一种粗略辅助条件下的北斗接收机快速定位方法

Quick Positioning Method of Beidou Receiver under Rough Auxiliary Condition

为提升GNSS接收机定位速度,采用网络服务器的信息辅助(A-GNSS)方法,研究了粗略辅助条件下的北斗接收机快速定位问题,从基本伪距观测方程求解位置和时间信息出发,详细分析了粗时辅助对基本伪距方程求解带来的误差以及时间和位置不确定度较大时毫秒模糊问题产生的机理,推导了含粗时误差的伪距方程和毫秒模糊度求解方程,给出了全伪距重构的方法流程及其准确重构条件;实验表明,该算法及流程可以准确可靠的解决北斗接收机的快速定位问题,性能优良,具有极强的工程实用价值。

The main content of this paper is studying the rapid positioning of the beidou satellite receiver in rough auxiliary condition. We analyze the effect of fuzzy time and approximate position for the rapid positioning in detail. The pseudo range equations with fuzzy time and the solution formula with fuzzy measure of millisecond have been deduced. We also provide the reconstitution methods of pseudo range equa- tions and application conditions. This method has been proved to be effective and accurate by the experiments. It can be used to keep the bei- dou satellite receiver positioning rapidly and has the important value of practical project.