Interference rejection combining method, device and storage medium

1. An interference rejection combining (IRC) method supporting transmit diversity, comprising:

generating an N*N interference and noise covariance matrix corresponding to one subcarrier from signals, in a transmit diversity mode, received at cell reference signal (CRS) resource positions via N receiving antennas, where N is greater than or equal to 3;

performing Cholescy decomposition and upper triangular matrix inversion on the N*N interference and noise covariance matrix to obtain an N*N block matrix;

expanding the N*N block matrix to a 2N*2N noise whitening matrix; and

whitening the received signals and channel estimation values according to the noise whitening matrix, and using the whitened received signals and channel estimation values to obtain a minimum mean square error-IRC (MMSE-IRC) processing result.

2. The IRC method according to claim 1 , wherein said generating an N*N interference and noise covariance matrix corresponding to one subcarrier from signals, in a transmit diversity mode, received at CRS resource positions via N receiving antennas comprises:

subtracting, from the signals, in the transmit diversity mode, received at CRS resource positions via N receiving antennas, a product of the corresponding channel estimation values and CRS symbols, and

performing self-correlation on signals obtained by the subtracting to generate the N*N interference and noise covariance matrix corresponding to the one subcarrier.

3. The IRC method according to claim 1 , wherein the Cholescy decomposition and the upper triangular matrix inversion are performed in parallel.

4. The IRC method according to claim 1 , wherein said expanding the N*N block matrix to the 2N*2N noise whitening matrix comprises:

forming the 2N*2N noise whitening matrix by using the N*N block matrix and conjugates of the N*N block matrix, wherein main diagonal elements of the formed 2N*2N noise whitening matrix are the N*N block matrix and the conjugates of the N*N block matrix, and off-diagonal elements of the formed 2N*2N noise whitening matrix are zero.

5. The IRC method according to claim 1 , wherein said whitening the received signals and the channel estimation values according to the noise whitening matrix comprises:

whitening, according to the noise whitening matrix U, the received signals into {tilde over (Y)}=UY and the channel estimation values into {tilde over (H)}=UH, wherein the Y represents the received signals, and the H represents a matrix of the channel estimation values.

6. An interference rejection combining (IRC) device supporting transmit diversity, comprising:

a processor; and

a memory storing instructions executable by the processor;

wherein the processor is arranged to:

generate an N*N interference and noise covariance matrix corresponding to one subcarrier from signals, in a transmit diversity mode, received at cell reference signal (CRS) resource positions via N receiving antennas, where N is greater than or equal to 3;

perform Cholescy decomposition and upper triangular matrix inversion on the N*N interference and noise covariance matrix to obtain an N*N block matrix, and expand the N*N block matrix to a 2N*2N noise whitening matrix;

whiten the received signals and channel estimation values according to the noise whitening matrix; and

use the whitened received signals and channel estimation values to obtain a minimum mean square error-IRC (MMSE-IRC) processing result.

7. The IRC device according to claim 6 , wherein the processor is arranged to subtract, from the signals, in the transmit diversity mode, received at CRS resource positions via N receiving antennas, a product of the corresponding channel estimation values and CRS symbols, and perform self-correlation on signals obtained by the subtracting to generate the N*N interference and noise covariance matrix corresponding to the one subcarrier.

8. The IRC device according to claim 6 , wherein the processor is arranged to perform the Cholescy decomposition and the upper triangular matrix inversion on the N*N interference and noise covariance matrix in parallel to obtain the N*N block matrix.

9. The IRC device according to claim 6 , wherein the processor is arranged to form the 2N*2N noise whitening matrix by using the N*N block matrix and conjugates of the N*N block matrix, wherein main diagonal elements of the formed 2N*2N noise whitening matrix are the N*N block matrix and the conjugates of the N*N block matrix, and off-diagonal elements of the formed 2N*2N noise whitening matrix are zero.

