GPS软件接收机关键技术研究及实现  

Key technology study and implementation of GPS software receiver

作　　者：李晨[1] 王巍[2] 王珊珊[1] 

机构地区：[1]西安工业大学北方信息工程学院,陕西西安710032 [2]航天恒星空间技术应用有限公司,陕西西安710077

出　　处：《电子设计工程》2012年第11期47-50,共4页Electronic Design Engineering

摘　　要：研究了GPS软件接收机的关键技术和具体实现。设计并实现了一种基于FFT的码相位并行的快速信号捕获方案;介绍了码跟踪环与载波跟踪环的算法流程并详细推导了伪距及精密伪距的计算过程,在建立载体运动模型的基础上运用卡尔曼滤波对定位结果滤波处理,提高了定位精度,减小了定位方差。通过实验,验证了文中软件接收机算法的可行性,接收机定位精度较高,定位均方差较小。Key technology and implementation of software receiver is studied in this paper. Firstly, code-parallel acquisition algorithm based on FFT is ameliorated and a fast signal acquisition scheme is designed. Secondly, algorithm block diagram of code tracking loop and carrier tracking loop is introduced. At last, based on the dynamic model of cartier moving, positioning result is processed by Caiman filter to improve the positioning precision and decrease variance. Experiment results show that the proposed software receiver algorithm is functional and with high positioning precision and the lower Square poor.

关 键 词：GPS 捕获 跟踪 伪距 卡尔曼滤波 

分 类 号：TN927[电子电信—通信与信息系统]