一种基于RDSS服务的加速导航定位接收机冷启动的方法

摘要

基于 RDSS 业务服务的导航定位接收机的首次定位时间是衡量接收机性能的一个重要指标。接收机冷启动过程中，由于要采用轮询的方式从所有可见卫星中锁定信号，积累星历数据，导致首次定位时间延长。本文提出了一种基于RDSS服务的加速接收机冷启动的方法，该方法能够有效的提高接收机冷启动首次定位的时间，具有一定的推广前景。%The Time to First Fix (TTFF) of a receiver is an important indication of measuring the receiver function. During the cold start of a receiver, the fact that the signals from visible satellites are locked by the way of enquiry and ephemeris data are accumulated would lead to TTFF to be prolonged. The paper presents a method of accelerating a receiver’s cold start time based on the RDSS network. The method is used to improve greatly the TTFF and has a bright prospect of application.