Research of detection for multi-carrier spatial multiplexing systems based on nonlinear precoding
Yuan Zhang · Jisuanji yingyong yanjiu · 2011
Considering the error propagation effect and high complexity of vertical Bell Labs layered space time,proposed a novel detection method for multi-carrier spatial multiplexing systems based on nonlinear precoding.Used the geometric mean decomposition method for the channel precoding matrix which had the same equivalent noise gain among each sub-channel,and used the nonlinear module algebra THP precoding between sub-carrier channels of MC-CDMA to eliminate interference from other signals at the transmitter.This could effectively eliminate the error propagation effect of layered space-time codes.At the receiver,used ZF and MMSE criterion and the complexity of the downlink receiver could be reduced.Simulation results show that the proposed algorithm is better than the traditional algorithm in the BER.