一种针对混合空时编码解码方案的改进

An Effective Decoding Method for Mixed Space-Time Coded System

针对结合空时分组码(STBC)及分层空时码(V-BLAST)的混合空时编码结构,提出了一种新型的接收解码方案.该方案首先对发送矢量、信道矩阵及接收矢量进行简单的拓展重构,然后直接进行V-BLAST串行干扰消除检测算法,充分利用了STBC的分集增益及V-BLAST串行干扰消除译码的优势.仿真结果表明,对于STBC占较大比重的混合空时编码结构或接收天线数量大于发送天线数量的情况,这种新型的接收解码方案的误码率性能相对于传统的解码方案优势尤其明显,适用于上行链路使用.

An effective decoding method was designed for mixed space-time coded system that combines STBC and V-BLAST coding structures. This new method first simply restructures the channel response matrix as well as the vectors of transmit/receive symbols and directly applies V-BLAST zero force detection algorithm afterwards. The simulation results show that this decoding method outperforms the traditional decoding method that using group interference suppression together with STBC and V-BLAST decoding. The advantage grows with the increase of STBC proportion in the transmit structure as well as the increase of receive antennas.