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Turbo码译码算法在频率选择性信道中的修正

, PP. 6-11

Keywords: 多径衰落,瑞利衰落,Turbo码,DS/CDMA

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Abstract:

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αmi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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