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QUASI-OPTIMAL T-VVA IN CODED MIMO SYSTEMS

QUASI-OPTIMAL T-VVA IN CODED MIMO SYSTEMS
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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.
机构地区 ElectronicsDepartment
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)
关键词 Multi-Input-Multi-Output (MIMO) Vector Viterbi Algorithm (VVA) Threshold VVA(T-VVA) MIMO 向量维特比算法 编码 T-VVA T-VVA 无线通信
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