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低信噪比条件下Turbo编译码算法研究及性能评估

nalysis and Evaluation for Turbo Coding and Decoding Arithmetic Based on Low SNR

中文摘要英文摘要

由于Turbo码优异的纠错性能,CDMA2000与WCDMA将其作为候选的信道编码方案。本文研究了Turbo码的基本原理和编解码算法,在此基础上对Turbo码编解码系统进行了低信噪比环境下的计算机仿真。本文设计的Turbo码编解码采用了伪随机交织器,它将低重量输入信息序列产生低重量编码序列的关系打破,提高了Turbo码编解码系统性能。系统仿真结果及分析表明有译码迭代次数、RSC分量码,交织器大小与交织器图等几个因素会影响Turbo码编解码系统性能。

ue to their excellent performance of error correcting, turbo codes have selected channel coding schemes for CDMA2000 and WCDMA. This paper studies the basic principle of turbo codes and their coding and decoding algorithms, on the basis of which the computer simulation are made in the environment of lower SNR. Additionally, the interleaver we designed for the Turbo encoder and decoder system adopts the pseudo-random interleaver, it breaks the relation that low weigh input sequence produces low weigh code sequence, and improves the performance of the Turbo encoder and decoder systems. Moreover, our simulation results and analysis for the Turbo code systems show that some factors, such as the number of the iterations of the decoder, RSC codes, the length of interleaver, and the interleaver map, will influence the performance of Turbo encoder and decoder systems.

黄和斌、肖扬

通信无线通信

无线通信urbo码LOG-MAP算法迭代译码

wireless communicationsTurbo codesLOG-MAP algorithmIterative decoding

黄和斌,肖扬.低信噪比条件下Turbo编译码算法研究及性能评估[EB/OL].(2004-05-20)[2025-08-02].http://www.paper.edu.cn/releasepaper/content/200405-62.点此复制

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