多天线GPS载波相位信息动态提取算法

A Dynamic Extraction Algorithm for Multi-antenna GPS Carrier Phase Information

提出了一种不依赖伪距信息的多天线GPS载波相位动态提取算法。利用天线切换法得到GPS载波相位整周期模糊度的初值,通过比较模糊度函数的大小得到载波相位信息的最终估计值。理论分析表明,文中算法复杂度较低,提取载波相位用时较短,并且不依赖于GPS系统的伪距信息;计算机仿真表明,文中算法无论是解算用时,还是定位精度,都取得了比最小二乘降相关法更好的性能;而且,文中算法在GPS/INS联合测姿系统中,也有很好的应用。

This paper proposed a dynamic extraction algorithm for multi-antenna GPS carrier phase information, which did not depend on system pseudo range information. We used antenna switch method to get the initial value of integer cycle ambiguity of the GPS carrier phase, and utilized this information to compare the ambiguous function Size, and got the final estimation value of GPS carrier phase. The proposed algorithm has low complexity, and it can get the correct carrier phase in a short period of time. The computer simulation results show that, as well as for phase solution time, the proposed algorithm can achieve better performance in position accuracy than least square descend relation algorithm; and it can get good performance in GPS/INS integrated attitude determination system.