| LDPC-Coded MIMO-OFDM系统的一种判决反馈信道估计算法 |
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| 引用本文： | 郑翔,周志杰,张文强.LDPC-Coded MIMO-OFDM系统的一种判决反馈信道估计算法[J].军事通信技术,2008(3). |
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| 作者姓名： | 郑翔 周志杰 张文强 |
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| 作者单位： | 解放军理工大学通信工程学院电信工程系; |
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| 摘 要： | 研究了LDPC编码在MIMO-OFDM系统中的应用,提出了基于LDPC编码的MIMO-OFDM系统的一种改进判决反馈信道估计算法,该算法一方面利用多步预测和干扰对消技术改进了判决反馈算法的精度,另一方面利用空时解码后的序列和LDPC译码后的序列进行了两级反馈信道估计。该算法在利用LDPC码优异的低误码性能改善信道估计精度的同时,有效地改进了LDPC帧过长导致时变信道条件下的信道估计不精确的问题。
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| 关 键 词： | 信道估计 判决反馈算法 空时解码 |
Channel Estimation Algorithm Using DFE of LDPC-coded MIMO-OFDM System |
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| ZHENG Xiang,ZHOU Zhi-jie,ZHANG Wen-qiang.Channel Estimation Algorithm Using DFE of LDPC-coded MIMO-OFDM System[J].Journal of Military Communications Technology,2008(3). |
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| Authors: | ZHENG Xiang ZHOU Zhi-jie ZHANG Wen-qiang |
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| Institution: | ZHENG Xiang,ZHOU Zhi-jie,ZHANG Wen-qiang(Department of Telecommunications Engineering ICE,PLAUST,Nanjing 210007,China) |
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| Abstract: | Researching the application of LDPC in MIMO-OFDM system,a new channel estimation algorithm of LDPC-based MIMO-OFDM System was proposed.The precision of DFE was improved using multi-step prediction and interference cancel in the algorithm.Feedback channel estimations were carried out using the output sequences of space-time decoder and LDPC decoder in turn.Inaccuracy resulted from the excessively long LDPC frame in time-varying channel was ameliorated effectively,while the precision of channel estimation bei... |
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| Keywords: | channel estimation decision feedback estimation space-time decode |
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