CN114553338B - Method and device for determining interference signal, electronic equipment and readable storage medium - Google Patents

Abstract

The application relates to an interference signal determining method, an interference signal determining device, electronic equipment and a readable storage medium, wherein the electronic equipment generates a first signal sent by an interference cell according to preset channel estimation parameters; then, according to the channel estimation parameters, carrying out channel estimation on the signal received in the target symbol for transmitting the first signal to obtain a channel estimation result; and finally, acquiring an interference signal of an interference cell in the current received signal according to the channel estimation result and the first signal. By adopting the method, the system overhead in the interference elimination process can be reduced.

Description

Interference signal determination method, device, electronic device and readable storage medium

Technical Field

The present application relates to the field of terminal technology, and in particular to an interference signal determination method, device, electronic device and readable storage medium.

Background technique

In wireless communication, the signals received by the electronic device include not only the signals of the cell to which the electronic device is connected, but also interference signals from other cells. The electronic device can gradually eliminate the interference signals of each interference cell by serial interference cell method.

Taking the example of electronic equipment performing interference elimination on a cell-specific reference signal (CRS signal), the electronic equipment needs to first decode the physical broadcast channel (PBCH) signal corresponding to each interfering cell, and determine the CRS signal of each interfering cell in the received signal based on the information obtained from the decoding.

The use of the above interference elimination method results in a large system overhead of the electronic device.

Summary of the invention

The embodiments of the present application provide an interference signal determination method, device, electronic device, and readable storage medium, which can reduce the system overhead of interference elimination performed by the electronic device.

In a first aspect, a method for determining an interference signal includes:

Generate a first signal sent by the interfering cell according to a preset channel estimation parameter;

According to the channel estimation parameter, channel estimation is performed on the signal received in the target symbol to obtain a channel estimation result; the target symbol is the symbol for sending the first signal;

An interference signal of an interfering cell in a currently received signal is obtained according to the channel estimation result and the first signal.

In a second aspect, an interference signal determination device includes:

A generating module, used for generating a first signal sent by an interfering cell according to a preset channel estimation parameter;

An estimation module, configured to perform channel estimation on a signal received in a target symbol according to a channel estimation parameter to obtain a channel estimation result; the target symbol is a symbol for sending the first signal;

The acquisition module is used to acquire the interference signal of the interfering cell in the current received signal according to the channel estimation result and the first signal.

In a third aspect, an electronic device includes a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the processor executes the steps of the above-mentioned interference signal determination method.

In a fourth aspect, a computer-readable storage medium stores a computer program, which implements the steps of the above method when executed by a processor.

In a fifth aspect, a computer program product comprises a computer program, which implements the steps of the above method when executed by a processor.

The above-mentioned interference signal determination method, device, electronic device and readable storage medium, the electronic device generates a first signal sent by an interfering cell according to preset channel estimation parameters; then, according to the channel estimation parameters, channel estimation is performed on the signal received in the target symbol of sending the first signal to obtain a channel estimation result; finally, according to the channel estimation result and the first signal, the interference signal of the interfering cell in the current received signal is obtained. Since the channel estimation parameters are preset in the electronic device, when interference elimination is performed on the first signal, the first signal sent by the interfering cell can be generated based on the above-mentioned preset channel estimation parameters, and the channel estimation result corresponding to the first signal can be obtained based on the above-mentioned preset channel estimation parameters, without the need to decode the PBCH signal sent by the interfering cell to obtain the channel estimation parameters, thereby reducing the calculation complexity of the electronic device in determining the interference signal and reducing the system overhead; further, since the electronic device does not need to decode the PBCH signal before determining the interference signal, the parameters such as soft values stored in the decoding process in the electronic device can be reduced, the data storage space required for the electronic device to determine the interference signal can be reduced, and the system overhead is further reduced; the electronic device does not need to decode the PBCH signal of each subframe, so the waiting time for decoding before interference elimination can be avoided, thereby improving the efficiency of interference elimination of the electronic device and reducing system delay.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

FIG1 is a diagram showing an application environment of an interference signal determination method according to an embodiment of the present application;

FIG2 is a flow chart of a method for determining an interference signal in one embodiment of the present application;

FIG3 is a flow chart of a method for determining an interference signal in one embodiment of the present application;

FIG4 is a flow chart of a method for determining an interference signal in one embodiment of the present application;

FIG5 is a flow chart of a method for determining an interference signal in one embodiment of the present application;

FIG6 is a flow chart of a method for determining an interference signal in one embodiment of the present application;

