| 衰落信道下卷积码的软判决译码 |
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| 引用本文： | 隋爱芬,杨义先,袁东风,李作为.衰落信道下卷积码的软判决译码[J].电子学报,2001,29(6):849-852. |
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| 作者姓名： | 隋爱芬 杨义先 袁东风 李作为 |
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| 作者单位： | 1. 北京邮电大学信息工程学院,北京 100876;2. 山东大学电子工程系,山东济南 250100 |
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| 基金项目： | 国家自然科学基金!(No.6 9872 0 2 0,No .6 9882 0 0 2 ,No .6 0 0 730 49)，东南大学移动通信国家重点实验室开放基金!(No .W990 0 1) |
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| 摘 要： | 本文将交织、信道输出软信息、信道特征软信息相结合,研究Rayleigh衰落信道下卷积码的Viterbi软判决译码,在利用和不利用信道状态信息(CSI)两种情况下给出软判决的支路度量计算公式和性能仿真结果,计算了卷积码的性能上界;研究了解调器输出量化门限(量化级数目、量化间距)对译码性能的影响.结果与硬判决译码及AWGN信道的相关结论进行了比较.
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| 关 键 词： | 软判决Viterbi译码 卷积码 信道状态信息(Channel State Information) 量化门限 衰落信道 |
| 文章编号： | 0372-2112 (2001) 06-0849-04 |
| 收稿时间： | 2000-01-31 |
Soft Decision Decoding for Convolutional Codes in Fading Channels |
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| SUI Ai fen ,YUAN Dong feng ,Li Zuo wei ,YANG Yi xian.Soft Decision Decoding for Convolutional Codes in Fading Channels[J].Acta Electronica Sinica,2001,29(6):849-852. |
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| Authors: | SUI Ai fen YUAN Dong feng Li Zuo wei YANG Yi xian |
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| Institution: | 1. Institute of Inform.Eng.,Beijing University of Posts & Telecom.,Beijing 100876,China;2. Dept.of Electrical Engineering,Shandong University,Jinan,Shandong 250100,China |
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| Abstract: | The paper investigates the performance of soft decision Viterbi decoding for convolutional codes in Rayleigh fading channels by using a new scheme that combines interleaving technique,soft output of the channel and the information about the channel.The formulations for computing the soft decision metrics with or without Channel State Information (CSI) are presented and the performance gains are demonstrated.In addition,we discuss the influences of quantizer thresholds on the decoding performance.The results are compared with the corresponding conclusions in AWGN channels. |
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| Keywords: | soft decision Viterbi decoding convolutional codes Channel State Information (CSI) quantizer thresholds fading channels |
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