QUASI-OPTIMAL T-VVA IN CODED MIMO SYSTEMS  

作　　者：WangBing ZhaoYuping ZouLi LiangQinglin 

机构地区：[1]ElectronicsDepartment,PekingUniversity,Beijing100871,China

出　　处：《Journal of Electronics(China)》2005年第2期125-130,共6页电子科学学刊（英文版）

摘　　要：Vector Viterbi Algorithm (VVA) is an optimal decoding algorithm in multiplechannel environments. It can be applied in coded Multi-Input-Multi-Output (MIMO) systems,but its complexity makes its application difficult. This paper proposes adaptive Threshold VVA (T-VVA) for coded MIMO system. By adaptively choosing a threshold according to Signal to Noise Ratio (SNR) of channel, T-VVA only searches a subset of branchesfor path extension. The easy method to decide the threshold is also derived based on Cheroff bound. Simulation results show that the near-optimal decoding results can be obtained with largely reduced complexity.Vector Viterbi Algorithm (VVA) is an optimal decoding algorithm in multiple-channel environments. It can be applied in coded Multi-Input-Multi-Output (MIMO) systems, but its complexity makes its application difficult. This paper proposes adaptive Threshold VVA (T-VVA) for coded MIMO system. By adaptively choosing a threshold according to Signal to Noise Ratio (SNR) of channel, T-VVA only searches a subset of branches for path extension. The easy method to decide the threshold is also derived based on Cheroff bound. Simulation results show that the near-optimal decoding results can be obtained with largely reduced complexity.

关 键 词：Multi-Input-Multi-Output (MIMO) Vector Viterbi Algorithm (VVA) Threshold VVA(T-VVA) 

分 类 号：TN92[电子电信—通信与信息系统]