一种单频GPS软件接收机的设计实现  

Design of a Single Frequency GPS Software Receiver

作　　者：左启耀[1] 袁洪[2] 林宝军[2] 牛国朋[1] 

机构地区：[1]中科院空间中心 [2]中科院光电研究院,北京100080

出　　处：《计算机仿真》2008年第1期43-46,87,共5页Computer Simulation

基　　金：国家自然科学基金(40374054)

摘　　要：GPS软件接收机相对于硬件接收机更灵活,在一些特殊应用背景下易于实现更复杂的算法,从而提升了系统的性能,有着不可比拟的优势。文章致力于研究一种基于PC的单频GPS软件接收机。GPS信号下变频和对中频信号的采样模数转换、数据传输由射频前端、数据采集板实现,采样后的数字中频信号在PC中完成捕获、跟踪、导航信息解算,并给出最终定位结果。对数据采集硬件和信号处理算法的具体实现作了详细介绍,并给出了系统测试实采数据的处理结果,结果表明系统工作正常,静态定位精度可以满足要求。The GPS software recevier is more flexible than GPS hardware receiver. It upgrades the system performance and has unexampled advantage becase it is prone to realize more complex arithmetic under special background. The paper places emphasis on a single frequency GPS software recevier based on PC. The GPS signal gets down - coverted to an intermediate frequency by the RF front - end. Then the IF is sampled and transmitted to the PC by the data collection board. And all the data processing is done in PC, including signal acquisition, signal tracking and position calculations. The hardware that collects data and the algorithm of data processing are discussed in the paper. The system has been tested and the result indicates that the system works well and the precision is satisfactory.

关 键 词：全球定位系统 软件接收机 信号捕获 信号跟踪 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]