基于Bayes准则的高灵敏度GPS信号跟踪  

High Sensitivity GPS Signal Tracking Using a Bayesian Approach

作　　者：田宇[1] 刘亚欢[1] 杨根庆[1] 

机构地区：[1]中科院微小卫星联合重点实验室,上海200050

出　　处：《宇航学报》2009年第4期1472-1476,共5页Journal of Astronautics

基　　金：国家863计划(2006AA12Z301)

摘　　要：在室内GPS信号强度下实现GPS信号的准确跟踪,是室内GPS能够广泛应用所必须解决的关键技术之一。结合GPS信号格式的特点,根据贝叶斯参数估计的相关理论,提出了一种高灵敏度GPS信号跟踪方案。根据仿真,其跟踪载噪比门限可达12.5dB/Hz,达到目前领先的商用高灵敏度接收机水平。Tracking GPS signal under in-door power level is one of the key technologies in the GPS in-door application. Referring to the format of GPS signal, a Bayesian high-sensitivity tracking approach is developed. The simulation result shows the tracking threshold can be down to 12.5dB/Hz, which is the sensitivity threshold of world leading commercial high-sensitivity GPS receiver.

关 键 词：GPS 高灵敏度 贝叶斯 参数估计 

分 类 号：P228.4[天文地球—大地测量学与测量工程]