FIG7 is a structural block diagram of an interference signal determination device in one embodiment of the present application;

FIG8 is a structural block diagram of an interference signal determination device in one embodiment of the present application;

FIG9 is a structural block diagram of an interference signal determination device in one embodiment of the present application;

FIG10 is a structural block diagram of an interference signal determination device in one embodiment of the present application;

FIG11 is a structural block diagram of an interference signal determination device in one embodiment of the present application;

FIG. 12 is a schematic diagram of the structure of an electronic device in one embodiment of the present application.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

FIG1 is a schematic diagram of an application environment of a noise estimation method in an embodiment. As shown in FIG1 , the application environment includes an electronic device 100, and the electronic device 100 can access a target cell 200; when receiving a signal from the target cell 200, the electronic device 100 may also receive interference signals from other interfering cells 300 adjacent to the target cell 200. The network devices covering the above cells may include but are not limited to: a base station NodeB, an evolved base station eNodeB, a base station in a fifth generation (5G) communication system, a base station or network device in a future communication system, an access node in a WiFi system, a wireless relay node, a wireless backhaul node, etc. The above network devices may also be wireless controllers, small stations, transmission reference points (TRPs), road side units (RSUs), etc. in a cloud radio access network (CRAN) scenario. The embodiments of the present application do not limit the specific technology and specific device form adopted by the above network devices. The electronic device may be a user device with wireless transceiver function, which may be, but is not limited to, a handheld, wearable or vehicle-mounted device, etc.; the user device may be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. The embodiments of the present application do not limit the application scenarios.

FIG2 is a flow chart of a method for determining an interference signal in an embodiment. The method for determining an interference signal in this embodiment is described by taking the electronic device running in FIG1 as an example. As shown in FIG2, the method includes:

S102: Generate a first signal sent by an interfering cell according to preset channel estimation parameters.

The interfering cell may be a cell adjacent to the target cell accessed by the electronic device, or may be another cell with the same frequency as the target cell accessed by the electronic device.

Taking one of the subframes as an example, the signal received by the electronic device may include a CRS signal, a PBCH signal, a signal carried in a downlink physical control channel (Physical Downlink Control Channel, PDCCH for short) and a downlink physical shared channel (Physical Downlink Share Channel, PDSCH for short), etc. The current received signal of the electronic device may include, in addition to the CRS signal and PBCH signal of the target cell being accessed, the CRS signal and PBCH signal of one or more interfering cells. Taking the CRS signal as an example, the CRS signal of the interfering cell will interfere with the CRS signal of the target cell, affecting the CRS signal decoding performance of the target cell. Therefore, the electronic device needs to determine the interference signals generated by each interfering cell in the received signal to improve the signal decoding performance of the target cell.

The electronic device can determine, for each interfering cell, the interference signal corresponding to the interfering cell in the received signal. The above-mentioned first signal can be a CRS signal sent by the interfering cell, or a PBCH signal sent by the interfering cell, or a signal carried by the interfering cell through a PDCCH channel or a PDSCH channel; the type of the above-mentioned first signal is not limited here. Taking the interfering cell as a 5G cell as an example, the above-mentioned first signal can also be a pilot signal sent by the 5G cell, such as a synchronization broadcast block (Synchronization Signal/PBCH, referred to as SSB).

The channel estimation parameters may be parameters that the electronic device needs to use when performing channel estimation on the received interference signal. For the same interference cell, the channel estimation parameters may remain unchanged within a certain time range. The channel estimation parameters may include the system bandwidth of the interference cell and the number of antenna ports of the interference cell, which are not limited here.

The above channel estimation parameters can be preset in the electronic device. In one implementation, the electronic device can store the channel estimation parameters used when eliminating the interference signal generated by the interfering cell in the previous subframe, so that the stored channel estimation parameters can be directly used when eliminating the interference signal in the current received signal.

In another implementation of this embodiment, the above-mentioned preset channel estimation parameters may be parameters in a preset parameter list, and the electronic device may query the channel estimation parameters corresponding to the interfering cell in the preset parameter list. Among them, the above-mentioned parameter list may include channel estimation parameters corresponding to different interfering cells. The channel estimation parameters in the above-mentioned parameter list may include the system bandwidth and the number of antenna ports of the interfering cell. In the above-mentioned parameter list, the channel estimation parameters corresponding to different interfering cells may be the same or different. For example, the above-mentioned parameter list may include cell identifiers of multiple interfering cells, and each cell identifier corresponds to a set of channel estimation parameters, as shown in the following table:

Cell ID System bandwidth Number of antenna ports Interference cell 1 Bandwidth 1 Number of ports N1 Interference cell 2 Bandwidth 2 Number of ports N2 Interference cell 3 Bandwidth 3 Number of ports N3

The channel estimation parameters in the above parameter list may be obtained by the electronic device by decoding a signal carrying the channel estimation parameters in a historical received signal.

