| Turbo码译码算法在频率选择性信道中的修正 |
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| 引用本文： | 林家儒,吴伟陵,冯志勇.Turbo码译码算法在频率选择性信道中的修正[J].北京邮电大学学报,2001,24(1):6-11. |
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| 作者姓名： | 林家儒 吴伟陵 冯志勇 |
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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. 北京邮电大学继续教育学院， 北京 100876 |
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| 基金项目： | 国家自然科学基金资助项目(69896243) |
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| 摘 要： | 分析了宽带DS／CDMA系统在多径瑞利信道中的性能，针对多径频率选择性信道对Turbo码译码提出了修正算法－由Rake接收输出经最大比例合并等处理后的信号，除以信道幅度参数ai^m的平方之和，以高斯分布计算Turbo码译码的γ函数，并进行Turbo码译码，系统仿真显示，该修正算法极大地提高了系统的误码性能。
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| 关 键 词： | 多径衰落 瑞利衰落 Turbo码 DS／CDMA 频率选择性信道 译码算法 |
| 文章编号： | 1007-5321(2001)01-0006-06 |
Modification of Decoding Algorithm of Turbo Code on Frequency-Selective Channels |
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| LIN Jia ru ,WU Wei ling ,FENG Zhi yong.Modification of Decoding Algorithm of Turbo Code on Frequency-Selective Channels[J].Journal of Beijing University of Posts and Telecommunications,2001,24(1):6-11. |
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| Authors: | LIN Jia ru WU Wei ling FENG Zhi yong |
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| Affiliation: | LIN Jia ru 1,WU Wei ling 1,FENG Zhi yong 2 |
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| Abstract: | The performance of DS/CDMA systems on multipath fading Rayleighchannels is analyzed. And proposes a modified decoding algorithm of Turbo code on multipath frequency-selective fading channels,i.e.the signal with maximum ratio combiner divides by the all square of amplitudes of the channel,calculate the probability function γ for Turbo code,and then decode the signal as Turbo decoding.Computer simulations indicate that the modified algorithm improves greatly the performance of DS／CDMA systems on multipath frequency-selective fading channels and is a promising algorithm. |
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| Keywords: | multipath fading Rayleigh fading Turbo code DS/CDMA |
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