一种GPS接收机抗短时遮挡的技术

在GPS车载应用中,城市中大楼和高架的短时遮挡很频繁,会导致被遮挡的卫星不停的在捕获和跟踪状态之间切换,这严重影响了定位的连续性.文章提出巡航跟踪算法,可以有效抗短时遮挡.通过理论分析与仿真,该算法可以有效地检测出信号是否被遮挡,并且,在检测出信号恢复之后,能够迅速进入跟踪状态.这可以提高GPS接收机的定位连续性和完好性,并且可以降低接收机的功耗.

A Technology for Resisting Short-time Occlusion by GPS Receiver

In the city, the high building and viaduct would block GPS satellite frequently for short time when GPS is used in vehicle, thus to cause the blocked GPS satellite to switch state between acquisition and tracking continuously and seriously decrease the continuity of positioning. This paper brings out a cruising-tracking algorithm, which can resist the short time occlusion effectively. In the light of theoretical analysis and simulation, this algorithm can detect whether the satellite is blocked or not effec...