The above-mentioned historical received signal may be a signal received in the first subframe after the electronic device registers the target cell. After registering the target cell, the electronic device may decode the signal carrying the channel estimation parameters in each interfering cell in the first subframe, extract the channel estimation parameters from the above decoding results, and generate a parameter list. Alternatively, the above-mentioned historical received signal may be determined according to a preset parameter list update period. The electronic device may determine the subframe in which the channel estimation parameters need to be updated according to the preset parameter list update period, and then decode the signal carrying the channel estimation parameters corresponding to each interfering cell in the subframe, extract the channel estimation parameters from the above decoding results, and generate a parameter list. Alternatively, the electronic device may detect whether the channel estimation parameters of each interfering cell have changed. After the channel estimation parameters of the interfering cell have changed, the electronic device may decode the signal carrying the channel estimation parameters corresponding to the interfering cell, extract the channel estimation parameters from the above decoding results, and generate a parameter list. The method for obtaining the above parameter list is not limited here.

The electronic device may generate the first signal corresponding to the above-mentioned channel estimation parameter according to a preset signal generation method by simulating the method in which the network device sends the first signal.

The signal carrying the channel estimation parameters may be a PBCH signal sent by an interfering cell. The electronic device may use a preset bandwidth to perform channel estimation on the received PBCH signal, and then decode the PBCH signal according to the channel estimation result, and extract the master information module (MIB) information of the interfering cell from the decoding result. The MIB information may include the system bandwidth and number of antenna ports of the interfering cell, and may also include the system frame number corresponding to the historical received signal. The electronic device may extract the required channel estimation parameters from the MIB information; after obtaining the channel estimation parameters of multiple interfering cells, a parameter list may be generated.

S104. Perform channel estimation on a signal received in a target symbol according to a channel estimation parameter to obtain a channel estimation result; the target symbol is a symbol for sending the first signal.

The first signal sent by the interfering cell received by the electronic device is the interference signal in the current received signal. In order to determine the interference signal, the electronic device can perform channel estimation on the signal received in the target symbol of the first signal. The above channel estimation can be a least squares method (LS) channel estimation, a minimum mean square error (MMSE) channel estimation, a discrete Fourier transform (DFT)-based channel estimation, and a decision feedback-based channel estimation. In one implementation, the electronic device can first perform LS channel estimation on the above received signal to obtain a rough estimation result, and then use MMSE channel estimation to reduce the noise of the above rough estimation result to obtain a noise-reduced channel estimation result.

S106. Obtain an interference signal of an interfering cell in a currently received signal according to the channel estimation result and the first signal.

After generating the first signal sent by the interfering cell and the channel estimation result corresponding to the first signal, the electronic device can obtain the interference signal of the interfering cell in the current received signal based on the channel estimation result and the first signal. The electronic device can determine the product of the channel estimation result and the first signal as the interference signal of the above-mentioned interfering cell; or, the electronic device can also determine the interference signal of the interfering cell in the current received signal based on the channel estimation result and the first signal, combined with the noise estimation result. The method for determining the above-mentioned interference signal is not limited here.

In one implementation, the first signal may be a CRS signal sent by an interfering cell, and the channel estimation result obtained by the electronic device may be a CRS channel estimation result. When the electronic device obtains the interference signal of the interfering cell in the current received signal based on the channel estimation result and the first signal, the product of the CRS channel estimation result and the CRS signal may be determined as the CRS interference signal of the interfering cell in the current received signal.

After the electronic device determines the interference signal, it can subtract the interference signal from the current received signal to complete the interference elimination.

In the above interference signal determination method, the electronic device generates a first signal sent by the interference cell according to a preset channel estimation parameter; then, according to the channel estimation parameter, the signal received in the target symbol of the first signal is channel estimated to obtain a channel estimation result; finally, according to the channel estimation result and the first signal, the interference signal of the interference cell in the current received signal is obtained. Since the channel estimation parameter is preset in the electronic device, when the interference elimination is performed on the first signal, the first signal sent by the interference cell can be generated based on the preset channel estimation parameter, and the channel estimation result corresponding to the first signal can be obtained based on the preset channel estimation parameter, without the need to decode the PBCH signal sent by the interference cell to obtain the channel estimation parameter, thereby reducing the computational complexity of the electronic device when determining the interference signal and reducing the system overhead; further, since the electronic device does not need to decode the PBCH signal before determining the interference signal, the parameters such as soft values stored in the decoding process can be reduced in the electronic device, and the data storage space required for the electronic device to determine the interference signal can be reduced, further reducing the system overhead; the electronic device does not need to decode the PBCH signal of each subframe, thereby avoiding the waiting time for decoding before interference elimination, improving the efficiency of interference elimination of the electronic device and reducing the system delay.

