Turbo码的距离特性及Viterbi译码方法
Distance Properties of Turbo-Codes and Viterbi Decoding Method
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摘要:Turbo码由递归系统卷积码(RSC)并行级联而成,从RSC码特有的距离特性和误码率限分析了Turbo码 的优异性能。根据码距特性提出了对角交织的优化交织法。在适当译码增益损失下,提出了Turbo码译码的 Viterbi译码实现方法,并用此方法进行了计算机仿真,证明了结论的正确性。
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关键词:
- 译码/
- 误码率/
- Turbo codes/
- Viterbi译码/
- 自由距离
Abstract:Turbo-codes are produced by parallel concatenation of recursive systemic codes (RSC), and its excellent performances are analyzed based on the free distance and bit error rate of the RSC codes. Adiago- nal interleave method is proposed based on the distance properties ofTurbo codes. With losing little gain, a viterbi decodingmethod to implementTurbo-codes decoding is putforward, withwhichthe correctness ofthe conclusions of this paper is proved by computer simulation.-
Key words:
- decoding/
- error code rate/
- Turbo-codes/
- Viterbi decoding/
- free distance
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