卫星导航信号完整性研究  

Research on satellite navigation signal integrity

作　　者：湘江 梁津垚[2] 唐崇毅[2] 钱良[2] 

机构地区：[1]西安电子科技大学通信工程学院,西安710126 [2]上海交通大学电子工程系,上海200240

出　　处：《信息技术》2014年第1期3-6,共4页Information Technology

基　　金：国家自然科学基金项目(61102051)

摘　　要：为了提高导航定位的可用性,在街道、树林和室内等有遮挡的场景实现精确定位,卫星导航的完整性研究日益成为热点。文中提出了一种全新的卫星-基站混合定位方法。该方法考虑非直达波(NLOS)的影响,将散射体作为虚拟信号源,建模分析NLOS导致的定位误差,并基于GDOP分析,选择最优的卫星-基站定位组合,抑制多径误差,改善定位精度因子(DOP)。仿真表明,相比于传统的混合定位,该方法具有更高的定位精度和鲁棒性。In order to prove the availability of satellite navigation,especially to provide precise navigation data where trees,buildings interfering signals,the research on satellite navigation integrity is increasingly becoming a hot spot.This paper proposes a new satellite/base station hybrid positioning method.NLOS is taken into account,taking scattering things as virtual signal sources.After modeling the position error,also with GDOP value,it can choose the optimal satellite-base-station combination which can suppress multipath error and ameliorate DOP.The simulation results show that this method has higher position accuracy and robustness when compared to the traditional hybrid position method.

关 键 词：基站-卫星定位 几何精度因子 非视距传播 

分 类 号：TN967.1[电子电信—信号与信息处理]