基于载波相位差分的北斗／GPS双模定位系统研究

摘要

Based on carrier phase difference technology ,a Compass/GPS dual-mode positioning system has been researched .A complete algorithm from processing source data to the final result is presented .The mechanism of satellite system has been analyzed .A signal acquisition system based on Compass/GPS data fusion is developed .A method that can detect cycle slip has been proposed ,w hich uses increased distance between star and station in different epochs as the reference value ,and then the standard used to determine cycle slips has been given .The determination of the ambiguity is studied ,and a fast search method named LAMBDA for ambiguity is presented .Observation data from Shanghai Sinan is computed to verify the accuracy ,validity and reliability of the system .%基于载波相位差分技术的北斗／GPS双模定位系统，提出能够精确定位用户位置的完整相对定位算法。文中详细分析卫星导航的定位监测机理，开发北斗／GPS数据融合的双模式信号采集系统。利用星站在历元间的距离增量为参考值来检测周跳，给出判断周跳的标准。对整周模糊度确定的问题进行研究，给出利用LAMBDA法来快速搜索整周模糊度的算法，编写监测点三维位置的定位监测程序。基于上海司南接收机北斗／G PS相对定位实验得到的数据，验证给出双模导航系统的精确性、可用性和可靠性。