and Fig. 3 shows a schematic diagram of cyclically shifting the initial sequence according to the information to be sent to generate the final sequence, where seq1 is the initial sequence; in step S101, According to the position of "1" in the message "10110101" to be sent, the transmitting end shifts seq1 by 2 bits to obtain seq2 shown in Figure 3, shifts seq1 by 3 bits to obtain seq3 shown in Figure 3, and shifts seq1 by 5 bits Get seq4 shown in Figure 3, shift seq1 by 7 bits to get seq5 shown in Figure 3; after that, the transmitter superimposes seq1, seq2, seq3, seq4, seq5 to get the final sequence seq6 shown in Figure 3.

As a preferred solution of step S101, the information to be sent includes multi-layer information, and the step S101 further includes step S1011 and step S1012.

In step S1011, for each layer of information in the multi-layer information, the transmitting end cyclically shifts the initial sequence corresponding to the layer information according to the layer information, and by shifting the initial sequence corresponding to the layer information and all the sequences obtained through the cyclic shift are superimposed to generate a sequence for carrying the information of the layer.

Among them, the root of the initial sequence corresponding to each layer of information is different, for example, the information to be sent includes two layers of information: "10110101" and "11010011", the root of the initial sequence seq11 corresponding to "10110101" is u1," The root of the initial sequence seq21 corresponding to 11010011" is u2, and u1 is not equal to u2.

As an example of step S1011, the information to be sent includes two layers of information: "10110101" and "11010011". For the first layer of information "10110101", the transmitting end matches "10110101" with "10110101" according to the position of "1" in "10110101" The corresponding initial sequence seq11 is cyclically shifted, and the sequence seqL1 used to carry "10110101" is generated by superimposing seq11 and all sequences obtained by cyclically shifting seq11; for the second layer information "11010011" , the transmitter cyclically shifts the initial sequence seq21 corresponding to "11010011" according to "11010011", and superimposes seq21 and all the sequences obtained by cyclically shifting seq21 to generate a sequence for carrying "11010011" Sequence seqL2.

In step S1012, the transmitting end superimposes the generated multiple sequences respectively used to carry the information of each layer to generate a final sequence to be sent to the receiving end.

For example, the information to be sent includes two layers of information: "10110101" and "11010011". For the first layer of information "10110101", in step S1011, the transmitter generates a sequence seqL1 for carrying "10110101" and a sequence for carrying The sequence seqL1 of "11010011"; in step S1012, the transmitting end superimposes seqL1 and seqL2 to generate the final sequence seqL that needs to be sent to the receiving end, and the final sequence seqL carries the above two layers of information.

It should be noted that this preferred solution supports the situation of multiple users, and can send information for multiple users at the same time; for example, the information to be sent includes multiple layers of information, where each layer of information corresponds to one user.

It should be noted that the above examples are only to better illustrate the technical solutions of the present invention, rather than limiting the present invention. Those skilled in the art should understand that any initial sequence is cyclically shifted according to the information to be sent, and by The implementation of superimposing the initial sequence and all the sequences obtained through cyclic shift to generate the final sequence to be sent to the receiving end shall be included in the scope of the present invention.

It should be noted that in the prior art, the sounding sequence is used to detect and determine interference from the base station. According to 3GPP regulations, the frequency accuracy of the base station is within ±0.05ppm, and the maximum error between two base stations is 0.1ppm. For example, for a 2.6GHz communication system, the CFO is 260Hz or the subcarrier spacing is 0.0173; through simulation, within [-4.5, +4.5] KHz, or the normalized offset of the subcarrier spacing is in [-0.3, 0.3] When , the detector is insensitive to CFO, therefore, it is generally impossible for the detection sequence in the prior art to have an integer frequency offset. However, in this embodiment, since the operation in step S101 is equivalent to encoding the information to be transmitted by shifting the initial sequence by integer bits, it allows an integer CFO (carrier frequency offset, carrier frequency offset), the integer CFOs need no revision.

In step S102, the transmitting end sends the final sequence to the receiving end.

For example, the transmitting end is a base station, the receiving end is a user equipment, and the base station sends the final sequence generated in step S101 to the user equipment.

As a preferred solution of step S102, the transmitting end sends the final sequence to the receiving end by mapping the final sequence to even or odd subcarriers in the frequency domain.

For example, the transmitter maps the generated final sequence to even subcarriers in the frequency domain (that is, subcarriers with even numbers), while the odd subcarriers (that is, subcarriers with odd numbers) are empty, so that the final Sequence is sent to the receiver.

It should be noted that, based on this preferred scheme, after the transmitter maps the final sequence to even or odd subcarriers in the frequency domain, fast Fourier is performed on the mapped OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) symbols. Inverse Fast Fourier Transform (IFFT, Inverse Fast Fourier Transform) can generate repeated continuous waves in the time domain, which can facilitate synchronous detection at the receiving end while transmitting information.

