基于相对伪距的热启动算法  

GPS receiver hot-start algorithm based on relative pseudorange

作　　者：蔡佳楠[1] 孙龙[1] CAI Jia-nan SUN Long(The 38th Research Institute of China Electronics Technology Group Corporation, Hefei 230088, Chin)

机构地区：[1]中国电子科技集团公司第三十八研究所,安徽合肥230088

出　　处：《中国集成电路》2017年第10期28-31,共4页China lntegrated Circuit

摘　　要：为了提高热启动首次定位的成功率,本文提出了一种基于相对伪距的热启动定位算法,该算法不需要维护良好的本地时间、本地概略位置、RTC时钟等先验信息,只需要有保存完整的星历,即可在短时间内得到接收机的位置和本地时间。该算法降低了热启动功能对先验信息的依赖性,从而提高了热启动的成功率。仿真实验结果表明,该算法可以在先验信息不完备的情况下在较短时间内成功实现热启动,并且首次定位时间较短,具有重要的使用价值。In order to improve the successful rate of GPS hot-start in the time to first fix, this paper proposes a GPS receiver hot-start algorithm based on relative pseudorange. The algorithm does not need to maintain accurate prior in- formation, such as local time, local position, and RTC. The new hot-start algorithm can be started to get the position and local time in short time by complete ephemeris data only. The algorithm reduces the hot-start dependence on pri- or information and improves the successful rate of hot-start. The result of the simulation shows that the algorithm can successfully and accurately get position and local time under limited prior information in a relatively short time. So this algorithm is useful in application.

关 键 词：GPS接收机 热启动 相对伪距 虚构的本地时间 

分 类 号：P228.4[天文地球—大地测量学与测量工程]