华中科技大学学报（自然科学版）2013，Vol.41Issue(7)：42-46,5.
基于差分判决的GPS弱信号长比特相干捕获算法
Long-bit coherent acquisition algorithm for weak GPS signals using differential decision
摘要
Abstract
A long-bit coherent acquisition algorithm based on differential decision for global positioning system (GPS) weak signals was proposed.In this algorithm,differential decision and circular correlation manners were used to achieve fast positioning for transition edge of the navigation data and parallel searching for code phase with longer coherent accumulation time and the faster acquisition speed.Results show that compared with the traditional half-bit coherent accumulation algorithm,simulation results show that the acquisition performance of the algorithm has an improvement by 4～6 dB · Hz,and the shorter the differential block is,the better the acquisition performance is.关键词
全球定位系统/弱信号捕获/差分判决/相干累积/捕获算法Key words
global positioning system/ weak signal acquisition/ differential decision/ coherent accumulation/ acquisition algorithm分类
信息技术与安全科学引用本文复制引用
吴皓威,刘远,杨力生,李恩玉..基于差分判决的GPS弱信号长比特相干捕获算法[J].华中科技大学学报（自然科学版）,2013,41(7):42-46,5.基金项目
中央高校基本科研业务费资助项目(CDJZR12160009) （CDJZR12160009）
重庆市科技攻关项目院士专项资助项目(cstc2011ggys0001). （cstc2011ggys0001）
