| 一种低复杂度双二元卷积Turbo码译码算法 |
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| 引用本文： | 姜春强,唐震宇,甘 明. 一种低复杂度双二元卷积Turbo码译码算法[J]. 电讯技术, 2016, 56(4): 412-415. DOI: 10.3969/j.issn.1001-893x.2016.04.011 |
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| 作者姓名： | 姜春强 唐震宇 甘 明 |
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| 作者单位： | 1. 海装重庆局,成都,610036;2. 国网四川省电力公司,四川 自贡,643000;3. 中国西南电子技术研究所,成都,610036 |
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| 摘 要： | 双二元卷积Turbo码（ DB CTC)的非二进制编码使得译码复杂度增加，限制了其在某些实际通信工程中的使用。在最大后验概率（ MAP)译码算法的基础上，提出了一种优化算法，将译码的存储量和计算量降为原来的1/4。仿真结果表明：在不同编码长度和码率的情况下，优化算法与原算法性能相当；在误码率为10-5的条件下，两者的Eb/N0差异同样不大于0.1 dB。
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| 关 键 词： | 卷积Turbo码 Log-MAP算法 循环递归 低复杂度译码 |
A low-complexity decoding algorithm for double binary convolutional Turbo codes |
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| JIANG Chunqiang,TANG Zhenyu and GAN Ming. A low-complexity decoding algorithm for double binary convolutional Turbo codes[J]. Telecommunication Engineering, 2016, 56(4): 412-415. DOI: 10.3969/j.issn.1001-893x.2016.04.011 |
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| Authors: | JIANG Chunqiang TANG Zhenyu GAN Ming |
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| Affiliation: | JIANG Chunqiang;TANG Zhenyu;GAN Ming;Military Representative Bureau of Navy Equipment Academy in Chongqing;State Grid Sichuan Electric Power Company;Southwest China Institute of Electronic Technology; |
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| Abstract: | The double binary convolutional Turbo code ( DB CTC ) cannot be widely applied in some pro-jects due to the high-complexity of decoding algorithm. In this paper,a new decoding algorithm with low-complexity for DB CTC is proposed based on the classic maximum a posteriori probability( MAP) decoding algorithm. By using the proposed algorithm,the storage cost and the computation complexity decrease by 3/4 compared with previous algorithm. Simulation results show that,when the bit error rate( BER) is 10-5 , the Eb/N0 deference between the proposed algorithm and the previous algorithm is not larger than 0. 1 dB for various lengths of code and code-rates. |
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| Keywords: | conventional Turbo code Log-MAP algorithm cycle recursion low-complexity decoding |
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