针对TDOA的定位技术,在城市小区基站数目少且无法定位的情况进行了研究,提出一种定位方法。该方法结合已有的蜂窝网络的增强定位机制,设置建立了切换定位方法的程式,并利用射线跟踪技术建立指纹数据库,运用权值匹配算法,结合定位划分的区域进而给予用户定位服务的位置数据。仿真结果表明,射线跟踪可获取电波数据建立指纹数据库,定位方法可行,合理规划区域范围的大小,能够减少终端运行时间,提高定位服务的质量。
A Location method which is combined with the Existing Reinforcing mechanisms using ray tracing,is proposed,when the TDOA technology couldn't access location in less base station.This method sets the switch program and builds the fingerprint database with ray tracing,then by using the weight matching algorithm and regional areas give the location services to the user.The simulation results shows that the method is feasible and the accurate radio location data is obtained higher by ray tracing;the rational planning of regional size can reduce the end-run time and improve location service quality.