GPS软件接收机的信号捕获和跟踪  

Acquisition and Tracking for GPS Software Receiver

作　　者：鲍雍荣[1] 李振波[1] 陈佳品[1] 

机构地区：[1]上海交通大学微纳科学技术研究院微系统与集成技术研究所,上海200030

出　　处：《微处理机》2008年第1期121-123,共3页Microprocessors

基　　金：国家自然科学基金资助项目(10477013;60475037)

摘　　要：由于GPS软件接收机的高度灵活性,其应用也越来越广泛。这里我们使用Zarlink的GP2015和GP4020硬件电路接收卫星信号,将其降至中频IF,将模拟信号采样转为数字信号。之后将数字信号传送给PC机,在PC机上用Matlab对接收到的信号进行捕获和跟踪,之后将得到的GPS导航信号传给后面的处理模块,最终得到位置坐标。GPS software receiver is becoming more and more popular because of its flexibility. Hereby we are using an external hardware circuit board, which consists of Zarlink GP 2015 and GP 4020, to receive the GPS signal, convert it to IF and sample it into digital signal. Then after transferring the signal to the PC, do the acquisition and racking using Matlab. After that we can get the navigation information and we pass the information to the following processing module and get the user position in the end.

关 键 词：软件接收机 C/A码 多普勒频移 循环相关 快速傅立叶变换 

分 类 号：TN967.1[电子电信—信号与信息处理]