基于有限状态自动机的高容错数字分接算法  

High error-resilient digital demultiplexing using finite state machine

作　　者：相蔚蔚[1,2] 陆佩忠[2] 

机构地区：[1]解放军信息工程大学信息工程学院,河南郑州450002 [2]西南电子电信技术研究所,上海200434

出　　处：《电子技术应用》2009年第8期119-122,126,共5页Application of Electronic Technique

基　　金：国家自然科学基金(60673082);教育部全国优秀博士学位论文作者专项基金(200084)等资助项目

摘　　要：在高误码信道环境下,为实现高速大容量同步通信,提出了一种高容错的数字分接算法。在此基础上,建立了有限状态自动机模型,并巧妙利用信道纠错译码的思想设计分接算法,以增强PDH信号码速调整状态的可预测性。实验的仿真结果显示新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软硬件的实现。由于文中揭示的规律在大容量PDH通信中是普遍存在的,因此提出的新算法具有很大的实用性。To realize the high-speed synchronized communication in the high BER environment, a new high error-resilient digital demuhiplexing method using FSM is proposed in this paper. FSM models are established according this rule, which increase the correctness of deciding the justification states. Simulation results show that the performance of our new 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 rules exploited in the paper exist widely in PDH communication systems, our new approach has great practicability.

关 键 词：数字分接 码速调整 有限状态自动机 极大后验概率 多数判决法 

分 类 号：TN914[电子电信—通信与信息系统]