As an example, FIG. 5 is a schematic diagram of the process of sending the final sequence to the receiving end at the transmitting end in an example of the present invention, wherein the final sequence is mapped to even-numbered subcarriers in the frequency domain (that is, the black subcarriers shown in FIG. 5 subcarriers), and the odd subcarriers (that is, the blank subcarriers shown in Figure 5) are empty, the transmitter performs IFFT on the OFDM symbols generated after mapping to convert from the frequency domain to the time domain, and then generates The time-domain signal of the CP is inserted into a cyclic prefix (CP, Cyclic Prefix), and then the waveform shown in Figure 5 can be generated, wherein, after the waveform corresponding to the cyclic prefix, a repeated continuous wave is generated for synchronous detection.

It should be noted that the above examples are only to better illustrate the technical solution of the present invention, rather than limiting the present invention. Those skilled in the art should understand that any implementation of sending the final sequence to the receiving end should be included within the scope of the present invention.

In step S103, the receiving end receives the final sequence from the transmitting end.

In step S104, the receiving end obtains the information carried in the final sequence by correlating the final sequence with the initial sequence.

Specifically, the receiving end correlates the final sequence with the initial sequence, and obtains the information carried in the final sequence based on the carrier position where the correlation peak is located.

It should be noted that, at the receiving end, after both the time domain and the frequency domain are synchronized, the received final sequence is correlated with the agreed local initial sequence (preferably, correlation is performed when there is almost no multipath effect), and then , the receiving end obtains the information carried in the final sequence according to the generated peak value.

Specifically, the receiver obtains the information carried in the final sequence by correlating the final sequence with the initial sequence, including but not limited to:

1) The final sequence only carries one layer of information; the receiving end obtains the information carried in the final sequence by autocorrelating the final sequence with the initial sequence.

For example, the final sequence only carries one layer of information, and the receiver autocorrelates the final sequence with the initial sequence. The simulation results are shown in Figure 4, where the horizontal axis represents the carrier, and the vertical axis represents the amplitude after correlation, based on Figure 4 The carrier positions of the five peaks (that is, the maximum amplitude values) shown in , can determine the information carried in the final sequence as "10110101", where the carrier positions of the peaks (0th, 2nd, The information corresponding to the 3rd, 5th, and 7th) is "1", and the information corresponding to the other carrier positions is "0". It should be noted that Fig. 4 is an enlarged view of the simulation result, and the peak value obtained by the actual simulation should reach 1.

2) The final sequence carries multi-layer information; the receiving end obtains the multi-layer information carried in the final sequence by correlating the final sequence with multiple initial sequences.

Specifically, the receiving end correlates the final sequence with multiple initial sequences in the form of sequential scanning to obtain the multi-layer information carried in the final sequence. Among them, in the process of correlation, autocorrelation is performed between sequences with the same root, and cross-correlation is performed between sequences with different roots. It should be noted that the receiving end obtains a layer of information carried in the final sequence based on the result of autocorrelation between the final sequence and an initial sequence.

As an example, the final sequence carries two layers of information, and the receiver correlates the final sequence with the two agreed initial sequences. The simulation results are shown in Figures 6 and 7, where the horizontal axis represents the carrier, and the vertical axis represents Amplitude after correlation; based on the carrier positions where the five peaks are shown in Figure 6, it can be determined that the first layer information carried in the final sequence is "10110101", where the carrier positions where the peaks are (0th, ground 2, 3rd, 5th, 7th), the corresponding information is "1", and the information corresponding to the other carrier positions is "0"; based on the carrier positions of the five peaks shown in Figure 7, it can be determined The second layer information carried in the final sequence is "11010011", where the information corresponding to the carrier position (0th, 1st, 3rd, 6th, 7th) where the peak is located is "1" , and the information corresponding to the remaining carrier positions is "0". It should be noted that Fig. 6 and Fig. 7 are enlarged diagrams of simulation results, and the peak value obtained by actual simulation should reach 1. In addition, Fig. 6 and Fig. 7 also show the noise in the correlation process. It can be clearly seen from Fig. 6 and Fig. 7 that since the final sequence has excellent autocorrelation and cross-correlation, even if there is noise coverage, the The information carried by the final sequence can be accurately decoded.

It should be noted that, preferably, in step S104, when the length of the information carried in the final sequence is a predetermined length, and the information length determined by the receiving end based on the carrier position where the peak value obtained by correlation is less than the predetermined length, the receiving The end combines the predetermined length and predetermined boundary rules to determine the information carried in the final sequence; wherein, when the information carried in the final sequence is multi-layer information, the receiving end combines the predetermined length and predetermined boundary rules to determine the information carried in the final sequence information for each layer. For example, the predetermined boundary rule indicates that the boundary "1" is set before the first bit of the content information, and the predetermined length is 8 bits; in step S104, the information determined by the receiving end based on the carrier position where the peak value obtained by correlation is "101101" (the information Each bit is 1 bit), the receiving end adds "0" at the end of the determined information based on the predetermined length and predetermined boundary rules, and obtains the information carried by the final sequence as "10110100", so that the length of the information is predetermined length.

It should be noted that the above examples are only to better illustrate the technical solutions of the present invention, rather than limiting the present invention. Those skilled in the art should understand that any combination of the final sequence and the initial sequence to obtain the final The implementation of the information carried in the sequence shall be included in the scope of the present invention.

