WO2017080359A1

WO2017080359A1 - Interference cancellation method and apparatus, and base station

Info

Publication number: WO2017080359A1
Application number: PCT/CN2016/103290
Authority: WO
Inventors: 刘一非; 梁敏超; 皮强; 章伟
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-11-10
Filing date: 2016-10-25
Publication date: 2017-05-18
Also published as: CN106685866A; CN106685866B

Abstract

Provided are an interference cancellation method and apparatus, and a base station. The method comprises: acquiring antenna data which has been subjected to reconstruction, and performing linear cancellation on received antenna data and the antenna data which has been subjected to reconstruction so as to generate antenna data which has been subjected to cancellation. By means of the solution, interference cancellation processing for the antenna data in a time domain is completed; and furthermore, if a second channel estimation value is utilized to demodulate the antenna data which has been subjected to cancellation, interference cancellation processing for the antenna data in a space domain is completed. By adopting the solution of the embodiments of the present invention, interference of the other users is reduced, the signal quality of a current demodulated user is improved, and the capacity of a communication system is enlarged.

Description

Interference cancellation method, device and base station

Technical field

The embodiments of the present invention relate to the field of communications, and in particular, to an interference cancellation method, apparatus, and base station.

Background technique

In a wireless communication system, the link from the user equipment to the base station is called an uplink. Since radio waves are electromagnetic waves propagating in free space, such as air and vacuum, they are inevitably subjected to the outside world during communication. In the uplink, a base station needs to receive signals sent by many users at the same time. These multiple users have mutual interference, and when demodulating each user, they are subject to Interference from other users. The more users supported by the uplink, the greater the interference to a target user, and the lower the uplink interference resistance of the base station, which cannot meet the requirements of the customer to continuously improve the network capacity and quality.

Summary of the invention

The main technical problem to be solved by the embodiments of the present invention is to provide an interference cancellation method, device, and base station, which solves the problem of large interference between users in the prior art, and causes low signal quality of the currently demodulated user, and the capacity of the communication system. Insufficient problems.

To solve the above technical problem, an embodiment of the present invention provides an interference cancellation method, including the following steps: acquiring reconstructed antenna data; performing linear cancellation on the received antenna data and the reconstructed antenna data to generate offset Antenna data.

In an embodiment of the present invention, the method further includes: reconstructing the received antenna data to generate the reconstructed antenna data; and transmitting the generated reconstructed antenna data.

In an embodiment of the present invention, after the received antenna data and the reconstructed antenna data are linearly cancelled to generate offset antenna data, the method further includes: decoding the offset antenna data. Tuning, generating a first channel estimation value; performing accuracy correction on the first channel estimation value to generate a second channel estimation value; using the second channel estimation value, The cancelled antenna data is demodulated.

In an embodiment of the present invention, demodulating the offsetted antenna data further generates multipath information. Before performing the accuracy correction on the first channel estimation value to generate the second channel estimation value, the method further includes: Performing a matrix calculation process on the offset antenna data to generate an inverse matrix related to the cancelled antenna data; performing multipath matching on the multipath information to obtain multipath information with successful matching; searching from the inverse matrix and the above Matching the inverse of the successful multipath information; performing the accuracy correction on the first channel estimation value to generate the second channel estimation value: the inverse matrix matching the successfully matched multipath information and the foregoing A channel estimate is weighted to generate a second channel estimate.

In an embodiment of the present invention, the multipath matching is performed on the multipath information, and the multipath information obtained by the matching is specifically: performing multipath matching on the multipath information, if the delay deviation of the multipath information is less than or equal to If the preset multipath information precision is obtained, the multipath information with successful matching is obtained; the accuracy of the preset multipath information is greater than or equal to the accuracy of the multipath information of the system.

In an embodiment of the present invention, performing matrix calculation processing on the canceled antenna data to generate an inverse matrix related to the cancelled antenna data includes: performing autocorrelation matrix calculation on the offset antenna data Correlation matrix; performing inverse matrix calculation on the generated autocorrelation matrix to generate an inverse matrix related to the offset antenna data.

