A 3-Tier UWB-Based Indoor Localization System for Ultra-Low-Power Sensor Networks

被引：26
|
作者：
Li, Zheng [1 ]
Dehaene, Wim [1 ]
Gielen, Georges [1 ]
机构：
[1] Katholieke Univ Leuven, Dept Electrotech ESAT MICAS, B-3001 Louvain, Belgium
来源：
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS | 2009年 / 8卷 / 06期
关键词：
UWB; indoor localization; TOA; ultra low power;
D O I：
10.1109/TWC.2009.080602
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 present a 3-tier UWB-based indoor localization system. It consists of a large number of energy-scavenging-based cost-effective transmit-only tags, a small number of battery-powered hubs as relay stations and a few base stations. This hierarchical scheme is driven by the energy available at each node. Localization is based on the arrival time of the UWB pulses at reference nodes. We describe how the coordinates and transmit time of a tag are determined and how the ambiguous solution is eliminated with the proper geometry of 4 reference nodes. We formulate where to place the hubs as an optimization problem. The localization performance of the system is investigated as a function of several parameters such as non-ideal hub placement, hub localization error and TOA error.
引用
收藏
页码：2813 / 2818
页数：6
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