FIG3 is a flow chart of a method for determining an interference signal in an embodiment. This embodiment relates to a manner in which an electronic device generates a first signal. Based on the above embodiment, as shown in FIG3 , the method includes:

S202: Determine a subframe number corresponding to a currently received signal according to a subframe counter.

In the process of generating the first signal, the electronic device needs to determine the subframe number corresponding to the current received signal in addition to the system bandwidth and the number of antenna ports in the above channel estimation parameters.

A subframe counter may be preset in the electronic device, and after each subframe signal is received, the subframe counter is incremented by 1. The subframe counter may start counting after the electronic device accesses the target cell, and the electronic device may determine the subframe number corresponding to the currently received signal according to the counting result of the subframe counter; or, the counting result of the subframe counter may directly indicate the subframe number corresponding to the currently received signal.

In one implementation, the subframe counter may be re-counted in the next subframe after parsing the channel estimation parameters. For example, the electronic device parses the historical received signal of the Nth frame to obtain the channel estimation parameters; after receiving the received signal of the N+1th frame, the count value of the subframe counter is 1.

The parameter list may also include a first frame number corresponding to the channel estimation parameter obtained by parsing, and the electronic device may determine the sum of the value of the subframe counter and the first frame number as the subframe number corresponding to the current received signal.

S204: Generate a first signal corresponding to a channel estimation parameter and a subframe number according to a preset signal generation rule.

On the basis of obtaining the above subframe number, the electronic device may generate a channel estimation parameter and a first signal corresponding to the subframe number according to a preset signal generation rule. The signal generation rules corresponding to different signal types may be different. For example, the above first signal may be a CRS signal, and the electronic device may generate a CRS signal sent by an interfering cell according to a preset CRS signal generation rule; the above first signal may be a PBCH signal, and the electronic device may generate a PBCH signal sent by an interfering cell according to a preset PBCH signal generation rule.

The above-mentioned interference signal determination method obtains the subframe number corresponding to the current received signal through a subframe counter, so that a first signal can be generated based on preset channel estimation parameters, avoiding interference elimination after decoding the PBCH signal in the current received signal, reducing the calculation complexity of the electronic device when determining the interference signal, and reducing system overhead.

FIG4 is a flow chart of a method for determining an interference signal in an embodiment of the present application. The present embodiment relates to a process of an electronic device determining a PBCH interference signal in a currently received signal. Based on the above embodiment, as shown in FIG4 , the above method further includes:

S302: Generate a PBCH signal sent by the interfering cell according to the channel estimation parameters.

The electronic device may generate a PBCH signal corresponding to the channel estimation parameter and the subframe number of the current received signal according to a preset PBCH signal generation rule.

S304. Pre-construct a first PBCH interference signal of an interfering cell in a current received signal according to a PBCH signal and an initial estimation result of a PBCH channel; the initial estimation result of a PBCH channel is obtained by performing an interpolation process based on an estimation result of a CRS channel.

When an electronic device performs channel estimation on a signal received in a symbol of a PBCH signal sent by an interfering cell, it needs to be based on the CRS signal received in the current received signal. Therefore, based on the CRS channel estimation result obtained by the electronic device, it can be assumed that the interfering cell uses the same transmission power when sending the CRS signal and the PBCH signal, and then the initial PBCH channel estimation result is estimated based on the CRS channel estimation result. The electronic device can interpolate the CRS channel estimation result to obtain the above-mentioned initial PBCH channel estimation result. In another implementation method, the electronic device can also use the MIB information obtained by decoding the PBCH channel as a pilot signal to determine the initial PBCH channel estimation result.

On the basis of obtaining the initial estimation result of the PBCH channel, the electronic device can pre-construct the first PBCH interference signal of the interfering cell in the current received signal according to the PBCH signal and the initial estimation result of the PBCH channel. The electronic device can determine the product of the PBCH signal sent by the interfering cell and the initial estimation result of the PBCH channel as the first PBCH interference signal of the interfering cell in the current received signal. Since it is assumed in the above process that the interfering cell uses the same transmission power when sending the CRS signal and the PBCH signal, there may be a difference in the power of the above first PBCH interference signal and the actual PBCH interference signal in the current received signal.

