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计算机工程 ›› 2011, Vol. 37 ›› Issue (10): 81-83. doi: 10.3969/j.issn.1000-3428.2011.10.027

• 网络与通信 • 上一篇    下一篇

一种并行Turbo译码交织设计方案

李林艳,谭晓衡   

  1. (重庆大学通信工程学院,重庆 400030)
  • 出版日期:2011-05-20 发布日期:2011-05-20
  • 作者简介:李林艳(1985-),女,硕士研究生,主研方向:移动通信;谭晓衡,教授、博士
  • 基金资助:
    重庆市自然科学基金资助项目(2008BB2168)

Interleaving Design Scheme for Parallel Decodable Turbo Codes

LI Lin-yan, TAN Xiao-heng   

  1. (College of Communication Engineering, Chongqing University, Chongqing 400030, China)
  • Online:2011-05-20 Published:2011-05-20

摘要: 并行Turbo译码提高了数据吞吐量,但同时也降低了译码性能。为此,分析并行Turbo译码中的无冲突交织条件,介绍一种行列随机交织器并对其改进,将S-距离规则用于其交织过程,使每列(行)相同位置产生的随机数之间的距离绝对值大于等于S。仿真结果表明,与行列随机交织器相比,改进方案在交织后能提高数据的分散度,增大每个子译码器内的相邻数据的距离,降低译码的误码率。

关键词: Turbo码, 并行Turbo译码, 交织, 无冲突, S-距离

Abstract: Parallel Decodable Turbo Codes(PDTC) increases data throughput, while reduces the decoding performance. This paper analyzes the collision free interleaving condition in PDTC, introduces row column random interleaver and improves it, uses S-random regulation into interleaving, makes the same column(row) position data distance increase to S at least after interleaving. The contrast simulation to row column random interleaver shows that the improved design scheme can raise the data dispersion, enlarge the neighboring data distance in every processor, make the lower code weight better, and increase the bit error rate performance.

Key words: Turbo codes, Parallel Decodable Turbo Codes(PDTC), interleaving, collision free, S-random

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