To solve the above technical problem, the present invention further provides an interference cancellation apparatus, including an acquisition module and a linear cancellation module; the acquisition module is configured to acquire reconstructed antenna data; and the linear cancellation module is configured to receive antenna data and The reconstructed antenna data is linearly cancelled to generate offset antenna data.

In an embodiment of the present invention, the method further includes: a reconstruction module, a sending module; the reconstruction module is configured to reconstruct the received antenna data to generate reconstructed antenna data; and the sending module is configured to The generated reconstructed antenna data is sent out.

In an embodiment of the present invention, the method further includes: a first demodulation module, an accuracy correction module, and a second demodulation module; wherein the first demodulation module is configured to receive the antenna data in the linear cancellation module and the foregoing After the reconstructed antenna data is linearly cancelled, and the offset antenna data is generated, the offset antenna data is demodulated to generate a first channel estimation value; The degree correction module is configured to perform accuracy correction on the first channel estimation value to generate a second channel estimation value, and the second demodulation module is configured to demodulate the offset antenna data by using the second channel estimation value.

In an embodiment of the present invention, the first demodulation module is further configured to demodulate the offset antenna data to generate multipath information; further comprising: a matrix calculation processing module, a multipath matching module, and a reverse matrix a search module; the matrix calculation processing module is configured to perform matrix calculation processing on the offset antenna data before the accuracy correction module performs accuracy correction on the first channel estimation value to generate the second channel estimation value, and generate and cancel the offset The antenna data related inverse matrix; the multipath matching module is configured to perform multipath matching on the multipath information to obtain multipath information with successful matching; the inverse matrix search module is configured to search and match the foregoing from the inverse matrix The successful multipath information matches the inverse matrix; the precision correction module includes a weighting processing submodule, and the weighting processing submodule is configured to perform the inverse matrix matching the successfully matched multipath information and the first channel estimation value. Weighting processing to generate a second channel estimate.

In an embodiment of the present invention, the matrix calculation processing module includes an autocorrelation matrix calculation submodule and an inverse matrix calculation submodule; and the autocorrelation matrix calculation submodule is configured to perform autocorrelation matrix calculation on the offset antenna data. Generating an autocorrelation matrix; the inverse matrix calculation submodule is configured to perform inverse matrix calculation on the generated autocorrelation matrix to generate an inverse matrix related to the offset antenna data.

In order to solve the above technical problem, an embodiment of the present invention further provides a base station, including the interference cancellation apparatus as described above.

In the embodiment of the present invention, a computer storage medium is further provided, and the computer storage medium may store an execution instruction for performing the interference cancellation method in the foregoing embodiment.

The beneficial effects of the embodiments of the present invention are:

An embodiment of the present invention provides an interference cancellation method, apparatus, and base station, which obtains the reconstructed antenna data, and then linearly cancels the received antenna data and the reconstructed antenna data to generate offset antenna data. With the above solution, the interference cancellation processing on the antenna data in the time domain is completed;

Further, if the offset antenna data is demodulated by using the second channel estimation value, interference cancellation processing on the antenna data in the spatial domain is completed;

By adopting the solution of the embodiment of the invention, the interference of other users is reduced, the signal quality of the currently demodulated user is improved, and the capacity of the communication system is expanded.

DRAWINGS

FIG. 1 is a flowchart of an interference cancellation method according to Embodiment 1 of the present invention;

2 is a flowchart of an interference cancellation method according to Embodiment 2 of the present invention;

3-1 is a flowchart of an interference cancellation method according to Embodiment 3 of the present invention, and FIG. 3-2 is a schematic diagram of multipath matching success according to Embodiment 3 of the present invention;

4 is a schematic structural diagram of an interference cancellation apparatus according to Embodiment 4 of the present invention;

FIG. 5 is a schematic structural diagram of an interference cancellation apparatus according to Embodiment 5 of the present invention.

detailed description

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

Embodiment 1

As shown in FIG. 1 , an embodiment of the present invention provides a method for canceling interference in a time domain. The number of baseband boards in this embodiment may be multiple. In addition, each baseband board can complete the tasks that can be accomplished by one of the baseband boards described above, including the following steps:

S101: Acquire reconstructed antenna data.

