一种GPS高精度测速方法

摘要

The development of GPS requires high accuracy of velocity-measuring of GPS receiver.The Doppler used in normal velocity-measuring method is average Doppler,which cannot meet the requirement of high-accuracy velocity measurement.To solve this problem,an improved algorithm is proposed,which can get high-accuracy results by estimating Doppler and the receiver state at the time of observation.Testing results for the algorithm depending on the receiver and the simulator show that it can improve the accuracy of velocity measurement,which proves the validity and feasibility of the method of designing.%GPS技术的发展对GPS接收机的测速精度提出了更高要求,普通测速算法中采用的多普勒为平均多普勒,已不能满足观测时刻高精度测速的需求.针对这一问题,提出了一种改进的GPS高精度测速方法,通过推导观测时刻的多普勒和对接收机运动状态的估计来达到高精度测速结果的输出.将改进算法移植到接收机中对接模拟器进行速度精度测试,结果表明该算法相较于普通测速算法能够提高测速精度,证明了提出算法的有效性和可实现性.