无线局域网中基于信号强度的室内定位.pdf

3
1 1
2 2 2
2 2
2
2 2 2
2
2 2 2
2
2
计算机科学 2007Vol 34 № 6

无线局域网中基于信号强度的室内定位)
张明华张申生曹健
(上海交通大学计算机科学与工程系上海 200240)

摘要确定用户的位置信息有利于向用户提供方便高效的服务,基于接收信号强度的无线局域网室内定位是定位
领域的一个新的研究热点。研究的难点在如何克服随机因素对信号的干扰,使定位方法具有健壮性、适应性。本文基
于 IEEE 802. 11b/ g 协议的无线局域网环境下定位问题的难点,分析了如何评价定位算法的性能问题,介绍目前定位
方法的基本原理、优缺点及其分类,详细综述利用接收信号强度的室内定位算法,最后指出未来定位算法研究的几个
3 方向。
关键词 IEEE 802. 11 ,无线局域网,室内定位,接收信号强度

Received Signal Strength Based Indoor Location in Wireless LANs
ZHAN G Ming Hua ZHAN G Shen Sheng CAO Jian
(Department puter Science & Engineering , Shanghai Jiao Tong University , Shanghai 200240)

Abstract Locating user’s physical position is crucial of providing convenient and efficient services for the user. Re
ceived signal strength based indoor location in WLAN is a hot research topic in the field of location estimation. The dif
ficulties are how to mitigate disturbance of random factors to signals , and make location estimation methods more ro
bust and adaptable. After analyzing the difficulties of location estimation problem in IEEE 802. 11 b/ g WLAN , how to
evaluate the performance of location estimation algorithms , current principles of location methods , their advantages and
disadvantages and classifications are introduced. Then received signal strength based indoor location algorithms are sur
veyed in detail. Future research directions