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.
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)
