低信噪比下独特码检测  

THE DETECTION OF UNIQUE WORD AT LOWER SNR

作　　者：张炬[1] 向敬成[1] 朱中梁[2] 

机构地区：[1]电子科技大学电子工程学院,成都610054 [2]西南电子电信技术研究所,成都610031

出　　处：《电子与信息学报》2001年第11期1116-1122,共7页Journal of Electronics & Information Technology

摘　　要：该文分析了时分多址(TDMA)通信系统中独特码(UW)的检测和在低信噪比下独特码检测器的设计。提出了一种基于最大似然准则的通用的独特码检测器的工程实现方案。仿真结果表明它的性能比传统的硬判决-门限检测方法在码长为16和低信噪比条件下获得大约3—4dB的改善。该文所研究的独特码检测器已经应用于新近开发的通信系统中。This paper describes the principles of Unique Word(UW) detection and the design methods for a UW-detector at lower SNR. An engineering solution for a general purpose UW-detector based on maximum likelihood criteria is proposed. The simulation results show a 3-4dB improvement over the often employed hard-decision/threshold detection when the length of UW is 16 and the SNR is low. The developed UW-detectors have been used in auther's recent communication systems.

关 键 词：独特码 信噪比 信号检测 

分 类 号：TN911.23[电子电信—通信与信息系统]