As a preferred solution of this embodiment, the method of this embodiment further includes the following step executed after step S104: the receiving end extracts content information from the obtained information according to predetermined boundary rules. Wherein, when the obtained information is multi-layer information, the receiving end extracts corresponding content information from each layer of information in the multi-layer information according to predetermined boundary rules.

As an example, the predetermined boundary rule indicates that the boundary "1" is set before the first bit of the content information. In step S104, the receiving end obtains the information carried in the final sequence as "10010100" based on the carrier position where the peak value obtained by correlation is located; after that , the receiving end removes the leading boundary “1” according to the predetermined boundary rule, so as to extract the content information “0010100” from the obtained information.

As another example, the predetermined boundary rule indicates that the boundary "1" is set on both sides of the content information. In step S104, the receiving end obtains the information carried in the final sequence based on the carrier position where the peak value obtained by correlation is "10110101" ; Afterwards, according to the predetermined boundary rule, the receiving end removes the boundary "1" on both sides to extract the content information "011010" from the obtained information.

As another example, the predetermined boundary rule indicates that a boundary "1" is set on both sides of the content information. In step S104, the receiving end obtains the final sequence by correlating the final sequence with the agreed two initial sequences. It carries the first layer information "10110101" and the second layer information "11010011". After that, for the first-level information "10110101", the receiving end removes the boundary "1" on both sides of the first-level information according to the predetermined boundary rule, so as to extract the content information "011010" from the first-level information; For the second-level information "11010011", the receiving end removes the boundary "1" on both sides of the second-level information according to the predetermined boundary rule, so as to extract the content information "101001" from the second-level information.

It should be noted that the above examples are only to better illustrate the technical solution of the present invention, rather than limit the present invention. Those skilled in the art should understand that any content extracted from the obtained information according to predetermined boundary rules The realization of information shall be included in the scope of the present invention.

What needs to be explained is that when the content information is encoded information obtained by encoding the original information at the transmitting end, the receiving end also needs to perform corresponding decoding operations on the encoded information, for example, the transmitting end encodes "1" into "1111 ", "0" is encoded as "0000", then the receiving end decodes "1111" in the content information as "1", and "0000" as "0".

It should be noted that the final sequence of the solution of this embodiment can carry multiple layers of information at the same time, and when the final sequence carries multiple layers of information at the same time, the bandwidth efficiency of the channel will be folded and increased. For example, the maximum bandwidth efficiency h of the channel is expressed as:

h＝m(N-3)/(B(T _CP +T _u ))

Among them, B represents the bandwidth, T _CP represents the cyclic prefix length in a short time, _Tu represents the OFDM symbol length in a short time, m is the joint length of multi-layer information, and N is the length of the final sequence.

Fig. 8 to Fig. 12 respectively show the schematic diagram of the bit error rate of AWGN (Additive White Gaussian Noise, additive white Gaussian noise) channel when the final sequence carries information of different layers, wherein, the horizontal axis represents the signal-to-noise ratio (SNR, Signal Noise Ratio), the vertical axis represents the bit error rate (BER, Bit Error Ratio). Fig. 8 is a schematic diagram of the bit error rate of the AWGN channel when the final sequence of an example only carries one layer of information, the bandwidth efficiency of the AWGN channel is 1.39bps/HZ, and the information of this layer is the geographical information (longitude and latitude) of the base station (length is 32bit), the final sequence is transmitted to the receiving end through the AWGN channel after OFDM modulation, the average bit error rate of the AWGN channel in this case exceeds one thousandth, compared with the uncoded BPSK system in the prior art, There is about 9dB gain. Figure 9 is a schematic diagram of the bit error rate of the AWGN channel when the final sequence of an example carries two layers of information, and the bandwidth efficiency of the AWGN channel is 2.78bps/HZ; Figure 10 is the error rate of the AWGN channel when the final sequence of an example carries three layers of information A schematic diagram of the code rate, the bandwidth efficiency of the AWGN channel is 4.17bps/HZ; Figure 11 is a schematic diagram of the bit error rate of the AWGN channel when the final sequence carries four-layer information of an example, the bandwidth efficiency of the AWGN channel is 5.56bps/HZ; 12 is a schematic diagram of the bit error rate of the AWGN channel when the final sequence carries six layers of information, and the bandwidth efficiency of the AWGN channel is 8.34bps/HZ.

According to the solution of this embodiment, a new way of transmitting information is provided, and the information can be represented by the position of the peak value of the sequence; the transmitting end can cyclically shift the initial sequence according to the information to be sent, and pass the initial sequence And all the sequences obtained by cyclic shift are superimposed to generate the final sequence that needs to be sent to the receiving end, and transmit the final sequence to the receiving end. The receiving end can obtain the obtained final sequence by correlating the received final sequence with the initial sequence. The information carried in the above final sequence realizes the transmission of the information to be sent; supports the transmission of single-user or multi-user information, such as the information to be sent can be multi-layer information, and each layer of information can correspond to different users; The final sequence of the transmission can also be used as a detection sequence to realize synchronous detection while transmitting information, that is, the final sequence can not only realize the detection function, but also have the function of carrying information; even in the case of noise coverage, it can be accurate can accurately parse out the information carried in the final sequence.

