Method of Short Interleaver Design for Turbo Codes
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摘要: 短交织器的结构对Turbo码的性能有很大的影响,通过探讨Turbo码编码器中反馈最小多项式的周期性和序列的可整除性问题,把可整除序列变为不可整除序列交织器,从而获得高码重的码字,并给出一种基于输入信息序列周期性特性的短交织器的设计方法.仿真结果表明是一种很有效的设计方法.Abstract: The interleaver structure plays a very important role to the bit error rate performance of Turbo code. The periodic character of the feedback minimum polynomial and the divisibility character of the input information sequences were analyzed. Some interleavers were found that can change the divisible input sequences into indivisible ones, and the high Hamming weight codes can be obtained. A designing method for the short interleaver based on periodic character of the input information sequences is presented. It is proved to be an effective way by the simulation.
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Key words:
- error correcting codes /
- error code rate /
- simulation /
- Turbo codes /
- interleaver
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[1] Berrou C, Galvieus A,Thitimajshima P. Near Shannon limit error correcting coding and decoding:Turbo codes . Proceedings of ICC'93 ． Switzerland,1993．1064~1070． [2]Benedetto S, Montorsi G. Unveiling Turbo codes:Some results on parallel concatenated coding schemes[J]. IEEE Trans Inform Theory, 1996,42(2):409~428. [3]Perez C, Seghers J, Costello D J. A distance spectrum interpretation of Turbo codes[J].IEEE Trans Inform Theory,1996,42(6):1698~1709. [4]Dolinar S,Divsalar D. Weight distributions for turbo codes using random and nonrandom permutations . TDA progress rep 42-122,1995．56~65. [5]Eroz M, Hammons Jr A R. On the design of prunable interleavers for Turbo codes . IEEE VTC 49th .1999,2:1669~1673. -
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