一种改进的混合定位算法

Improved hybrid location algorithm

针对目前移动通信网络中无线定位精度偏低的情况,提出一种改进的混合定位算法。主要思想是基于TDOA(到达时间差),考虑NLOS(非视距传播)影响的定位算法。并在求解过程中引入类TOA(到达时间)的计算方法,然后采用最大似然(ML)法估计位置点坐标,最后通过校正,使定位误差达极小值,从而实现精确定位。模拟试验验证了算法的有效性。随着定位精度的增加,紧急救援和交通导航等位置服务的效率将会有很大提高。

An improved location algorithm is put forward for the poor precision of wireless location in mobile communication network.The main idea is based on a location algorithm of time difference of arrival(TDOA)and considering the influence of non-line-of-sight(NLOS).During the process we introduce a location algorithm of time of arrival(TOA),then estimate coordinates by using maximum-likelihood(ML)estimation and obtain the amending value.So,errors of location is minimal.This location algorithm is proved effective through simulating examination.With the improvement of precision,the effective of location service in SOS and navigation of traffic, will be increased greatly