改进的DMR位同步算法  

Improved Bit-synchronization Algorithm of DMR

作　　者：乔宁[1] 孙鹏飞[1] 薛德友[1] 

机构地区：[1]哈尔滨工业大学通信技术研究所,哈尔滨黑龙江150001

出　　处：《通信技术》2012年第3期25-27,共3页Communications Technology

摘　　要：位同步是数字通信中最基本和最重要的环节。DMR标准建议的位同步算法在弱信号情况下的同步能力不够强,失步、重新建立同步都会中断通信,最坏情况下会导致通信失败。针对这一情况,提出了一种新的改进同步算法,并对其在弱信号环境的性能进行了仿真测试,获得了显著的改善效果。Bit-synchronization is the most essential and important procedure in digital communication.The current synchronous algorithm suggested by DMR is not robust enough in the poor quality input signal scenario,and the losing or re-establishing of synchronization would interrupt the communication,or in the worst case,lead to communication failure.An improved synchronous algorithm is proposed,the simulation on this new algorithm under poor-quality signal condition indicates a significant performance improvement.

关 键 词：DMR 位同步 时间窗 

分 类 号：TN929.52[电子电信—通信与信息系统]