摘要
伪卫星定位技术可以补偿GPS系统本身一些先天不足,然而GPS和伪卫星组合进行定位又带来了新的误差源,伪卫星多路径效应就是误差源之一。针对多路径的产生原理及特点,在经典最小二乘理论的基础上,推求稳健最小二乘估计的权函数,并结合实际观测数据验证了稳健最小二乘法消除多路径误差的有效性。
GPS augmentation with pseudolites positioning can compensate some shortages of only GPS positioning, such as the limitations of GPS satellite geometry, but integration of GPS and pseudolites measurements introduces some new errors. Multipath bias of pseudolite positioning are presented. According to the mechanism and features of multipath effect, the weight function of robust least square estimation is derived, based on classical least square estimation theory. The new weight function is employed to mitigate pseudolite multipath bias of actual observation data. The result shows that the new weight function is a valid for the mitigation of pseudolite multipath bias.
出处
《全球定位系统》
2006年第6期15-19,共5页
Gnss World of China
关键词
伪卫星
GPS
多路径
稳健最小二乘法
Pseudolite
GPS
multipath bias
robust least square estimation