Specifically, in order to eliminate interference in the antenna data as much as possible, first, the baseband board in the baseband resource pool acquires reconstructed antenna data from other baseband boards, and it should be understood that the main body that performs this action is The source of the reconstructed antenna data may be other functional units in the base station, that is, these functional units are used in the present invention to achieve the same interference cancellation function as the baseband board; that is, one of the above functional units acquires the other functions described above. After unit reconstruction Antenna data. The processing implemented by the baseband board in the following steps can also be performed by the above functional unit.

S102: Perform linear cancellation on the received antenna data and the reconstructed antenna data to generate offset antenna data.

Optionally, after obtaining the reconstructed antenna data from the other baseband boards, the baseband board linearly subtracts the antenna data received by the baseband board and the reconstructed antenna data from other baseband boards, so that The cancelled antenna data is obtained, thereby completing the interference cancellation processing on the antenna data in the time domain. With the solution of this embodiment, the startup delay supported in the time domain can be flexibly matched, and different interference cancellation processing can be performed on the antenna data of different channels.

The baseband board can also reconstruct the received antenna data from the control channel and/or the data channel according to the channel reconstruction algorithm, obtain the reconstructed antenna data of the baseband board, and obtain the obtained baseband board. The reconstructed antenna data is sent to other baseband boards; the reconstruction of the antenna data includes spreading, scrambling, filtering, etc. the antenna data.

Embodiment 2

FIG. 2 is a schematic diagram of an interference cancellation method in a time domain and a spatial domain according to an embodiment of the present invention. The number of baseband boards in this embodiment may be multiple. The embodiment is described, and each baseband board can perform the tasks that can be accomplished by one of the baseband boards described above, including the following steps:

S201: Acquire reconstructed antenna data.

Optionally, in order to eliminate interference in the antenna data as much as possible, first, the baseband board in the baseband resource pool acquires reconstructed antenna data from other baseband boards, and it should be understood that the entity that performs the action is performed. And the source of the reconstructed antenna data may be other functional units in the base station, that is, these functional units are used in the present invention to achieve the same interference cancellation function as the baseband board; that is, one of the above functional units acquires the other Antenna data after functional unit reconstruction. The processing implemented by the baseband board in the following steps can also be performed by the above functional unit.

S202: Perform linear cancellation on the received antenna data and the reconstructed antenna data to generate offset antenna data.

S203: Demodulate the offset antenna data to generate a first channel estimation value, and further generate multipath information.

Optionally, performing preliminary demodulation on the offset antenna data obtained in S202 to generate a first channel estimation value; and generating multipath information related to the offset antenna data; it should be understood that, due to the step The preliminary demodulation of the obtained offset antenna data is performed, so the generated first channel estimation value is a relatively coarse channel estimation value.

S204: performing matrix calculation processing on the offset antenna data, and generating an inverse matrix related to the cancelled antenna data;

Optionally, the offset antenna data is calculated according to an autocorrelation matrix algorithm, and an autocorrelation matrix related to the cancelled antenna data is generated; and then the generated autocorrelation matrix is inversely matrix-calculated according to the inverse matrix algorithm, and generated and cancelled. After the antenna data is related to the inverse matrix.

S205: performing multipath matching on the multipath information. If the delay deviation of the multipath information is less than or equal to the preset multipath information accuracy, the multipath information with successful matching is obtained; the preset multipath information accuracy is greater than or equal to the multipath of the system. Information accuracy

Optionally, the accuracy of the multipath information in the current system is 1/8 chips, and the preset multipath information precision can be flexibly set according to a specific scenario, such as 1/4 chip, or 1/2 chip. . Since multipath jitter often occurs in actual systems, especially the multipath measured by the external field is more fluctuating. Therefore, in order to find the multipath with the same delay, multipath matching is performed according to the multipath matching algorithm for each user's multipath information. If the delay deviation of the multipath information does not exceed the preset multipath information precision, the multipath information with successful matching is obtained, and the multipath information of each user is divided into several sets of successfully matched multipath information.