S306. Determine an amplitude ratio of a CRS signal and a PBCH signal sent by an interfering cell according to a correlation between the first PBCH interference signal and the second PBCH interference signal; the second PBCH interference signal is a signal received in a symbol of a sent PBCH signal.

The electronic device may receive the second PBCH interference signal in the symbol of the PBCH signal sent by the interfering cell. By calculating the correlation between the first PBCH interference signal and the second PBCH interference signal, the amplitude ratio of the CRS signal and the PBCH signal sent by the interfering cell may be determined.

For example, the initial estimation result of the PBCH channel may be expressed as H _PBCH , the PBCH signal sent by the interfering cell generated by the electronic device may be X _PBCH , and the first PBCH interference signal may be expressed as Electronic devices can use the formula The amplitude ratio ρ _{PBCH /CRS} of the CRS signal and the PBCH signal is calculated, wherein the Y _PBCH is the second PBCH interference signal.

S308: Determine the product of the amplitude ratio and the first PBCH interference signal as the PBCH interference signal of the interfering cell in the current received signal.

Furthermore, the electronic device may determine the product of the amplitude ratio and the first PBCH interference signal as the PBCH interference signal of the interfering cell in the current received signal. The above PBCH interference signal may be expressed as

After obtaining the CRS interference signal and the PBCH interference signal in the current received signal, the electronic device can further determine the interference signals in the PDSCH channel and the PDCCH channel. The electronic device can subtract the above-mentioned CRS interference signal, the PBCH interference signal and other interference signals from the current received signal, and can complete the interference elimination for the interfering cell.

The electronic device may use serial interference cancellation (SIC) to gradually subtract the interference signals of each interfering cell; or may use parallel interference cancellation (PIC) to simultaneously subtract the interference signals generated by the interfering cells other than the target cell.

In one implementation, after performing a cell search, the electronic device may measure each interfering cell to obtain the signal strength corresponding to each interfering cell. Furthermore, the electronic device sorts each interfering cell according to the cell measurement results and determines the interference elimination order of each interfering cell. In the above interference elimination order, the electronic device may eliminate interference for the interfering cell with the strongest signal strength. The electronic device may use the above interference elimination order to sequentially eliminate interference signals such as the CRS interference signal and the PBCH interference signal of the interfering cell in the current received signal.

FIG5 is a flow chart of a method for determining an interference signal in an embodiment. This embodiment determines a way for an electronic device to maintain a parameter list. Based on the above embodiment, as shown in FIG5 , the method further includes:

S402: Determine whether the channel estimation parameters of the interfering cell included in the parameter list are valid.

The electronic device can determine whether the channel estimation parameters of the interfering cell included in the parameter list are valid according to the intermediate variables in the interference elimination process. The intermediate variables can be the difference between the interference signals determined multiple times in succession, or the gain value for measuring the interference elimination effect.

Optionally, the intermediate variable may be an amplitude ratio of the first signal to the second signal, wherein the first signal may be a CRS signal sent by an interfering cell, and the second signal may be a PBCH signal sent by the interfering cell. The electronic device may obtain the amplitude ratio of the first signal to the second signal; and then, based on the amplitude ratio, determine whether the channel estimation parameters of the interfering cell included in the parameter list are valid.

The electronic device can obtain the above-mentioned amplitude ratio in the process of determining the PBCH interference signal. For the method of obtaining the amplitude ratio, please refer to the description in the above S206. Since the above-mentioned amplitude ratio represents the correlation between the first PBCH interference signal and the second PBCH interference signal, if the channel estimation parameters carried in the current received signal are inconsistent with the channel estimation parameters in the parameter list, then the PBCH signal generated based on the channel estimation parameters in the parameter list, and the constructed first PBCH interference signal and the actual PBCH interference signal have a large difference, so that the correlation between the first PBCH interference signal and the second PBCH interference signal is low, so that the amplitude ratio is small.

The electronic device may compare the amplitude ratio with a preset threshold value, and determine whether the channel estimation parameters in the parameter list are valid according to the comparison result. If the amplitude ratio is less than the preset threshold value, the electronic device may determine that the channel estimation parameters of the interfering cell included in the parameter list are invalid; if the amplitude ratio is greater than or equal to the preset threshold value, the channel estimation parameters of the interfering cell included in the parameter list are determined to be valid.

