弱信号下软件GPS接收机全比特捕获算法  

Whole bit acquisition algorithm in software GPS receiver in weak signal environment

作　　者：姜冰心[1] 张中兆[1] 孟维晓[1] 

机构地区：[1]哈尔滨工业大学通信技术研究所,黑龙江哈尔滨150001

出　　处：《电子技术应用》2008年第9期99-102,共4页Application of Electronic Technique

基　　金：国家863高技术研究发展计划基金项目(2007AA12Z338)

摘　　要：针对弱信号分析了 GPS 捕获阶段采用的相干、非相干、差分相干累积算法,提出了全比特捕获算法,并给出完整的捕获实现方案。通过算法仿真实验验证了算法的有效性。结果表明此方案能有效改善捕获性能,提高捕获效率。The coherent cumulative algorithm, non-coherent cumulative algorithm and differential coherent cumulative algorithm in weak GPS signal acquisition phase are analyzed, and gives an integral acquisition scheme based on whole bit acquisition algorithm. The effectiveness of the algorithm has been proved by software simulation experiments. The results show that this scheme is able to improve acquisition performance effectively which enhances the acquisition efficiency.

关 键 词：GPS接收机 捕获方法 全比特算法 弱信号 均衡相关 

分 类 号：TN914.42[电子电信—通信与信息系统] P228.4[电子电信—信息与通信工程]