在多天线系统中,BLAST是提高系统通信容量的有效方式。最简单的空间复用方式是V-BLAST,它的检测算法相对简单,有ZF-DFE,MMSE-DFE,ML和ML-DFE等检测算法。该文在这几种算法的基础上,讨论了改进ML-DFE性能的方法,给出了ZF和MMSE方式的组合LSD和DFE检测算法。仿真表明LSD算法只需输出3个检测结果,在复杂度增加不多的条件下,就可以获得大的性能改进,而MMSE方式的算法较ZF算法有更好的性能。
BLAST can effectively increase information rate in multi-antenna system. The simplest space multiplex method is V-BLAST, which has simple detection algorithm'such as ZF-DFE, MMSE-DFE, ML and ML-DFE etc. This paper discussed methods to improve the ML-DFE algorithm, proposed combined LSD and DFE detection algorithm based on ZF and MMSE criteria. Simulation results show that large performance improvement can be obtained when the LSD algorithm output only 3 detection results, and the algorithm based on MMSE criteria has better performance than based on ZF criteria.