S404: If not, delete the channel estimation parameters corresponding to the interfering cell from the parameter list.

If the electronic device determines that the channel estimation parameters of the interfering cell in the parameter list are invalid, the channel estimation parameters corresponding to the interfering cell can be deleted from the parameter list. The electronic device can decode the PBCH signal in the current received signal, re-obtain the channel estimation parameters of the interfering cell, and then perform interference elimination on the current received signal; or, the electronic device can decode in the next subframe to obtain the channel estimation parameters of the interfering cell.

After the electronic device deletes the channel estimation parameter corresponding to the interfering cell, it cannot obtain the channel estimation parameter from the parameter list after obtaining the received signal in the next subframe. If the channel estimation parameter corresponding to the interfering cell does not exist in the parameter list, the electronic device can decode the signal received in the symbol of the PBCH signal, extract the updated channel estimation parameter of the interfering cell from the decoding result, and update the updated channel estimation parameter to the parameter list.

In the above interference signal determination method, the electronic device can maintain the accuracy of the channel estimation parameters in the parameter list by maintaining the parameter list, thereby making the interference signal determination result more accurate and ensuring the interference elimination effect.

In one embodiment, a method for determining an interference signal is provided, as shown in FIG6 , the method comprising:

S501. In a preset parameter list, query the channel estimation parameters corresponding to the interfering cell; determine whether the parameter list contains the channel estimation parameters corresponding to the interfering cell, if yes, execute S503; if no, execute S502.

S502: Decode the signal received in the symbol of the sent PBCH signal, extract the updated channel estimation parameters of the interfering cell from the decoding result, and update the updated channel estimation parameters into the parameter list.

S503: Generate a CRS signal sent by the interfering cell according to preset channel estimation parameters.

S504: Perform channel estimation on the signal received in the target symbol according to the channel estimation parameters to obtain a CRS channel estimation result.

S505: Determine the product of the CRS channel estimation result and the CRS signal as the CRS interference signal of the interfering cell in the current received signal.

S506: Generate a PBCH signal sent by the interfering cell according to the channel estimation parameters.

S507: Pre-construct a first PBCH interference signal of the interfering cell in the current received signal according to the PBCH signal and the initial estimation result of the PBCH channel.

S508: Determine an amplitude ratio of a CRS signal and a PBCH signal sent by the interfering cell according to a correlation between the first PBCH interference signal and the second PBCH interference signal.

S509, determine whether the amplitude ratio is less than a preset threshold, if so, execute S510; if not, execute S511.

S510: Determine the product of the amplitude ratio and the first PBCH interference signal as the PBCH interference signal of the interfering cell in the current received signal.

S511. Delete the channel estimation parameters corresponding to the interfering cell from the parameter list.

The implementation principle and technical effects of the above-mentioned interference signal determination method can be found in the above-mentioned embodiments and will not be elaborated here.

It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

Based on the same inventive concept, the embodiment of the present application also provides an interference signal determination device for implementing the interference signal determination method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in the one or more interference signal determination device embodiments provided below can refer to the limitations of the interference signal determination method above, and will not be repeated here.

In one embodiment, as shown in FIG7 , an interference signal determination device is provided, comprising:

A generating module 10, configured to generate a first signal sent by an interfering cell according to a preset channel estimation parameter;

The estimation module 20 is used to perform channel estimation on the signal received in the target symbol according to the channel estimation parameter to obtain a channel estimation result; the target symbol is the symbol for sending the first signal;

The acquisition module 30 is used to acquire the interference signal of the interfering cell in the current received signal according to the channel estimation result and the first signal.

In one embodiment, based on the above embodiment, as shown in Figure 8, the above device also includes a query module 40, which is used to: query the channel estimation parameters corresponding to the interfering cell in a preset parameter list; the channel estimation parameters include the system bandwidth and the number of antenna ports of the interfering cell.

In one embodiment, based on the above embodiment, the generation module 10 is specifically used to: determine the subframe number corresponding to the current received signal according to the subframe counter; and generate the channel estimation parameter and the first signal corresponding to the subframe number according to a preset signal generation rule.

In one embodiment, based on the above embodiment, the parameter list also includes the first frame number corresponding to the analysis of the channel estimation parameters, and the above generation module 10 is specifically used to: determine the sum of the value of the subframe counter and the first frame number as the subframe number corresponding to the current received signal; wherein the subframe counter restarts counting in the next subframe after the channel estimation parameters are analyzed.

