一种基于BDS接收机的快速定位技术
首发时间:2015-10-19
摘要:基于我国自主研发的北斗卫星导航系统(BDS),针对BDS接收机上电开机后热启动问题,本文提出了一种快速定位方法。该方法根据BDS系统中静止轨道卫星(GEO)电文速率较高这一特点,可快速获取信号发射时间,并校正接收机本地时间,省去了子帧同步过程;利用有效信息(Flash中存储的星历、概略位置等)快速计算伪距,更新概略位置并进行精确定位。此方法充分利用已知信息及BDS的特点,在不需要RTC辅助的情况下,既保证了定位精度,又有效地缩短了首次定位时间(TTFF)。?
For information in English, please click here
A Fast Positioning Method for BDS Receiver
Abstract:Based on BeiDou Navigation Satellite System(BDS), a fast positioning method for BDS receiver is proposed. According to the high navigation data rate of Geosynchronous Earth Orbit (GEO) satellites in BDS, signal transmission time is accessed rapidly, receiver local time is corrected, and time cost by sub-frame synchronization could be saved. Using the effective information, including ephemeris and approximate position stored in Flash, pseudo-range is calculated, and approximate position is update for precise location. This optimized method takes full advantage of feature in BDS, without RTC assistant, effectively shortens receiver's TTFF.
Keywords: BeiDou Navigation Satellite System fast-positioning time to first fix
基金:
论文图表:
引用
No.4657469106060914****
同行评议
共计0人参与
勘误表
一种基于BDS接收机的快速定位技术
评论
全部评论0/1000