GNSS软件接收机关键技术研究及实现  

Research and Realization of Key Technology of GNSS Software Receiver

作　　者：隋建波[1] 赵静[2] 陈秀万[3] 张婷[3] 

机构地区：[1]中国地震应急搜救中心,北京100049 [2]北京师范大学资源学院,北京100875 [3]北京大学地球与空间科学学院,北京100871

出　　处：《科学技术与工程》2008年第16期4467-4472,共6页Science Technology and Engineering

基　　金：国家高技术研究发展计划(863计划)项目(2004AA133020)资助

摘　　要：首先介绍了国内外GNSS软件接收机技术的研究现状,对软件接收机的架构进行了详细的分析,系统地总结了其优点,并就GPS软件接收机的关键技术部分进行了具体实现。对于前端的硬件部分采用了中频信号采样模块,具体包括天线模块、射频处理模块与FPGA控制模块,之后以纯软件实现,主要包括可设置12通道的中频信号处理模块、信号的捕获和跟踪、导航电文存储及转换,并针对伪距定位算法部分实现了单点静态定位,考虑的误差源主要包括卫星钟误差、对流层误差、电离层误差和地球自转引起的偏差等。系统具体的定位算法及定位结果精度都经过详细的实测分析。此外,整个系统设计也具有良好的灵活性和可扩展性。Development of GNSS software receiver and introduces the basic structure of GNSS software receiver is first researched and analyzed,summarized its advantages and realizes the whole system regarding GPS software receiver.Except it implements the intermediate frequent signal sampling module for the hardware part,the system is all carried out in software way,including intermediate frequency signal processing module,the signal acquiring and tracking module,ephemeris storage and conversion module and single-point static positioning module aiming at pseudorange.The errors concerned in the system mainly contain satellite clock error,troposphere error,ionosphere error and the error caused by earth rotation.The positioning arithmetic and precision of results have been tested and analyzed.Besides,The entire system possesses friendly interface with fine flexibility and extensibility.

关 键 词：GNSS 软件接收机 循环相关 伪距 导航电文 

分 类 号：P228.4[天文地球—大地测量学与测量工程]