In one embodiment, based on the above embodiment, the channel estimation parameters in the parameter list are obtained by decoding a signal carrying the channel estimation parameters in a historical received signal.

In one embodiment, based on the above embodiment, as shown in Figure 9, the above device also includes a determination module 50, which is used to: determine whether the channel estimation parameters of the interfering cell included in the parameter list are valid; if not, delete the channel estimation parameters corresponding to the interfering cell in the parameter list.

In one embodiment, based on the above embodiment, the first signal is a cell reference signal CRS signal, and the determination module 50 is specifically used to: obtain the amplitude ratio of the first signal to the second signal; wherein the second signal is a broadcast channel PBCH signal sent by the interfering cell; and determine whether the channel estimation parameters of the interfering cell included in the parameter list are valid according to the amplitude ratio.

In one embodiment, based on the above embodiment, the determination module 50 is specifically used to: if the amplitude ratio is less than a preset threshold, then determine that the channel estimation parameters of the interfering cell included in the parameter list are invalid; if the amplitude ratio is greater than or equal to the preset threshold, then determine that the channel estimation parameters of the interfering cell included in the parameter list are valid.

In one embodiment, based on the above embodiment, as shown in Figure 10, the above device also includes a decoding module 60, which is used to decode the signal received in the symbol of the sent PBCH signal if the channel estimation parameters corresponding to the interfering cell do not exist in the parameter list, and extract the updated channel estimation parameters of the interfering cell from the decoding result, and update the updated channel estimation parameters to the parameter list.

In one embodiment, based on the above embodiment, the first signal is a CRS signal sent by an interfering cell; the channel estimation result is a CRS channel estimation result, and the acquisition module 30 is specifically used to: multiply the CRS channel estimation result by the CRS signal to determine the CRS interference signal of the interfering cell in the current received signal.

In one embodiment, based on the above embodiment, the acquisition module 30 is also used to: generate a PBCH signal sent by an interfering cell according to a channel estimation parameter; pre-construct a first PBCH interference signal of the interfering cell in the current received signal according to the PBCH signal and the initial estimation result of the PBCH channel; the initial estimation result of the PBCH channel is obtained by interpolation processing based on the CRS channel estimation result; determine the amplitude ratio of the CRS signal and the PBCH signal sent by the interfering cell according to the correlation between the first PBCH interference signal and the second PBCH interference signal; the second PBCH interference signal is a signal received in the symbol of the sent PBCH signal; and determine the product of the amplitude ratio and the first PBCH interference signal as the PBCH interference signal of the interfering cell in the current received signal.

In one embodiment, based on the above embodiment, as shown in Figure 11, the above device also includes an elimination module 70, which is used to: sort the interfering cells according to the cell measurement results, and determine the interference elimination order of each interfering cell; adopt the interference elimination order to eliminate the CRS interference signal and PBCH interference signal of the interfering cell in the current received signal in sequence.

The implementation principle and technical effects of the above-mentioned interference signal determination device refer to the above-mentioned method embodiment, which will not be described in detail here.

Each module in the above interference signal determination device can be implemented in whole or in part by software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each module.

In one embodiment, an electronic device is provided, and its internal structure diagram can be shown in Figure 12. The computer device includes a processor, a memory, an input/output interface, a communication interface, a display unit and an input device. Among them, the processor, the memory and the input/output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input/output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input/output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be implemented through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a method for determining an interference signal is implemented.

Those skilled in the art will understand that the structure shown in FIG. 12 is merely a block diagram of a partial structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

The embodiment of the present application further provides a computer-readable storage medium, one or more non-volatile computer-readable storage media containing computer-executable instructions, which, when executed by one or more processors, enable the processors to perform the steps of the interference signal determination method.

An embodiment of the present application also provides a computer program product comprising instructions, which, when executed on a computer, enables the computer to execute the interference signal determination method.

Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims (15)