Fig. 2 is a schematic structural diagram of a system for transmitting information according to an embodiment of the present invention. The system includes a transmitting end and a receiving end; the transmitting end includes a first device, the first device includes a first generating device 1 and a sending device 2; the receiving end includes a second device, and the second device includes a receiving device 3 and the second obtaining means 4 .

The first generating device 1 at the transmitting end cyclically shifts the initial sequence according to the information to be sent, and generates the final sequence to be sent to the receiving end by superimposing the initial sequence and all sequences obtained through cyclic shifting.

Wherein, the initial sequence has excellent auto-correlation and cross-correlation. Preferably, the initial sequence is a GCL (Generalized Chirp-Like, generalized linear frequency modulation) sequence, wherein the GCL sequence has ideal periodic autocorrelation characteristics, excellent cross-correlation characteristics (cross-correlation value is close to zero) and low peak-to-average power ratio characteristics, the GCL sequence is defined as:

or defined as:

Wherein, N is the length of the GCL sequence, and u is the root of the GCL sequence.

Wherein, the length of the initial sequence may be predetermined, or may be randomly changed based on content information, or determined based on content information and predetermined boundary rules. It should be noted that the final sequence has the same characteristics and length as the initial sequence.

It should be noted that the initial sequence is agreed between the transmitting end and the receiving end, that is, the receiving end knows which one or more initial sequences are used by the transmitting end.

Wherein, the information to be sent includes the content information (such as the location information of the base station, etc.) that the transmitting end needs to transmit to the receiving end; preferably, the content information can be the original information obtained by the transmitting end, or, based on the The encoded information obtained by encoding the original information (for example, "1" is encoded as "1111", "0" is encoded as "0000", etc., the use of encoded information can reduce the bit error rate, and is suitable for situations that require a lower bit error rate ). Preferably, the information to be sent further includes boundary information, and the boundary information is used to indicate the boundary of the content information, so as to ensure that the receiving end can obtain accurate content information.

Preferably, the first device further includes a first obtaining device (not shown in the figure), and before the first generating device 1 performs an operation, the first obtaining device obtains the information to be sent according to predetermined boundary rules and content information to be sent .

Wherein, the predetermined boundary rules include any predetermined rules for setting boundaries. For example, the predetermined boundary rule indicates that a boundary "1" is set before the first bit of the content information, and another example is that the predetermined boundary rule indicates that a boundary "1" is set before the first bit and after the last bit of the content information (that is, both sides of the content information), so as to Avoid ambiguity caused by "0" at the first bit and/or "0" at the last bit of the content information, thereby avoiding decoding errors at the receiving end.

As an example, the predetermined boundary rule indicates that the boundary "1" is set before the first bit of the content information, and the content information to be sent by the transmitting end is "011010", then the first obtaining means, according to the predetermined boundary rule and the content information, in the content Set the boundary "1" before the first bit of the message to obtain the message "1011010" to be sent. It should be noted that when the predetermined boundary rule indicates that the boundary is only set on one side of the content information, the length of the information to be sent is a predetermined length (when the information to be sent is multi-layer information, the length of each layer of information is a predetermined length. Length) to facilitate correct decoding by the receiving end (for example, for the information obtained by decoding, the receiving end will add "0" to the side of the information where no boundary is set according to the predetermined length, so as to obtain a correct decoding result).

As another example, the predetermined boundary rule indicates that the boundary "1" is set on both sides of the content information, and the content information to be sent by the transmitting end is "011010", then the first obtaining device, according to the predetermined boundary rule and the content information, in A boundary "1" is set before the first bit of the content information to obtain the information "10110101" to be sent. It should be noted that when the length of the initial sequence is N, and the predetermined boundary rule indicates that the boundary "1" is set on both sides of the content information, the maximum length of the content information is N-1-2; for example, N=1023, Then the maximum length of content information is 1020, that is, there are 2^1020 kinds of content information that may be represented.

It should be noted that when the predetermined boundary rule indicates that the boundary "1" is set on both sides of the content information, the length of the information to be sent can be set arbitrarily. If the length of the initial sequence is N, the maximum length of the content information is N -1-2; For example, N=1023, the final sequence generated based on the initial information can be used to represent 2^1020 possible content information

It should be noted that when the transmitting end needs to send a plurality of content information to the receiving end, for each content information, the first obtaining means obtains a piece of content information corresponding to the content information to be sent according to the predetermined boundary rules and the content information. layer information. For example, the content information to be sent includes "011010" and "101001", and the predetermined boundary rule indicates that a boundary "1" is set on both sides of the content information; for the content information "011010", the first obtaining means For content information, generate a layer of information "10110101" corresponding to the content information; for content information "101001", the first obtaining device generates a layer of information "101001" corresponding to the content information according to predetermined boundary rules and the content information 11010011".

