利用信源残留冗余实现高容错数字分接

doi:10.3778/j.issn.1002-8331.2011.02.043

计算机工程与应用 ›› 2011, Vol. 47 ›› Issue (2): 139-142.DOI: 10.3778/j.issn.1002-8331.2011.02.043

• 数据库、信号与信息处理 • 上一篇下一篇

利用信源残留冗余实现高容错数字分接

相蔚蔚^1，2，陆佩忠²

1.解放军信息工程大学信息工程学院，郑州 450002
2.西南电子电信技术研究所上海分所，上海 200434

收稿日期:2009-04-23 修回日期:2009-06-15 出版日期:2011-01-11 发布日期:2011-01-11
通讯作者: 相蔚蔚

High error-resilient digital demultiplexing using residual source redundancy

XIANG Weiwei^1，2，LU Peizhong²

1.Information Engineering Institute，Information Engineering University，Zhengzhou 450002，China
2.Shanghai Substation，Southwest Institute of Electron & Telecommunications Technology，Shanghai 200434，China

Received:2009-04-23 Revised:2009-06-15 Online:2011-01-11 Published:2011-01-11
Contact: XIANG Weiwei

摘要/Abstract

摘要： 正确的数字分接是PDH数字群路信号信息还原的前提。在高误码信道环境下，为实现可靠通信，提出了利用信源残留冗余来实现高容错数字同步分接的改进算法。算法通过挖掘PDH数据最底层的PCM信号中所残留的冗余，根据码速调整对PCM残留冗余的影响，来增强码速恢复的判断依据。实验的仿真结果显示算法较为彻底地解决了群路分接的滑帧问题，在容错性和准确性上比ITU推荐的多数判决法有显著提高，且较低的计算复杂性使其易于用软硬件实现。由于揭示的规律在大容量PDH通信中是普遍存在的，因此提出的算法具有很大的实用性。

关键词: 联合信源信道译码, 数字分接, 码速调整, 多数判决法

Abstract: Correct digital demultiplexing is the precondition of recovering the information in PDH signals.To realize the reliable communication in the high BER environment，an improved high error-resilient digital demultiplexing method using residual source redundancy is proposed.The originality of this approach is based on a rule discovered in this paper.That is it has plenty of redundancy information in the PCM sources of base-group data.Simulation results show that the performance of this method can be significantly improved compared with the majority decision recommended by ITU.It has low computational complexity and can be implemented easily in software or hardware.Furthermore，for the rule exploited exists widely in PDH communication systems，this approach has great practicability.

Key words: joint source-channel decoding, digital demultiplexing, justification, majority decision

中图分类号:

TN914.3

相蔚蔚^1，2，陆佩忠². 利用信源残留冗余实现高容错数字分接[J]. 计算机工程与应用, 2011, 47(2): 139-142.

XIANG Weiwei^1，2，LU Peizhong². High error-resilient digital demultiplexing using residual source redundancy[J]. Computer Engineering and Applications, 2011, 47(2): 139-142.

利用信源残留冗余实现高容错数字分接

High error-resilient digital demultiplexing using residual source redundancy

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