MIMO-OFDM系统中CSI Viterbi译码算法研究  

Research on CSI Viterbi Decoding Algorithm in MIMO-OFDM System

作　　者：王恒辉[1] 叶梧[1] 张浩[1] 龚汉东[1] 

机构地区：[1]华南理工大学电信学院,广州510640

出　　处：《科学技术与工程》2006年第4期363-366,370,共5页Science Technology and Engineering

基　　金：广东自然科学基金(31391)资助

摘　　要：Viterbi译码器是通信系统中应用非常广泛的译码器。与其他单载波调制技术相比,OFDM系统中的Viterbi译码有其特别之处,可以根据在信道均衡时所得到的信道频域响应系数为译码算法提供判决权重,被称为CSIViterbi译码算法。首先介绍了OFDM系统的CSIViterbi译码器算法,然后以V-BLAST为例推导出MIMO-OFDM系统中的CSIViterbi译码器算法,并通过仿真证明使用CSIViterbi算法能有效改善系统的性能。Viterbi decoder is widely used for communications systems. Comparing to other Per Carrier technologies, Viterbi decoder has its own specialties in OFDM system, it means frequency domain response coefficient obtained under the condition of channel equalization can provide decoding algorithm with weight for decision, which is called CSI Viterbi Algorithm. CSI Viterbi Algorithm is introduced in OFDM system, then CSI Viterbi Algorithm in MIMO-OFDM system is deduced based on an example of V-BLAST , and simulations prove that CSI Viterbi Algorithm can improve system performance effectively.

关 键 词：MIMO—OFDM VITERBI译码算法 CSI 

分 类 号：TN911.23[电子电信—通信与信息系统]