| LDPC码在RICE信道中的性能分析 |
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| 引用本文： | 林家儒,吴伟陵.LDPC码在RICE信道中的性能分析[J].北京邮电大学学报,2004,27(2):48-53. |
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| 作者姓名： | 林家儒 吴伟陵 |
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| 作者单位： | 北京邮电大学 信息工程学院, 北京 100876 |
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| 摘 要： | 对非规则LDPC(low density parity codes)码在RICE信道的性能进行了分析和仿真,修正了BP(belief propagation)译码算法,证明了RICE信道满足对称性,给出了RICE信道译码稳定性条件,推导出了RICE信道的Shannon容量限。采用VC编程进行了仿真,仿真结果表明在码长N＝3 072、码率R＝1/3时,与Shannon限相差2 dB左右。进一步表明了LDPC码在包括RICE信道在内的各种信道中的性能都是非常优良的。
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| 关 键 词： | 低密度校验码 衰落信道 莱斯信道 |
| 文章编号： | 1007-5321(2004)02-0048-06 |
| 收稿时间： | 2003-01-14 |
| 修稿时间： | 2003年1月14日 |
Analysis of Performance of LDPC on Rician-Fading Channels |
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| LIN Jia-ru,WU Wei-ling.Analysis of Performance of LDPC on Rician-Fading Channels[J].Journal of Beijing University of Posts and Telecommunications,2004,27(2):48-53. |
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| Authors: | LIN Jia-ru WU Wei-ling |
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| Affiliation: | Information Engineering School, Beijing University of Posts and Telecommunications, Beijing 100876, China |
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| Abstract: | This paper analyzes and simulates the performance of low density parity check codes (LDPC) on Rician fading channels, and modifies BP decoding algorithm, proves the symmetry and shows the stability conditions of the channels calculates the Shannon limit of Rician channels. Using Visual C~(++) programming to simulate the performance, the result indicates that when code length N=3 072, code rate R=1/3, the distance with Shannon limit is about 2 dB. The performance of LDPC is also very effective on all kind of channels, including Rician channels. |
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| Keywords: | LDPC fading channel RICIAN channels |
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