10. A receiver, comprising an interference rejection combining (IRC) device supporting transmit diversity, the IRC device comprising:

a processor; and

a memory storing instructions executable by the processor;

wherein the processor is arranged to:

generate an N*N interference and noise covariance matrix corresponding to one subcarrier from signals, in a transmit diversity mode, received at cell reference signal (CRS) resource positions via N receiving antennas, where N is greater than or equal to 3;

perform Cholescy decomposition and upper triangular matrix inversion on the N*N interference and noise covariance matrix to obtain an N*N block matrix, and expand the N*N block matrix to a 2N*2N noise whitening matrix;

whiten the received signals and channel estimation values according to the noise whitening matrix; and

use the whitened received signals and channel estimation values to obtain a minimum mean square error-IRC (MMSE-IRC) processing result.

11. A non-transitory computer storage medium, storing computer executable instructions, which are arranged to execute an interference rejection combining (IRC) method supporting transmit diversity, comprising:

generating an N*N interference and noise covariance matrix corresponding to one subcarrier from signals, in a transmit diversity mode, received at cell reference signal (CRS) resource positions via N receiving antennas, where N is greater than or equal to 3;

performing Cholescy decomposition and upper triangular matrix inversion on the N*N interference and noise covariance matrix to obtain an N*N block matrix;

expanding the N*N block matrix to a 2N*2N noise whitening matrix; and

whitening the received signals and channel estimation values according to the noise whitening matrix, and using the whitened received signals and channel estimation values to obtain a minimum mean square error-IRC (MMSE-IRC) processing result.

12. The receiver according to claim 10 , wherein the processor is arranged to subtract, from the signals, in the transmit diversity mode, received at CRS resource positions via N receiving antennas, a product of the corresponding channel estimation values and CRS symbols, and perform self-correlation on signals obtained by the subtracting to generate the N*N interference and noise covariance matrix corresponding to the one subcarrier.

13. The receiver according to claim 10 , wherein the processor is arranged to perform the Cholescy decomposition and the upper triangular matrix inversion on the N*N interference and noise covariance matrix in parallel to obtain the N*N block matrix.

14. The receiver according to claim 10 , wherein the processor is arranged to form the 2N*2N noise whitening matrix by using the N*N block matrix and conjugates of the N*N block matrix, wherein main diagonal elements of the formed 2N*2N noise whitening matrix are the N*N block matrix and the conjugates of the N*N block matrix, and off-diagonal elements of the formed 2N*2N noise whitening matrix are zero.

15. The non-transitory computer storage medium according to claim 11 , wherein said generating an N*N interference and noise covariance matrix corresponding to one subcarrier from signals, in a transmit diversity mode, received at CRS resource positions via N receiving antennas comprises:

subtracting, from the signals, in the transmit diversity mode, received at CRS resource positions via N receiving antennas, a product of the corresponding channel estimation values and CRS symbols, and

performing self-correlation on signals obtained by the subtracting to generate the N*N interference and noise covariance matrix corresponding to the one subcarrier.

16. The non-transitory computer storage medium according to claim 11 , wherein the Cholescy decomposition and the upper triangular matrix inversion are performed in parallel.

17. The non-transitory computer storage medium according to claim 11 , wherein said expanding the N*N block matrix to the 2N*2N noise whitening matrix comprises:

forming the 2N*2N noise whitening matrix by using the N*N block matrix and conjugates of the N*N block matrix, wherein main diagonal elements of the formed 2N*2N noise whitening matrix are the N*N block matrix and the conjugates of the N*N block matrix, and off-diagonal elements of the formed 2N*2N noise whitening matrix are zero.

18. The non-transitory computer storage medium according to claim 11 , wherein said whitening the received signals and the channel estimation values according to the noise whitening matrix comprises:

whitening, according to the noise whitening matrix U, the received signals into {tilde over (Y)}=UY and the channel estimation values into {tilde over (H)}=UH, wherein the Y represents the received signals, and the H represents a matrix of the channel estimation values.