高灵敏度GPS导航算法分析  

Analysis on High Sensitivity GPS Navigation Methods

作　　者：许仕龙[1] 李斌[1] 李哲[1] 田爱国[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

出　　处：《无线电工程》2011年第10期37-39,共3页Radio Engineering

摘　　要：为了实现在室内和城市等低信噪比环境下的全球定位系统(GPS)导航,介绍了导航终端捕获卫星信号的基本原理。分析了相干积分算法、非相干积分算法、差分相关算法和圆周相关算法4种主要的卫星捕获算法,在此基础上提出了相干积分算法结合差分相关算法的高灵敏度GPS导航芯片设计方案。通过仿真分析,该芯片能够在15 dBHz的低载噪比环境下实现对卫星信号的正常捕获。In order to realize GPS navigation in low SNR environment,such as indoor and city environments,the basic principle of signal acquisition in navigation receiver is introduced.Several common acquisition methods of satellite signal such as coherent integration,non-coherent integration,differential correlation integration and circular correlation integration are analyzed.Coherent integration and differential correlation integration are chosen finally to design the high sensitivity GPS chip,and the results of simulation demonstrate that the normal acquisition for satellite signal can be successfully implemented by using this chip in such 15 dBHz CNR environment.

关 键 词：高灵敏度 室内 导航 GPS 

分 类 号：TN967.1[电子电信—信号与信息处理]