Research of detection for multi-carrier spatial multiplexing systems based on nonlinear precoding
基于非线性预编码的多载波分层空时检测方法*

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