Specifically, when the information to be sent includes only one layer of information, the first generating device 1 at the transmitting end cyclically shifts the initial sequence corresponding to the information according to the information to be sent, and each time the cyclic shift obtains a new After completing all the cyclic shift operations, the first generation device 1 superimposes the initial sequence with all the sequences obtained by cyclic shifting the initial sequence to generate the final sequence that needs to be sent to the receiving end. The final sequence is used to carry the information to be sent.

As an example, the information to be sent is "10110101", and Fig. 3 shows a schematic diagram of cyclically shifting the initial sequence according to the information to be sent to generate the final sequence, where seq1 is the initial sequence; Device 1 shifts seq1 by 2 bits to obtain seq2 shown in Figure 3 according to the position of "1" in the message "10110101" to be sent, shifts seq1 by 3 bits to get seq3 shown in Figure 3, and shifts seq1 by 5 bits Obtain seq4 shown in Figure 3, shift seq1 by 7 bits to obtain seq5 shown in Figure 3; after that, the first generation device 1 superimposes seq1, seq2, seq3, seq4, seq5 to obtain the final sequence seq6 as shown in Figure 3 .

As a preferred solution of the first generating device 1, the information to be sent includes multi-layer information, and the first generating device 1 further includes a second generating device (not shown in the figure) and a third generating device (not shown in the figure).

For each layer of information in the multi-layer information, the second generating means cyclically shifts the initial sequence corresponding to the layer information according to the layer information, and shifts the initial sequence corresponding to the layer information and the All sequences obtained by shifting are superimposed to generate a sequence for carrying information of this layer.

Among them, the root of the initial sequence corresponding to each layer of information is different, for example, the information to be sent includes two layers of information: "10110101" and "11010011", the root of the initial sequence seq11 corresponding to "10110101" is u1," The root of the initial sequence seq21 corresponding to 11010011" is u2, and u1 is not equal to u2.

As an example, the information to be sent includes two layers of information: "10110101" and "11010011". For the first layer of information "10110101", the second generation device corresponds to "10110101" according to the position of "1" in "10110101". The corresponding initial sequence seq11 is cyclically shifted, and the sequence seqL1 used to carry "10110101" is generated by superimposing seq11 and all sequences obtained by cyclically shifting seq11; for the second layer information "11010011", The second generation device performs cyclic shift on the initial sequence seq21 corresponding to "11010011" according to "11010011", and superimposes seq21 and all sequences obtained by cyclically shifting seq21 to generate a sequence for carrying "11010011" The sequence of seqL2.

The third generating means superimposes the multiple sequences generated by the second generating means for respectively carrying the information of each layer to generate a final sequence to be sent to the receiving end.

For example, the information to be sent includes two layers of information: "10110101" and "11010011". For the first layer of information "10110101", the second generating means generates a sequence seqL1 for carrying "10110101" and a sequence for carrying "11010011 The sequence seqL1 of "; the third generation device superimposes seqL1 and seqL2 to generate the final sequence seqL that needs to be sent to the receiving end, and the final sequence seqL carries the above two layers of information.

It should be noted that this preferred solution supports the situation of multiple users, and can send information for multiple users at the same time; for example, the information to be sent includes multiple layers of information, where each layer of information corresponds to one user.

It should be noted that the above examples are only to better illustrate the technical solutions of the present invention, rather than limiting the present invention. Those skilled in the art should understand that any initial sequence is cyclically shifted according to the information to be sent, and by The implementation of superimposing the initial sequence and all the sequences obtained through cyclic shift to generate the final sequence to be sent to the receiving end shall be included in the scope of the present invention.

It should be noted that in the prior art, the sounding sequence is used to detect and determine interference from the base station. According to 3GPP regulations, the frequency accuracy of the base station is within ±0.05ppm, and the maximum error between two base stations is 0.1ppm. For example, for a 2.6GHz communication system, the CFO is 260Hz or the subcarrier spacing is 0.0173; through simulation, within [-4.5, +4.5] KHz, or the normalized offset of the subcarrier spacing is in [-0.3, 0.3] When , the detector is insensitive to CFO, therefore, it is generally impossible for the detection sequence in the prior art to have an integer frequency offset. However, in this embodiment, since the operation performed by the first generating device 1 is equivalent to encoding the information to be transmitted by shifting the initial sequence by integer bits, it allows integer CFO (carrier frequency offset, carrier frequency offset ), the integer CFO does not need to be modified.

The sending device 2 at the transmitting end sends the final sequence to the receiving end.

For example, the transmitting end is a base station, the receiving end is a user equipment, and the sending device 2 of the base station sends the final sequence generated by the first generating device 1 of the base station to the user equipment.

As a preferred solution, the sending device 2 further includes a sub-sending device (not shown in the figure). The sub-transmission means transmits the final sequence to the receiving end by mapping the final sequence to even or odd subcarriers in the frequency domain.

For example, the sub-transmission device maps the final sequence generated by the first generating device 1 to even-numbered subcarriers (that is, subcarriers with even numbers) in the frequency domain, and odd-numbered subcarriers (that is, subcarriers with odd numbers) Leave blank to send the final sequence to the receiver.