S206: Searching, from the inverse matrix, an inverse matrix matching the successfully matched multipath information;

Optionally, in order to find the inverse matrix matching the successfully matched multipath information, the inverse matrix obtained by S204 is searched for the inverse matrix matched with the successfully matched multipath information.

S207: Perform accuracy correction on the first channel estimation value to generate a second channel estimation value.

Optionally, weighting the inverse matrix and the first channel estimation value that match the successfully matched multipath information to generate a second channel estimation value; it should be understood that, because the step is to perform the first channel estimation value The accuracy is corrected to generate the second channel estimate, so the generated second channel estimate is an accurate channel estimate.

S208: Demodulate the offset antenna data by using the second channel estimation value.

Optionally, in order to implement interference cancellation of the antenna data in the spatial domain, the second channel estimation value is used to demodulate the offset antenna data again, so that user information can be more easily demodulated. The interference cancellation of the received antenna data in the spatial domain; it should be understood that demodulating the cancelled antenna data may be other parameters that can achieve interference cancellation, in addition to using the second channel estimation value, and is not limited. herein.

With the solution of the embodiment, the interference cancellation processing of the antenna data in the time domain and the spatial domain can be realized, the interference of other users is reduced, the signal quality of the currently demodulated user is improved, and the capacity of the communication system is expanded.

Embodiment 3

For a better understanding of the present invention, the present embodiment provides a specific interference cancellation method. The following two antennas and antenna data received by two antennas are built on two baseband boards as an example. For further explanation, as shown in FIG. 3-1, a method for canceling interference in a time domain and a spatial domain according to the embodiment includes the following steps:

S301: The baseband board B receives the antenna data of the two antennas, demodulates the multipath information and the channel estimation value of the control channel on the baseband board B, and then reconstructs the antenna of the control channel when the baseband board B is received according to the reconstruction algorithm. Data, the reconstructed antenna data is sent to the baseband board A through a high speed serializer/deserializer (serializer) (serdes) interface;

S302: The baseband board A receives the antenna data and the reconstructed antenna data sent by the baseband board B, and linearly subtracts the antenna data from the reconstructed antenna data to generate offset antenna data.

After the processing of S302, the antenna data of the control channel in the antenna data is completely removed, so that the interference cancellation processing of the antenna data in the time domain is realized.

S303: The baseband board A demodulates the offset antenna data to generate a first channel estimation value Ra, and may also generate multipath information.

It should be understood that since the step is to perform preliminary demodulation on the obtained offset antenna data, the generated first channel estimation value is a relatively coarse channel estimation value.

S304: the baseband board A calculates the autocorrelation matrix of the two antennas by using the two offset antenna data.

The autocorrelation matrix calculation algorithm is as follows:

The common signal autocorrelation matrix is calculated once per time slot. Let z _U (k, i _A ) be all valid 2 times sampled antenna data in a time slot. Where k ∈ [0, 2560 * 2-1] is the sample index of the antenna data. u(k _U ) represents a 2x1 matrix composed of two canceled antenna data.

u(k _U )=[z _U (k _U ,1)z _U (k _U ,2)] ^T

The autocorrelation matrix corresponding to this vector is:

After calculating the signal autocorrelation matrix at two sampling positions in each chip, and then averaging 2560 matrices at each sampling position, the autocorrelation matrix of the signals shared by the slots can be obtained.

Where: s is the slot index; i _S ∈ {0, 1}, which is the sampling position index; i _C is the chip index.