1. A method for determining an interference signal, comprising: Generate a first signal sent by the interfering cell according to a preset channel estimation parameter; According to the channel estimation parameter, channel estimation is performed on a signal received in a target symbol to obtain a channel estimation result; the target symbol is a symbol for sending the first signal; According to the channel estimation result and the first signal, the interference signal of the interfering cell in the current received signal is obtained; the first signal is a CRS signal sent by the interfering cell; the channel estimation result is a CRS channel estimation result, and according to the channel estimation result and the first signal, the interference signal of the interfering cell in the current received signal is obtained, including: multiplying the product of the CRS channel estimation result and the CRS signal, and determining it as the CRS interference signal of the interfering cell in the current received signal. 2. The method according to claim 1, characterized in that the method further comprises: In a preset parameter list, query the channel estimation parameters corresponding to the interfering cell; the channel estimation parameters include the system bandwidth and the number of antenna ports of the interfering cell. 3. The method according to claim 2, wherein generating the first signal sent by the interfering cell according to the preset channel estimation parameter comprises: Determine the subframe number corresponding to the current received signal according to the subframe counter; The channel estimation parameter and the first signal corresponding to the subframe number are generated according to a preset signal generation rule. 4. The method according to claim 3, characterized in that the parameter list also includes a first frame number corresponding to the first frame number obtained by parsing the channel estimation parameter; and determining the subframe number corresponding to the current received signal according to the subframe counter comprises: The sum of the value of the subframe counter and the first frame number is determined as the subframe number corresponding to the current received signal; wherein the subframe counter restarts counting in the next subframe after parsing the channel estimation parameter. 5. The method according to claim 2 is characterized in that the channel estimation parameters in the parameter list are obtained by decoding a signal carrying the channel estimation parameters in a historical received signal. 6. The method according to any one of claims 2 to 5, characterized in that the method further comprises: Determining whether the channel estimation parameters of the interfering cell included in the parameter list are valid; If not, the channel estimation parameter corresponding to the interfering cell is deleted from the parameter list. 7. The method according to claim 6, wherein the first signal is a cell reference signal (CRS) signal, and the determining whether the channel estimation parameters of the interfering cell included in the parameter list are valid comprises: Acquire an amplitude ratio of the first signal to a second signal; wherein the second signal is a broadcast channel PBCH signal sent by the interfering cell; It is determined whether the channel estimation parameters of the interfering cell included in the parameter list are valid according to the amplitude ratio. 8. The method according to claim 7, characterized in that the determining, according to the amplitude ratio, whether the channel estimation parameters of the interfering cell included in the parameter list are valid comprises: If the amplitude ratio is less than a preset threshold, determining that the channel estimation parameter of the interfering cell included in the parameter list is invalid; If the amplitude ratio is greater than or equal to the preset threshold, it is determined that the channel estimation parameters of the interfering cell included in the parameter list are valid. 9. The method according to claim 6, characterized in that the method further comprises: If the channel estimation parameters corresponding to the interfering cell do not exist in the parameter list, the signal received in the symbol of the sent PBCH signal is decoded, and the updated channel estimation parameters of the interfering cell are extracted from the decoding result, and the updated channel estimation parameters are updated to the parameter list. 10. The method according to claim 1, characterized in that the method further comprises: Generating a PBCH signal sent by an interfering cell according to the channel estimation parameter; Pre-constructing a first PBCH interference signal of the interfering cell in the current received signal according to the PBCH signal and the initial estimation result of the PBCH channel; the initial estimation result of the PBCH channel is obtained by interpolation processing based on the CRS channel estimation result; Determine, according to the correlation between the first PBCH interference signal and the second PBCH interference signal, an amplitude ratio of the CRS signal sent by the interfering cell and the PBCH signal; the second PBCH interference signal is a signal received in a symbol in which the PBCH signal is sent; The product of the amplitude ratio and the first PBCH interference signal is determined as the PBCH interference signal of the interfering cell in the current received signal. 11. The method according to claim 10, characterized in that the method further comprises: Sort the interfering cells according to the cell measurement results, and determine the interference elimination order of the interfering cells; The interference elimination order is adopted to sequentially eliminate the CRS interference signal and the PBCH interference signal of the interfering cell in the current received signal. 12. An interference signal determination device, comprising: A generating module, used for generating a first signal sent by an interfering cell according to a preset channel estimation parameter; an estimation module, configured to perform channel estimation on a signal received in a target symbol according to the channel estimation parameter to obtain a channel estimation result; the target symbol is a symbol for sending the first signal; An acquisition module is used to acquire the interference signal of the interfering cell in the current received signal according to the channel estimation result and the first signal; the first signal is a CRS signal sent by the interfering cell; the channel estimation result is a CRS channel estimation result, and the acquisition module is specifically used to: determine the product of the CRS channel estimation result and the CRS signal as the CRS interference signal of the interfering cell in the current received signal. 13. An electronic device comprising a memory and a processor, wherein a computer program is stored in the memory, wherein when the computer program is executed by the processor, the processor executes the steps of the interference signal determination method as described in any one of claims 1 to 11. 14. A computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 11 are implemented. 15. A computer program product, comprising a computer program, characterized in that when the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 11 are implemented.