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.
出处
《全球定位系统》
2005年第4期18-22,共5页
Gnss World of China
关键词
场强
定位
最大似然估计
蜂窝网
Signal strength
location
estimation method based on maximum likelihood function
cellular network
