摘要
利用全球定位系统(GPS)能在观测到3颗GPS卫星时实现2D定位,实现3D定位则需要至少观测到4颗卫星。在卫星观测数目为2或1的不完备条件下,仅利用GPS已无法完成正常定位。文章提出了结合数字地图的不完备条件下GPS定位算法,实验证明,应用该算法在仅能观测到2颗GPS卫星时能完成满足一定精度要求的定位,在仅能观测到1颗GPS卫星时能给出有价值的信息,并且能够简化地图匹配的工作,从而可以作为车载定位系统的有力补充。
Utilizing Global Positioning System(GPS),2D Positioning can be achieved when there are three GPS Satellites observed,and 3D Positioning will be realized while at least four GPS satellites available,In the incomplete condition that only two or one satellites are tracked,the GPS would fail.This paper presents a GPS positioning algorithm in incomplete condition combined with the digital map,which,as experiments proved,can be efficient or/and give valuable results when the number of GPS satellites available is two or one,and also can reduce the complexity of Map Matching(MM).The algorithm can play a synergistic role in the land vehicle positioning system.
出处
《计算机工程与应用》
CSCD
北大核心
2006年第24期198-200,228,共4页
Computer Engineering and Applications
基金
上海市重点攻关项目(编号:035115003)