| 双重迭代置信传播空时编码调制及其在准静态MIMO衰落信道下的性能 |
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| 引用本文： | 芮华,徐大专.双重迭代置信传播空时编码调制及其在准静态MIMO衰落信道下的性能[J].南京航空航天大学学报,2005,37(1):48-51. |
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| 作者姓名： | 芮华 徐大专 |
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| 作者单位： | 南京航空航天大学信息科学与技术学院,南京,210016 |
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| 基金项目： | 航空科学基金 (0 3 F5 2 0 42 )资助项目，江苏省自然科学基金 (BK2 0 0 3 0 89)资助项目。 |
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| 摘 要： | 提出一种结合低密度校验码和空时分组码的置信传播编码调制方案，并对其在准静态MIMO衰落信道下成对差错概率及最优星座选择进行了分析，并给出了相应的参考设计准则。为防止过多错误反馈造成译码失效，提出采用内、外双重迭代方式提高系统的鲁棒性。同时．由于该方案LDPC(Low—density parity—check)码校验矩阵作为迭代终止判决准则，使得迭代算法的平均复杂度降低。
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| 关 键 词： | 低密度校验码 空时编码 比特交织编码调制 迭代译码 MIMO衰落信道 |
| 文章编号： | 1005-2615(2005)01-0048-04 |
| 修稿时间： | 2004年4月11日 |
Performance of Belief Propagation Space-Time Coded Modulation with Iterative Decoding over Quasi-Stationary Fading MIMO Channel |
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| RUI Hua,XU Da-zhuan.Performance of Belief Propagation Space-Time Coded Modulation with Iterative Decoding over Quasi-Stationary Fading MIMO Channel[J].Journal of Nanjing University of Aeronautics & Astronautics,2005,37(1):48-51. |
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| Authors: | RUI Hua XU Da-zhuan |
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| Abstract: | To combine low-density parity-check (LDPC) codes wit h space-time block codes (STBC), a scheme for belief propagation space time coded modulation with iterative decoding (BPSTCM-ID) is proposed. The pair error pro bability performance in quasi-stationary fading MIMO channel and design rules f or multiple quadrature amplitude modulation (MQAM) constellations are also analy zed. Both outer and inner iterations are used to avoid too much error feedback w hich may cause decoding failures. The scheme introduces check equations of LDPC codes to terminate both iterations, thus reducing the average decoding complexit ies. Simulation results show that the BPSTCM-ID is effective and its performanc e is better than that of the other three schemes. |
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| Keywords: | low-density parity-check code space-time blo ck codes bit-interleaved coded modulation MIMO |
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