S305: the baseband board A performs the inverse calculation of the two antennas according to the calculated autocorrelation matrix;

The inverse matrix calculation algorithm is as follows:

Let the autocorrelation matrix corresponding to the antenna index i _A1 , i _A2 on the sampling position i _S be R ₂ :

Where: i _A1 , i _A2 ∈ {1, 2, 3, 4}, and i _A1 <i _A2 ; a ₁₁ is the result obtained by multiplying the data of antenna 1 and antenna 1; a ₁₂ is antenna 1 and antenna 2 The result obtained by multiplying the data; a ₂₁ is the result obtained by multiplying the data of the antenna 2 and the antenna 1; a ₂₂ is the result obtained by multiplying the data of the antenna 2 and the antenna 2.

Then the inverse of R ₂ is:

S306: The baseband board A performs multipath matching on the multipath information for each user's multipath information. If the delay deviation of the multipath information is less than or equal to the preset multipath information precision, the matching is successful. Multipath information; the preset multipath information accuracy is greater than or equal to the multipath information accuracy of the system;

The purpose of multipath matching is to find the multipath with the same delay on both antennas. At present, the accuracy of the multipath information in the system is 1/8 chip, and the preset multipath information precision can be flexibly set according to a specific scenario, such as 1/4 chip or 1/2 chip; and the actual system Multipath jitter often occurs in the medium, especially the multipath measured by the external field is more fluctuating. Figure 3-2 shows the possible five successful combinations.

There are two criteria for judging the success of multipath matching: one is that the delay deviation of two multipaths on two antennas does not exceed 1/4 chip (corresponding to Case1-Case3 in Figure 3-2); The delay deviation of the two multipaths on the two antennas does not exceed 1/2 chip (corresponding to Case1-Case5 in Figure 3-2).

S307: baseband board A searches for an inverse matrix matching the successfully matched multipath information from the inverse matrix;

In order to find the inverse matrix matching the successfully matched multipath information, the inverse matrix obtained by matching the successfully matched multipath information is searched from the inverse matrix obtained in S305.

S308: The baseband board A performs a weight combining calculation on the inverse matrix matched with the successfully matched multipath information and the first channel estimation value Ra, to generate a second channel estimation value Rb;

It should be understood that since the step is to perform a weight combining calculation on the inverse matrix matched with the successfully matched multipath information and the first channel estimation value Ra, the second channel estimation value is generated, so the generated second channel estimation is performed. The value is an accurate channel estimate.

The calculation formula for the weight combination calculation is:

RICE ₂ (R _b )=invR ₂ *RCE ₂ (R _a )

Wherein, invR ₂ is a 2x2 inverse matrix, and RCE ₂ (R _a ) is two first channel estimation values belonging to two antennas, which is a 2x1 matrix. RICE ₂ (R _b ) is two second channel estimation values of two antennas after weighting, and is a 2x1 matrix.

S309: The baseband board A demodulates the offset antenna data by using the second channel estimation value Rb.

Optionally, in order to enable interference cancellation of the antenna data in the spatial domain, the baseband board A The second channel estimation value Rb is used to demodulate the cancelled antenna data again, so that the user information can be more easily demodulated, thereby achieving interference cancellation on the received antenna data.

Embodiment 4

4 is a schematic structural diagram of an interference cancellation apparatus in a time domain according to an embodiment of the present invention. Referring to FIG. 4, the interference cancellation apparatus 40 includes: an acquisition module 401, a linear cancellation module 402; and an acquisition module 401 configured to acquire a heavy The configured antenna data; the linear cancellation module 402 is configured to linearly cancel the received antenna data and the reconstructed antenna data to generate offset antenna data.

Optionally, in order to eliminate interference in the antenna data as much as possible, the acquiring module 401 first acquires the reconstructed antenna data.

After the acquisition module 401 obtains the reconstructed antenna data, the linear cancellation module 402 linearly subtracts the received antenna data and the reconstructed antenna data, thereby obtaining the offset antenna data, thereby completing the The interference cancellation processing in the time domain is performed on the antenna data, and the startup delay supported in the time domain is flexibly matched, and different interference cancellation processing can be performed on the antenna data of different channels.

