多星座联合导航定位算法及数值方法

Positioning Algorithm of the Multiple Constellations Combined Navigation and Its Numerical Method

针对北斗二代和GPS双星座联合解算时存在时间系统不同步、运算量大的问题.文中将时间系统偏差作为估计量,推导并建立了卡尔曼滤波状态空间模型和量测模型,给出高效率的数值算法.试验表明,该模型和算法具有保持在亚米级别的精度,且稳定性高、计算量小.

The research aims to solve the problems of un-synchronization of the clock system and the large wnount of calculation in the combined calculation of the multiple constedations of the BeiDou-II and GPS. With the clock system deviation as the state estimation volume, the Extended Kalman Filter; s state-space model and measurement model equations were derived and established, and an efficient numerical algorithm was given. Simulation tests show that the model and algorithm have higher accuracy and stability and less amount of calculation.