| DVB-S2标准中联合LDPC译码的16-APSK星座迭代软判决算法研究 |
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| 引用本文： | 许大正,刘爱军.DVB-S2标准中联合LDPC译码的16-APSK星座迭代软判决算法研究[J].宇航学报,2011,32(3):634-639. |
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| 作者姓名： | 许大正 刘爱军 |
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| 作者单位： | 解放军理工大学通信工程学院，南京 210007 |
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| 基金项目： | 收稿日期：2010-01-26; 修回日期：2010-02-11 |
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| 摘 要： | 对DVB-S2标准中的16-APSK（幅度相移键控）星座软判决算法展开研究，在比特LLR（对数似然比）软判决算法的基础上提出了一种基于联合LDPC（低密度奇偶校验码）译码的星座迭代软判决改进算法。经仿真分析发现，该改进算法在具有与原算法相近的误码性能的同时至少降低了一半的计算量，具有较强的实用价值。
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| 关 键 词： | DVB-S2标准 幅度相移键控 比特对数似然比 低密度奇偶校验码 软判决 |
| 收稿时间： | 2010-01-26 |
Research on Combined LDPC Decoding Iterative Soft-Decision Demodulation Algorithm of 16-APSK in DVB-S2 |
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| XU Da-zheng,LIU Ai-jun.Research on Combined LDPC Decoding Iterative Soft-Decision Demodulation Algorithm of 16-APSK in DVB-S2[J].Journal of Astronautics,2011,32(3):634-639. |
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| Authors: | XU Da-zheng LIU Ai-jun |
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| Institution: | Institute of Communication Engineering, PLA University of Science and Technology, Nanjing 210007, China |
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| Abstract: | An iterative soft-decision demodulation algorithm of the 16-APSK(amplitude and phase shift keying) in DVB-S2 is investigated.An improved iterative algorithm on the basis of bit log-likelihood-rate(LLR) soft-decision algorithm based on joint low-density parity-check code(LDPC) decoding is proposed.Theoretical analysis and computer simulation show that the proposed algorithm has similar BER performance to original algorithm,while reduces by at least half of the computational effort.So the proposed algorithm h... |
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| Keywords: | DVB-S2 Amplitude and phase shift keying Bit log-likelihood-rate(LLR) Low-density parity-check codes(LDPC) Soft-decision |
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