Remote interference suppression method and apparatus and device

A remote interference suppression method, comprising:

• determining, by a first network device, a first symbol that is interfered with in a subframe as a start uplink symbol;
• determining, by the first network device, S first interference covariance matrices based on S idle resource blocks comprised in the start uplink symbol, wherein the S first interference covariance matrices indicate an interference noise signal received on the S idle resource blocks, and S is an integer greater than or equal to 1;
• averaging, by the first network device, the S first interference covariance matrices corresponding to the S idle resource blocks to obtain a first average matrix;
• performing, by the first network device, singular value decomposition on the first average matrix to obtain a first eigenvector matrix;
• selecting, by the first network device, first Q columns in the first eigenvector matrix to generate a submatrix, wherein the submatrix indicates Q pieces of phase information of remote interference, and Q is an integer greater than or equal to 1;
• calculating, by the first network device, a zero-forcing matrix based on the submatrix;
• performing, by the first network device based on the zero-forcing matrix, zero-forcing processing on an interference noise signal corresponding to a demodulation reference signal, to obtain a second interference covariance matrix, wherein the zero-forcing processing is for making a signal indicated by the Q pieces of phase information approximate 0;
• and
• determining, by the first network device, a downlink transmitting weight and an uplink equalization weight based on the second interference covariance matrix.

A remote interference suppression method, comprising:

• receiving, by a first network device, a sounding sequence from a second network device;
• obtaining, by the first network device, first channel information based on the sounding sequence;
• quantizing, by the first network device, the first channel information to obtain second channel information;
• determining, by the first network device, a submatrix based on the second channel information;
• calculating, by the first network device, a zero-forcing matrix based on the submatrix;
• performing, by the first network device based on the zero-forcing matrix, zero-forcing processing on an interference noise signal corresponding to a demodulation reference signal, to obtain a second interference covariance matrix, wherein the zero-forcing processing is for making a signal indicated by Q pieces of phase information approximate 0;
• and
• determining, by the first network device, an uplink equalization weight based on the second interference covariance matrix.

A remote interference suppression method, comprising:

• receiving, by a first network device, a sounding sequence from a second network device;
• obtaining, by the first network device, first channel information based on the sounding sequence;
• quantizing, by the first network device, the first channel information to obtain second channel information;
• determining, by the first network device, a submatrix based on the second channel information;
• calculating, by the first network device, a zero-forcing matrix based on the submatrix;
• performing, by the first network device based on the zero-forcing matrix, zero-forcing processing on an interference noise signal corresponding to a demodulation reference signal, to obtain a second interference covariance matrix, wherein the zero-forcing processing is for making a signal indicated by Q pieces of phase information approximate 0;
• and
• determining, by the first network device, a downlink transmitting weight based on the second interference covariance matrix.