GPS接收机双模热启动算法  

A new double mode scheme for GPS receiver hot-start

作　　者：蔡佳楠[1] 孙龙[1] 

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5期39-44,共6页China lntegrated Circuit

摘　　要：为了提高GPS接收机热启动首次定位的成功率和定位精度,本文提出了一种双模热启动算法,依据时间误差的不同选取不同的热启动模式。该算法在时间误差较小时具有较小的计算量和较高的定位精度,在时间误差较大时依旧能够保证较高的定位精度,从而既保证了热启动的定位精度又提高了首次定位的成功率。仿真实验结果表明,该方法可以在时间误差不断增大的情况下成功热启动,并且保持较高的定位精度,同时该方法可以进一步推广到重捕获和弱信号情况下的定位解算。In order to improve the successful rate of GPS hot-start and accuracy of positioning in the time to first fix, this paper proposes a double scheme hot-start algorithm. According to the error of the time, different hot-start mode can be select. When the error of the time is little, four states mode algorithm has smaller calculation amount and high- er precision. shows that the same time this positioning. On the contrary, five states mode algorithm can still keep high accuracy. The result of the simulation algorithm can successfully and accurately get position under different error of the time condition. At the algorithm can be further extended to other filed, for instance weak signal positioning and re-acquire

关 键 词：GPS接收机 热启动 快速定位 模式选择 

分 类 号：P228.4[天文地球—大地测量学与测量工程]