The interference cancellation device 40 further includes: a reconstruction module 403, a transmission module 404; the reconstruction module 403 is configured to reconstruct the received antenna data to generate reconstructed antenna data; and the generated module 404 generates the reconstructed Antenna data is sent out. The reconstruction process of the reconstruction data by the reconstruction module 403 includes performing processing such as spreading, scrambling, filtering, and the like on the antenna data.

The interference cancellation device 40 can be a base station.

Embodiment 5

FIG. 5 is a schematic structural diagram of an apparatus for canceling interference in a time domain and a spatial domain according to an embodiment of the present invention. Referring to FIG. 5, the interference cancellation apparatus 50 includes: an obtaining module 501, a linear canceling module 502, and an acquiring module 501. To obtain the reconstructed antenna data, the linear cancellation module 502 is configured to linearly cancel the received antenna data and the reconstructed antenna data to generate offset antenna data.

Optionally, in order to eliminate interference in the antenna data as much as possible, the acquiring module 501 first acquires the reconstructed antenna data.

After the acquired module 501 obtains the reconstructed antenna data, the linear cancellation module 502 linearly subtracts the received antenna data and the reconstructed antenna data, thereby obtaining the offset antenna data, thereby completing the The interference cancellation processing in the time domain is performed on the antenna data, and the startup delay supported in the time domain is flexibly matched, and different interference cancellation processing can be performed on the antenna data of different channels.

The interference cancellation device 50 further includes: a reconstruction module 503, a transmission module 504; the reconstruction module 503 is configured to reconstruct the received antenna data to generate reconstructed antenna data; and the transmission module 504 generates the reconstructed Antenna data is sent out. The reconstruction processing of the antenna data by the reconstruction module 503 includes performing processing such as spreading, scrambling, filtering, and the like on the antenna data.

The interference cancellation device 50 further includes: a first demodulation module 505, an accuracy correction module 506, and a second demodulation module 507; the first demodulation module 505 is configured to receive the antenna data and the reconstructed data in the linear cancellation module 502. After the antenna data is linearly cancelled, and the offset antenna data is generated, the offset antenna data is initially demodulated to generate a first channel estimation value, and the first demodulation module 505 can also generate multipath information; it should be understood that Since the first demodulation module 505 performs preliminary demodulation on the obtained offset antenna data, the generated first channel estimation value is a relatively coarse channel estimation value; the accuracy correction module 506 is set to the first channel. The estimated value is corrected for accuracy, and the second channel estimation value is generated. It should be understood that since the accuracy correction module 506 is the second channel estimation value generated by performing the accuracy correction on the first channel estimation value, the generated second channel estimation is performed. The value is an accurate channel estimate; in order to enable interference cancellation of the antenna data in the spatial domain, the second demodulation module 507 utilizes the second The channel estimation value, after the antenna data is demodulated again canceled, so that can more easily demodulate the user information, to This implementation eliminates the interference of the received antenna data in the spatial domain; it should be understood that demodulating the cancelled antenna data may be other parameters that can achieve interference cancellation, in addition to using the second channel estimation value, and Not limited to this.

The interference cancellation device 50 further includes: a matrix calculation processing module 508, a multipath matching module 509, and an inverse matrix search module 510. The matrix calculation processing module 508 is configured to perform accuracy correction on the first channel estimation value in the accuracy correction module 506 to generate a second Before the channel estimation value, performing matrix calculation processing on the offset antenna data to generate an inverse matrix related to the cancelled antenna data; the matrix calculation processing module 508 includes an autocorrelation matrix calculation sub-module 5081, a inverse matrix calculation sub-module 5082; The correlation matrix calculation sub-module 5081 is configured to perform autocorrelation matrix calculation on the offset antenna data to generate an autocorrelation matrix related to the cancelled antenna data; the inverse matrix calculation sub-module 5082 is configured to perform inverse matrix on the generated autocorrelation matrix. Calculate, generate an inverse matrix associated with the cancelled antenna data.

The multipath matching module 509 is configured to perform multipath matching on the multipath information. If the delay deviation of the multipath information does not exceed the preset multipath information accuracy, the multipath information with successful matching is obtained; the preset multipath information is more accurate than Or equal to the multipath information accuracy of the system.