It should be noted that, based on this preferred scheme, after the transmitter maps the final sequence to even or odd subcarriers in the frequency domain, fast Fourier is performed on the mapped OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) symbols. Inverse Fast Fourier Transform (IFFT, Inverse Fast Fourier Transform) can generate repeated continuous waves in the time domain, which can facilitate synchronous detection at the receiving end while transmitting information.

As an example, FIG. 5 is a schematic diagram of the process of sending the final sequence to the receiving end at the transmitting end in an example of the present invention, wherein the final sequence is mapped to even-numbered subcarriers in the frequency domain (that is, the black subcarriers shown in FIG. 5 subcarriers), and the odd subcarriers (that is, the blank subcarriers shown in Figure 5) are empty, the transmitter performs IFFT on the OFDM symbols generated after mapping to convert from the frequency domain to the time domain, and then generates The time-domain signal of the time-domain signal is inserted into the cyclic prefix, and then the waveform shown in Figure 5 can be generated, wherein, after the waveform corresponding to the cyclic prefix, a repeated continuous wave is generated to facilitate synchronous detection.

It should be noted that the above examples are only to better illustrate the technical solution of the present invention, rather than limiting the present invention. Those skilled in the art should understand that any implementation of sending the final sequence to the receiving end should be included within the scope of the present invention.

The receiving device 3 at the receiving end receives the final sequence from the transmitting end.

The second obtaining means 4 at the receiving end obtains the information carried in the final sequence by correlating the final sequence with the initial sequence.

Specifically, the second obtaining means 4 correlates the final sequence with the initial sequence, and obtains the information carried in the final sequence based on the carrier position where the peak obtained by correlation is located.

It should be noted that, at the receiving end, after both the time domain and the frequency domain are synchronized, the second obtaining means 4 correlates the received final sequence with the agreed local initial sequence (preferably, when there is almost no multipath effect Correlation), and then, the second obtaining means 4 obtains the information carried in the final sequence according to the generated peak value.

Specifically, the second obtaining means 4 obtains the information carried in the final sequence by correlating the final sequence with the initial sequence, including but not limited to:

1) The final sequence only carries one layer of information; the second obtaining means 4 obtains the information carried in the final sequence by autocorrelating the final sequence with the initial sequence.

For example, the final sequence only carries one layer of information, and the second obtaining means 4 performs autocorrelation between the final sequence and the initial sequence, and the simulation result is shown in Figure 4, wherein the horizontal axis represents the carrier, and the vertical axis represents the amplitude after correlation, Based on the carrier positions where the five peaks (that is, the maximum amplitude value) shown in FIG. The information corresponding to the 0th, 2nd, 3rd, 5th, and 7th) is "1", and the information corresponding to other carrier positions is "0". It should be noted that Fig. 4 is an enlarged view of the simulation result, and the peak value obtained by the actual simulation should reach 1.

2) The final sequence carries multiple layers of information; the second obtaining device 4 further includes a third obtaining device (not shown in the figure), and the third obtaining device obtains the final sequence by correlating the final sequence with a plurality of initial sequences Multiple layers of information carried in .

Specifically, the third obtaining means correlates the final sequence with multiple initial sequences in the form of sequential scanning, so as to obtain the multi-layer information carried in the final sequence. Among them, in the process of correlation, autocorrelation is performed between sequences with the same root, and cross-correlation is performed between sequences with different roots. It should be noted that the third obtaining means obtains one layer of information carried in the final sequence based on the result of autocorrelation between the final sequence and an initial sequence.

As an example, the final sequence carries two layers of information, and the third obtaining means correlates the final sequence with the two agreed initial sequences, and the simulation results are shown in Figures 6 and 7, where the horizontal axis represents the carrier, and the vertical axis The axis represents the amplitude after correlation; the third obtaining means can determine that the first-level information carried in the final sequence is "10110101" based on the carrier positions of the five peaks shown in Figure 6, where the carrier position of the peaks is (the 0th, the 2nd, the 3rd, the 5th, the 7th) the corresponding information is "1", and the information corresponding to the other carrier positions is "0"; the third obtaining means is based on the The carrier positions where the five peaks are located can determine that the second layer information carried in the final sequence is "11010011", where the carrier positions where the peaks are located (0th, 1st, 3rd, 6th, 6th, 7) the corresponding information is "1", and the information corresponding to other carrier positions is "0". It should be noted that Fig. 6 and Fig. 7 are enlarged diagrams of simulation results, and the peak value obtained by actual simulation should reach 1. In addition, Fig. 6 and Fig. 7 also show the noise in the correlation process. It can be clearly seen from Fig. 6 and Fig. 7 that since the final sequence has excellent autocorrelation and cross-correlation, even if there is noise coverage, the The information carried by the final sequence can be accurately decoded.

It should be noted that, preferably, when the length of the information carried in the final sequence is a predetermined length, and the information length determined by the second obtaining means 4 based on the carrier position where the peak value obtained by correlation is less than the predetermined length, the second obtaining The device 4 determines the information carried in the final sequence in combination with the predetermined length and predetermined boundary rules; wherein, when the information carried in the final sequence is multi-layer information, the receiving end determines the information carried in the final sequence in combination with the predetermined length and predetermined boundary rules. information for each layer. For example, the predetermined boundary rule indicates that the boundary "1" is set before the first bit of the content information, and the predetermined length is 8 bits; the information determined by the second obtaining means 4 based on the carrier position where the peak value obtained by correlation is "101101" (each One bit is 1 bit), the second obtaining means 4 adds "0" at the end of the determined information based on the predetermined length and predetermined boundary rules, and obtains the information carried by the final sequence as "10110100", so that the length of the information for the predetermined length.

