A New Cramer-Rao Lower Bound for TOA-based Localization

被引：0
|
作者：
Jia, Tao [1 ]
Buehrer, R. Michael [1 ]
机构：
[1] Virginia Tech, MPRG, Wireless Virginia Tech, Blacksburg, VA 24061 USA
来源：
2008 IEEE MILITARY COMMUNICATIONS CONFERENCE: MILCOM 2008, VOLS 1-7 | 2008年
关键词：
Cramer-Rao lower bound (CRLB); localization; time-of-arrival (TOA); least-squares (LS);
D O I：
暂无
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
In this paper, we derive the Cramer-Rao lower bound (CRLB) for the 2-dimensional (2D) time-of-arrival (TOA) based localization(1). Unlike previous work on the CRLB, we consider a more practical propagation channel and relate it to inter-node range estimate through a distance-dependent variance model. We demonstrate that this will impact the derivation of the Fisher information matrix (FIM), eventually leading to a CRLB different from the existing derivations. This new theoretical framework provides us with additional insights on the immediate impact of the geometric configuration of anchor nodes on the localization accuracy.
引用
收藏
页码：1507 / 1511
页数：5
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