Currently, the accuracy of the multipath information in the system is 1/8 chips. The preset multipath information accuracy can be flexibly set according to specific scenarios, such as 1/4 chip or 1/2 chip. Since multipath jitter often occurs in actual systems, especially the multipath measured by the external field is more fluctuating. Therefore, in order to find the multipath with the same delay, multipath matching is performed according to the multipath matching algorithm for each user's multipath information. If the delay deviation of the multipath information does not exceed the preset multipath information precision, the multipath information with successful matching is obtained, and the multipath information of each user is divided into several sets of successfully matched multipath information.

The inverse matrix search module 510 is configured to search the inverse matrix for the inverse matrix matching the successfully matched multipath information; in order to find the inverse matrix matching the successfully matched multipath information, the inverse matrix calculation submodule 5082 is obtained. In the inverse matrix, the inverse matrix matching the matching multipath information is searched.

The accuracy correction module 506 includes a weighting processing sub-module 5061, and the weighting processing sub-module 5061 is configured to perform weighting processing on the inverse matrix and the first channel estimation value that match the successfully matched multipath information to generate a second channel estimation value.

The interference cancellation device 50 can be a base station.

By adopting the scheme of the embodiment, the interference of other users is reduced, the signal quality of the currently demodulated user is improved, and the capacity of the communication system is expanded.

Embodiments of the present invention also provide a storage medium. Optionally, in the embodiment, the foregoing storage medium may be configured to store program code for performing the following steps:

S1, acquiring reconstructed antenna data;

S2, linearly canceling the received antenna data and the reconstructed antenna data to generate offset antenna data.

Optionally, the storage medium is further configured to store program code for performing the following steps: reconstructing the received antenna data, generating the reconstructed antenna data; and transmitting the generated reconstructed antenna data.

Optionally, the storage medium is further configured to store program code for performing the following steps: linearly canceling the received antenna data and the reconstructed antenna data to generate offset antenna data, after offsetting The antenna data is demodulated to generate a first channel estimation value; the first channel estimation value is corrected for accuracy to generate a second channel estimation value; and the second channel estimation value is used to demodulate the cancelled antenna data.

Optionally, the storage medium is further configured to store program code for performing the following steps: demodulating the offsetted antenna data to generate multipath information; performing accuracy correction on the first channel estimate to generate a second channel Before the estimated value, matrix processing is performed on the offset antenna data to generate an inverse matrix related to the cancelled antenna data; multipath matching is performed on the multipath information to obtain a multipath information with successful matching; and searching from the inverse matrix Matching the inverse of the successful multipath information; correcting the accuracy of the first channel estimation value, and generating the second channel estimation value is: an inverse matrix and a first channel estimation value that match the successfully matched multipath information A weighting process is performed to generate a second channel estimate.

Optionally, in this embodiment, the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory. Various types of discs or discs that can store program code medium.

For example, the specific examples in this embodiment may refer to the examples described in the foregoing embodiments and the optional embodiments, and details are not described herein again.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

By acquiring the reconstructed antenna data, and then linearly canceling the received antenna data and the reconstructed antenna data to generate offset antenna data, using the above scheme, the interference of the antenna data in the time domain is completed. Eliminating the processing; further, if the offsetted antenna data is demodulated by using the second channel estimation value, the interference cancellation processing of the antenna data in the spatial domain is completed; using the solution of the embodiment of the present invention, the other users are reduced. The interference improves the signal quality of the currently demodulated user and expands the capacity of the communication system.

