基于匹配滤波方法的直接序列扩频系统伪码捕获性能分析  

Performance analysis of a matched-filter PN code acquisition for direct-sequence spread-spectrum systems

作　　者：许晓勇[1] 陈华明[1] 王飞雪[1] 

机构地区：[1]国防科技大学电子科学与工程学院卫星导航研发中心,长沙410073

出　　处：《测绘科学》2008年第S1期104-106,共3页Science of Surveying and Mapping

基　　金：国防科技预研基金资助项目(106010304);新世纪优秀人才支持计划基金资助项目(NCET-04-0995)

摘　　要：通常对匹配滤波法伪码捕获的性能分析都假设检测量独立。但对于实际的捕获系统,由于相邻检测量之间有公共的观测数据段,当伪码搜索间隔小于一个码片时,相邻检测量之间并不独立。建立了此条件下的基于匹配滤波的伪码捕获模型,并给出了高效的虚警分组验证策略,定义了该模型下的检测概率和虚警概率。用MonteCarlo方法分析了伪码搜索步进以及伪码相位偏移残差对捕获性能的影响。研究结果可用于指导扩频通信和导航系统接收机的设计。Usually the performance analysis of a matched-falter PN code acquisition was carried out on the assumption that the de- tection measurements were independent.For practical system,the adjacent detection measurements are dependent when PN search size is smaller than one chip,for they had common input data.A matched-filter PN code acquisition model was formed for direct-sequence spread-spectrum systems.An efficient strategy of grouping false-alarm testing was provided.Probabilities of detection and false alarm...

关 键 词：扩频 伪码捕获 匹配滤波器 数值分析 

分 类 号：TN914.42[电子电信—通信与信息系统]