Method, Terminal And Base Station For Multi-User Interference Suppression

A data receiving method, comprising:

• receiving, by a user, data sent by a base station;
• demapping, by the user, the received data to obtain a common pilot sequence and service data containing multi-user interference, wherein the common pilot sequence is the same pilot signal sequence sent by the base station on a specific time-frequency resource to the user and other users receiving and sending data on the same time-frequency resource as the user;
• performing, by the user, channel estimation by using the common pilot sequence to obtain a channel matrix between the user and the base station;
• performing eigenvalue decomposition on the product of the channel matrix and a conjugate transposition of the channel matrix to obtain a detection vector;
• and
• demodulating the service data containing multi-user interference by using the detection vector, to obtain service data of the user.

A base station, comprising:

• a precoding matrix generating module configured to obtain, according to a channel matrix of each of paired users, a precoding matrix of the paired users, wherein the paired users are a set of multiple users sharing the same time-frequency resource and receiving and sending data on the same time-frequency resource simultaneously;
• a layer mapping module configured to perform layer mapping on service data of the paired users to obtain layered service data;
• a precoding module configured to precode the layered service data by using the precoding matrix obtained by the precoding matrix generating module, to obtain precoded output data;
• an antenna mapping module configured to map the precoded output data and a common pilot sequence to a port of an antenna array, wherein the common pilot sequence is the same pilot signal sequence sent by a base station on a specific time-frequency resource to each user in the paired users;
• and
• an antenna array configured to send the data mapped to the port of the antenna array to each user by using the antenna array.

A terminal, comprising:

• a receiving module configured to receive data sent by a base station;
• a demapping module configured to demap the received data to obtain a common pilot sequence and service data containing multi-user interference, wherein the common pilot sequence is the same pilot signal sequence sent by the base station on a specific time-frequency resource to the terminal and other terminals receiving and sending data on the same time-frequency resource as the terminal;
• a channel estimation module configured to perform channel estimation by using the common pilot sequence to obtain a channel matrix between the terminal and the base station;
• an eigenvalue decomposition module configured to perform eigenvalue decomposition on the product of the channel matrix and conjugate transposition of the channel matrix to obtain a detection vector;
• and
• a demodulation module configured to demodulate the service data containing multi-user interference by using the detection vector to obtain service data of the user.