一种基于时间反转的无线定位方法  

A Wireless Positioning Method Based on Time-reversal

作　　者：郝明[1] 熊兴中[1] 邱玲[2] 

机构地区：[1]四川理工学院自动化与电子信息学院,四川自贡643000 [2]四川理工学院计算机学院,四川自贡643000

出　　处：《四川理工学院学报（自然科学版）》2012年第6期22-26,共5页Journal of Sichuan University of Science & Engineering(Natural Science Edition)

基　　金：四川省杰出青年基金项目(2011JQ0034);四川理工学院人才引进项目(2010XJKRL014)

摘　　要：针对传统的蜂窝网无线定位方法受非视距传输、信道噪声、多径干扰等因素的影响,定位精度往往会出现较大偏差的情况,提出了一种基于时间反转的无线定位方法。该方法以不同信道冲激响应的相关函数的脉冲宽度作为位置特征参数,测量移动终端到基站之间的距离,实现对移动终端的定位。实验仿真结果证明,在存在非视距传输、信道噪声、多径干扰的情况下,该方法具有较好的定位效果。Due to the impact of factors like none line-of-sight transmission, interchannel noise and muhipath interfer- ence, traditional cellular wireless positioning system is hard to get a higher precision. A novel wireless positioning method is proposed based on the time reversal technology. Taking the pulse width of related function of different channel impulse response as position characteristic parameters, the distance between the mobile terminal and base station is measured and then the mobile terminal is exactly located by this method. Experimental simulation shows that under the condition of none line-of- sight transmission, interchannel noise and muhipath interference, this wireless positioning has good positioning performance.

关 键 词：无线定位 相关函数 冲激响应 时间反转 

分 类 号：TN929.531[电子电信—通信与信息系统]