Precoder using a generalized decision feedback equalizer using the receive beamforming for matrix operations in a multiple-user multiple-input-multiple output radio transmission system

摘要

Realize GDFE precoder for multi-user (MU) MIMO systems, without causing any capacity loss, to greatly reduce the computational cost. Assuming determining a valid downlink (DL) channel matrix H of the DL channel after reception processing at the user terminal, and that the row number and the same number of user terminals of the effective DL channel matrix H exists, uplink (UL) and determining by calculation the covariance matrix D, a step of determining by calculation a filter matrix C based on the UL covariance matrix D, a step of determining by calculation a feedforward filter matrix F based on the filter matrix C, the feedforward filter matrix F and based on the filter matrix C, and processing and determining by calculation the pre-interference cancellation matrix G to be used at the transmitter in the pre-interference cancellation stage of GDFE precoder, the user symbol by the decision feedback equalization stage of GDFE precoder the method comprising the steps of generating a vector symbols after filtering is provided.