一种基于MIMO预编码的多径分离方法

针对选择性MIMO信道多经分离问题,提出了一种基于预编码的收发联合设计方案。该方案中的每路发射矢量及其解码矩阵处于其他时延信道的共同零空间,把选择性信道多径分离为空间正交的若干平坦子信道,从而使平坦信道的预编码研究成果可以直接应用于选择性MIMO信道,解决了传统Z域处理中未消除ISI的问题,复杂度为Z域方法的L(多径数目)倍。仿真结果表明,该算法具有较好容量性能和误码率性能。

Method of multi-path separation based on precoding over frequency selective MIMO channel

In frequency-selective MIMO channel,a null space based linear transceiver scheme based on precoding was proposed.Each data vector and corresponding decoding matrix are in the joint null space of other delay channel matrices.Frequency-selective MIMO channel is transformed into several spatially orthogonal flat matrix sub-channels.The precoding research over frequency flat channel is directly applicable to the selective channel,thoroughly removing up ISI problem of Z domain method with identical computation.Simulation results show that the proposed algorithm is of better capacity and error performance.