TDMA卫星通信系统突发同步的性能研究  

Study on Performance of Burst Synchronization in TDMA Satellite Communication System

作　　者：周文玉[1] 张献民[2] 郝学坤[1] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]总参第六十一研究所,北京100039

出　　处：《无线电通信技术》2009年第3期26-28,61,共4页Radio Communications Technology

摘　　要：突发载波捕获和同步是TDMA系统的关键技术,使用数据序列辅助判决可有效缩短该处理过程需要的时间;在低接收信噪比下使用CAZAC序列的相关处理能够获得较高的突发捕获性能;比较了CAZAC序列和"1010"序列的载波和时钟同步误差估计性能,分析了它们在低信噪比门限时对信号快速捕获能力的影响。提出了2种序列组合应用实现载波快速同步的方案,完成信号捕获和载波估计功能。Burst carrier capture and synchronization in TDMA satellite communication system is a key technique, and the processing time can be effectively reduced by using data sequence directed decision. The method of CAZAC sequence correlation offers the better characteristics of burst capture at low Eb/N0. This paper compares the estimate performances of carrier and timing synchronization error of the preamble sequence of CAZAC and ＂1010＂ and analyzes the influence of fast capture signals at low Eb/N0. We propose a fast carrier synchronization scheme by combining the two sequences to accomplish capture and estimate of burst carrier.

关 键 词：突发捕获 相干解调 载波同步 前导序列 

分 类 号：TN927[电子电信—通信与信息系统]