GPS软件接收机信号处理算法  

Signal processing algorithms for GPS software receivers

作　　者：钱镱[1] 伍蔡伦[1] 陆明泉[1] 冯振明[1] 

机构地区：[1]清华大学电子工程系,北京100084

出　　处：《清华大学学报（自然科学版）》2009年第8期1122-1125,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国防科工委专项资助课题

摘　　要：为了在通用处理器上实现GPS软件接收机功能,提出了一套适用于GPS软件接收机的信号处理算法。考虑到GPS软件接收机与传统的GPS接收机的信号处理算法在捕获、跟踪、观测量提取等诸多方面的不同,该算法以本地预存的载波表与码表来产生跟踪中需要的本地载波与伪码,增加了软件接收机的信号处理效率。基于该算法,在M ATLAB平台上实现了一个非实时的GPS软件接收机,并利用实际卫星信号进行了测试。测试结果表明,其定位结果的误差标准差为6.3m。该研究为实时GPS软件接收机的实现打下了基础。The global positioning system （GPS） receiver architecture was analyzed to develop a baseband signal processing algorithm for GPS receiver using general-purpose microprocessors. The signal processing scheme in traditional receivers was modified to create a software GPS receiver. During tracking, the local carrier and code are generated from a pre-stored carrier and code table, which reduces the computational burden. A non real-time GPS software receiver was implemented on a MATLAB platform and tested with the actual satellite signals. The test shows that the standard derivation of the positioning errors was 6.3 m. The work lays a foundation for implementation of a real-time GPS software receiver.

关 键 词：扩频通信 全球定位系统(GPS) GPS软件接收机 软件无线电 

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]