It should be noted that the above examples are only to better illustrate the technical solutions of the present invention, rather than limiting the present invention. Those skilled in the art should understand that any combination of the final sequence and the initial sequence to obtain the final The implementation of the information carried in the sequence shall be included in the scope of the present invention.

As a preferred solution of this embodiment, the second device of this embodiment further includes an extracting device (not shown) that operates after the second obtaining device 4 . The extracting means extracts content information from the obtained information according to predetermined boundary rules. Wherein, when the obtained information is multi-layer information, the extracting means extracts corresponding content information from each layer of information in the multi-layer information according to predetermined boundary rules.

As an example, the predetermined boundary rule indicates that the boundary "1" is set before the first bit of the content information, and the second obtaining means 4 obtains the information carried in the final sequence as "10010100" based on the carrier position where the peak value obtained by correlation is located; after that, extract The device removes the leading boundary "1" according to the predetermined boundary rule, so as to extract the content information "0010100" from the obtained information.

As another example, the predetermined boundary rule indicates that the boundary "1" is set on both sides of the content information, and the second obtaining means 4 obtains the information carried in the final sequence as "10110101" based on the carrier position where the peak value obtained by correlation is located; after that , the extracting means removes the boundary "1" on both sides according to the predetermined boundary rule, so as to extract the content information "011010" from the obtained information.

As yet another example, the predetermined boundary rule indicates that a boundary "1" is set on both sides of the content information, and the second obtaining means 4 obtains the The first layer information "10110101" and the second layer information "11010011". Afterwards, for the first-level information "10110101", the extraction device removes the boundary "1" on both sides of the first-level information according to the predetermined boundary rule, so as to extract the content information "011010" from the first-level information; For the second-level information "11010011", the extraction device removes the boundary "1" on both sides of the second-level information according to the predetermined boundary rule, so as to extract the content information "101001" from the second-level information.

It should be noted that the above examples are only to better illustrate the technical solution of the present invention, rather than limit the present invention. Those skilled in the art should understand that any content extracted from the obtained information according to predetermined boundary rules The realization of information shall be included in the scope of the present invention.

What needs to be explained is that when the content information is encoded information obtained by encoding the original information at the transmitting end, the receiving end also needs to perform corresponding decoding operations on the encoded information, for example, the transmitting end encodes "1" into "1111 ", "0" is encoded as "0000", then the receiving end decodes "1111" in the content information as "1", and "0000" as "0".

It should be noted that the final sequence of the solution of this embodiment can carry multiple layers of information at the same time, and when the final sequence carries multiple layers of information at the same time, the bandwidth efficiency of the channel will be folded and increased. For example, the maximum bandwidth efficiency h of the channel is expressed as:

h＝m(N-3)/(B(T _CP +T _u ))

Among them, B represents the bandwidth, T _CP represents the cyclic prefix length in a short time, _Tu represents the OFDM symbol length in a short time, m is the joint length of multi-layer information, and N is the length of the final sequence.

Fig. 8 to Fig. 12 respectively show the schematic diagram of the bit error rate of AWGN (Additive White Gaussian Noise, additive white Gaussian noise) channel when the final sequence carries information of different layers, wherein, the horizontal axis represents the signal-to-noise ratio (SNR, Signal Noise Ratio), the vertical axis represents the bit error rate (BER, Bit Error Ratio). Fig. 8 is a schematic diagram of the bit error rate of the AWGN channel when the final sequence of an example only carries one layer of information, the bandwidth efficiency of the AWGN channel is 1.39bps/HZ, and the information of this layer is the geographical information (longitude and latitude) of the base station (length is 32bit), the final sequence is transmitted to the receiving end through the AWGN channel after OFDM modulation, the average bit error rate of the AWGN channel in this case exceeds one thousandth, compared with the uncoded BPSK system in the prior art, There is about 9dB gain. Figure 9 is a schematic diagram of the bit error rate of the AWGN channel when the final sequence of an example carries two layers of information, and the bandwidth efficiency of the AWGN channel is 2.78bps/HZ; Figure 10 is the error rate of the AWGN channel when the final sequence of an example carries three layers of information A schematic diagram of the code rate, the bandwidth efficiency of the AWGN channel is 4.17bps/HZ; Figure 11 is a schematic diagram of the bit error rate of the AWGN channel when the final sequence carries four-layer information of an example, the bandwidth efficiency of the AWGN channel is 5.56bps/HZ; 12 is a schematic diagram of the bit error rate of the AWGN channel when the final sequence carries six layers of information, and the bandwidth efficiency of the AWGN channel is 8.34bps/HZ.

