V-BLAST系统接收端解码算法的改进

本文在总结了V—BLAST系统的接收端算法基础上，着重对最大似然（ML）和串行干扰抵消（OSIC）相结合的算法进行讨论和仿真。结果表明，对n层符号，选取其中I层采用ML算法，剩下的n-1层采用OSIC算法，不会大幅增加原OSIC算法复杂度，且误码率性能大幅提高。同时指出，基于OSIC思想，对瞬时信噪比（SNR）最大的符号采用ML算法，余下的符号采用OSIC算法解码，可以逼近ML算法的性能。

On Improving Algorithms in Receivers of V-BLAST Systems

This paper summarizes algorithms used in receivers in V-BLAST systems, and focuses on combination algorithms of Maximum Likelihood （ML） and Ordered Successive Interference Cancellation （OSIC）. The results of simulation show that 1 layer with ML detection and the rest n- 1 with OSIC detection could obtain better Bit Error Rate （BER） per- formanee, costing no more complexity than original OSIC algorithms. Meanwhile, with the thought of OSIC, choosing the layer with the maximum transient signal to noise ratio could provide a much better performance, nearly to ML algorithm.