On the accuracy of a cellular location system based on RSS measurements

被引：155
|
作者：
Weiss, AJ [1 ]
机构：
[1] Tel Aviv Univ, Dept Elect Engn Syst, IL-69978 Tel Aviv, Israel
来源：
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY | 2003年 / 52卷 / 06期
关键词：
automatic location identification (ALI); cellular; circular error probable (CEP); concentration ellipse; Cramer-Rao bound; E-911; location accuracy; mobile assisted handoff (MAHO); received signal strength (RSS); threshold effect;
D O I：
10.1109/TVT.2003.819613
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We discuss the performance of a cellular location system based on received signal strength (RSS) measurements. Each mobile station (MS) collects RSS measurements of the downlink control channels transmitted by the surrounding base stations. It is assumed that there is one-to-one mapping between the RSS and the MS location. Hence, these measurements can be used to obtain the MS location. We examine the accuracy of this method by deriving the Cramer-Rao bound, the concentration ellipse, and the circular error probable (CEP) of this method. In addition, we obtain an analytic expression that predicts the point at which accuracy deviates significantly from the bound (the threshold point.) The accuracy of the method does not meet the FCC E911 requirement, but it is an attractive solution for less-demanding location-based services.
引用
收藏
页码：1508 / 1518
页数：11
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