Claims

An interference cancellation method includes the following steps:

Obtaining the reconstructed antenna data;

The received antenna data and the reconstructed antenna data are linearly cancelled to generate offset antenna data.
The interference cancellation method according to claim 1, further comprising: reconstructing the received antenna data to generate reconstructed antenna data; and transmitting the generated reconstructed antenna data.
The interference cancellation method according to claim 1 or 2, wherein after the linearly canceling the received antenna data and the reconstructed antenna data to generate the offset antenna data, the method further includes:

Demodulating the cancelled antenna data to generate a first channel estimation value;

Performing precision correction on the first channel estimation value to generate a second channel estimation value;

Demodulating the cancelled antenna data by using the second channel estimation value.
The interference cancellation method according to claim 3, wherein demodulating the cancelled antenna data further generates multipath information; performing accuracy correction on the first channel estimation value to generate a second channel estimation Before the value, it also includes:

Performing a matrix calculation process on the offset antenna data to generate an inverse matrix related to the cancelled antenna data;

Multipath matching is performed on the multipath information to obtain multipath information with successful matching;

Searching, from the inverse matrix, an inverse matrix matching the successfully matched multipath information;

Performing precision correction on the first channel estimation value to generate a second channel estimation value And: performing weighting processing on the inverse matrix matching the successfully matched multipath information and the first channel estimation value to generate a second channel estimation value.
The interference cancellation method according to claim 4, wherein the multipath matching is performed on the multipath information, and the multipath information obtained by the matching is specifically: multipath matching is performed on the multipath information, if If the delay deviation of the multipath information is less than or equal to the preset multipath information precision, the multipath information with successful matching is obtained; the preset multipath information precision is greater than or equal to the multipath information precision of the system.
The interference cancellation method according to claim 4, wherein said performing matrix calculation processing on said cancelled antenna data, and generating an inverse matrix associated with the cancelled antenna data comprises: performing said offset antenna data The autocorrelation matrix calculates an autocorrelation matrix; performs inverse matrix calculation on the generated autocorrelation matrix to generate an inverse matrix related to the cancelled antenna data.
An interference cancellation device includes an acquisition module and a linear cancellation module;

The acquiring module is configured to acquire the reconstructed antenna data;

The linear cancellation module is configured to linearly cancel the received antenna data and the reconstructed antenna data to generate offset antenna data.
The interference cancellation device of claim 7, further comprising: a reconstruction module, a transmitting module; the reconstruction module configured to reconstruct the received antenna data to generate reconstructed antenna data; The sending module is configured to issue the generated reconstructed antenna data.
The interference cancellation device according to claim 7 or 8, further comprising: a first demodulation module, an accuracy correction module, and a second demodulation module;

The first demodulation module is configured to linearly cancel the received antenna data and the reconstructed antenna data after the linear cancellation module generates the offset antenna data, and after the offset antenna data Demodulating to generate a first channel estimate;

The accuracy correction module is configured to perform accuracy correction on the first channel estimation value to generate a second channel estimation value;

The second demodulation module is configured to demodulate the offset antenna data by using the second channel estimation value.
The interference cancellation device of claim 9, wherein the first demodulation module is further configured to demodulate the cancelled antenna data to generate multipath information; further comprising: a matrix calculation processing module, multipath Matching module, inverse matrix search module;

The matrix calculation processing module is configured to perform matrix calculation processing on the offset antenna data before the accuracy correction module performs precision correction on the first channel estimation value to generate a second channel estimation value, and generate and Decoding the inverse of the antenna data after the cancellation;

The multipath matching module is configured to perform multipath matching on the multipath information to obtain multipath information with successful matching;

The inverse matrix search module is configured to search, from the inverse matrix, an inverse matrix that matches the successfully matched multipath information;

The accuracy correction module includes a weighting processing sub-module, and the weighting processing sub-module is configured to perform weighting processing on the inverse matrix matching the successfully matched multipath information and the first channel estimation value to generate a second channel. estimated value.
The interference cancellation device of claim 10, wherein the matrix calculation processing module comprises an autocorrelation matrix calculation sub-module, an inverse matrix calculation sub-module;

The autocorrelation matrix calculation submodule is configured to perform autocorrelation matrix calculation on the cancelled antenna data to generate an autocorrelation matrix;

The inverse matrix calculation submodule is configured to perform inverse matrix calculation on the generated autocorrelation matrix to generate an inverse matrix related to the cancelled antenna data.
A base station comprising the interference cancellation device of any of claims 7-11.