摘要
在载体旋转情况下,接收机接收到的导航卫星信号会附加较大的多普勒频移,导致接收机跟踪性能下降,甚至失锁。针对这一问题,提出一种使接收机能正常跟踪载体旋转情况下导航卫星的设计方案。该设计在传统环路基础上加入辅助通道,实现载体旋转转速的实时估计以辅助环路跟踪。经过仿真验证,改进之后的环路能够有效降低载体旋转造成的不良影响,达到正常信号的跟踪效果。
In the case of carrier rotation, the navigation satellite signal received by receiver will have additional lager Doppler frequency shift, resulting in a decline in the receiver tracking performance and even failure. In order to solve this problem, a scheme is proposed to help the receiver track navigation satellite normally with rotating carrier. Based on traditional loop, the adding of auxiliary channel realizes real-time estimation of rotating speed to assist loop tracking. Simulation proves that the improved loop can effectively reduce the adverse effects caused by carrier rotation and achieve normal signal tracking.
出处
《中国民航大学学报》
CAS
2016年第2期15-18,共4页
Journal of Civil Aviation University of China
基金
国家自然科学基金项目(61271404
61471363)
中央高校基本科研业务费专项(3122014D008)
关键词
载体旋转
导航卫星信号
跟踪环路
多普勒频移
carrier rotation
navigation satellite signal
tracking loop
doppler frequency shift
