蜂窝网移动定位场强法的研究与应用  

Application and research of mobile location technology based on signal strength in cellular network

作　　者：计征宇[1] 皮亦鸣[1] 舒金表[1] 

机构地区：[1]电子科技大学电子工程学院,7014信箱四川成都610054

出　　处：《全球定位系统》2005年第4期18-22,共5页Gnss World of China

摘　　要：从场强的传播模型和定位估计算法出发,实现了在蜂窝网络中移动终端的定位。利用终端大量的实测数据在Okumura Hata模型的基础上建立了相对精确的传播模型。然后从减少场强的非视距影响着手,提出了基于场强概率密度函数和最大似然估计法的定位算法。This paper introduces a method to locate the position of mobile terminal in cellular network by using signal transmitting model and location algorithm. First, a more precise signal transmitting model is established based on the Okumura Hata model and a lot of measurement data. Then,in order to degrade the disadvantageous influence of non-line-of-sight propagation of radio wave on location perfomance, an improved location algorithm is presented based on the PDF of signal strength and estimation methods based on maximum likelihood ruction.

关 键 词：场强 定位 最大似然估计 蜂窝网 

分 类 号：P225.1[天文地球—大地测量学与测量工程]