基于DS/CDMA系统前缀码捕获性能分析  

The Analysis of the Preamble Acquisition Performance Based on DS/CDMA System

作　　者：王娟[1] 郑林华[1] 袁继兵[1] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073

出　　处：《微处理机》2007年第2期22-25,共4页Microprocessors

摘　　要：介绍了在DS/CDMA系统中采用巴克码作为前缀码对捕获性能的影响,提出了基于匹配滤波器前缀码捕获的改进方法。它不仅考虑了频偏和信息数据调制对捕获的影响,还同时实现了码同步和帧同步。用检测概率和虚警概率作为系统性能衡量指标,通过仿真实验证明该算法在前缀码快速可靠捕获方面是有效的。The article investigates the acquisition performance of using Baker sequence as the preamble in DS/CDMA systems. An improved method of the preamble is proposed based on digital matched filter. It not only considers the effect of frequency error and data modulation, but also realizes code synchronization and frame synchronization at the same time. By deriving the detection probability and false alarm probability, through the mixed analytical and numerical simulation results, we show that the proposed scheme performs well.

关 键 词：巴克码 同步 检测概率 虚警概率 

分 类 号：TN929.5[电子电信—通信与信息系统]