According to the solution of this embodiment, a new way of transmitting information is provided, and the information can be represented by the carrier position corresponding to the peak value of the sequence; the transmitting end can cyclically shift the initial sequence according to the information to be sent, and pass Superimpose the initial sequence and all the sequences obtained by cyclic shifting to generate the final sequence that needs to be sent to the receiving end, and transmit the final sequence to the receiving end. The receiving end can correlate the received final sequence with the initial sequence , to obtain the information carried in the final sequence, thereby realizing the transmission of the information to be sent; supporting the transmission of single-user or multi-user information, such as the information to be sent can be multi-layer information, and each layer of information can correspond to different Users; the final sequence transmitted can also be used as a detection sequence to realize synchronous detection while transmitting information, that is, the final sequence can not only realize the detection function, but also have the function of carrying information; even in the case of noise coverage, It can also accurately parse out the information carried in the final sequence.

It should be noted that the present invention can be implemented in software and/or a combination of software and hardware. For example, each device of the present invention can be implemented by using an application specific integrated circuit (ASIC) or any other similar hardware devices. In one embodiment, the software program of the present invention can be executed by a processor to realize the steps or functions described above. Likewise, the software program (including associated data structures) of the present invention can be stored in a computer-readable recording medium such as RAM memory, magnetic or optical drive or floppy disk and the like. In addition, some steps or functions of the present invention may be implemented by hardware, for example, as a circuit that cooperates with a processor to execute each step or function.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned. In addition, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. A plurality of units or devices stated in the system claims may also be realized by one unit or device through software or hardware. The words first, second, etc. are used to denote names without implying any particular order.

Claims (15)

1. A method for transmitting information, wherein the method comprises the steps of: a. Perform cyclic shift on the initial sequence according to the information to be sent, and generate the final sequence to be sent to the receiving end by superimposing the initial sequence and all the sequences obtained through the cyclic shift; b. Sending the final sequence to the receiving end. 2. The method according to claim 1, wherein the information to be sent comprises multi-layer information, and said step a comprises: For each layer of information in the multi-layer information, the initial sequence corresponding to the layer information is cyclically shifted according to the layer information, and obtained by cyclically shifting the initial sequence corresponding to the layer information and Superimpose all the sequences of the layer to generate a sequence for carrying the information of this layer; The generated multiple sequences respectively used to carry the information of each layer are superimposed to generate a final sequence that needs to be sent to the receiving end. 3. The method according to claim 1 or 2, wherein the method also comprises the following steps before step a: The information to be sent is obtained according to predetermined boundary rules and content information to be sent. 4. The method according to any one of claims 1 to 3, wherein said step b comprises: The final sequence is sent to the receiver by mapping it to even or odd subcarriers in the frequency domain. 5. A method for transmitting information, wherein the method comprises the steps of: A. Receive the final sequence from the transmitter; B. Obtaining the information carried in the final sequence by correlating the final sequence with the initial sequence. 6. The method according to claim 5, wherein said step B comprises the steps of: By correlating the final sequence with multiple initial sequences, the multi-layer information carried in the final sequence is obtained. 7. The method according to claim 5 or 6, wherein the method further comprises: Content information is extracted from the obtained information according to predetermined boundary rules. 8. A first means for transmitting information, wherein the first means comprises the following means: The first generating device is configured to cyclically shift the initial sequence according to the information to be sent, and generate a final sequence to be sent to the receiving end by superimposing the initial sequence and all sequences obtained through the cyclic shift; The sending device is used to send the final sequence to the receiving end. 9. The first device according to claim 8, wherein the information to be sent comprises multi-layer information, and the first generating means comprises: The second generating means is used for, for each layer of information in the multi-layer information, cyclically shifting the initial sequence corresponding to the layer information according to the layer information, and by shifting the initial sequence corresponding to the layer information and superimposing all sequences obtained through cyclic shifting to generate a sequence for carrying information of this layer; The third generating means is configured to superimpose the generated multiple sequences respectively used to carry the information of each layer to generate a final sequence to be sent to the receiving end. 10. The first device according to claim 8 or 9, wherein the first device further comprises the following means for performing operations before the first generating means: The first obtaining means is configured to obtain the information to be sent according to predetermined boundary rules and content information to be sent. 11. The first device according to any one of claims 8 to 10, wherein the sending device comprises: The sub-transmitting means is used to transmit the final sequence to the receiving end by mapping the final sequence to even or odd sub-carriers in the frequency domain. 12. A second means for transmitting information, wherein the second means comprises the following means: a receiving device, configured to receive the final sequence from the transmitting end; The second obtaining means is used to obtain the information carried in the final sequence by correlating the final sequence with the initial sequence. 13. The second device according to claim 12, wherein the second obtaining means comprises the following means: The third obtaining means is configured to obtain multi-layer information carried in the final sequence by correlating the final sequence with a plurality of initial sequences. 14. The second device according to claim 12 or 13, wherein the second device further comprises: The extracting means is used for extracting content information from the obtained information according to predetermined boundary rules. 15. A system for transmitting information, comprising a transmitting end and a receiving end, the transmitting end comprising the first device according to any one of claims 8 to 11, the receiving end comprising the first device according to claim 12 to The second device of any one of 14.