Efficient Indoor Localization via Switched-Beam Antennas

被引:8
|
作者
Zhang, Yonglong [1 ]
Psounis, Konstantinos [1 ]
机构
[1] Univ Southern Calif, Ming Hsieh Dept Elect Engn, Los Angeles, CA 90089 USA
关键词
Antenna measurements; Antenna arrays; Wireless fidelity; Mobile antennas; Switches; Industries; Synchronization; Indoor localization; fingerprinting; switched-beam antennas; HIDDEN MARKOV-MODELS; SENSOR NETWORKS; SMART ANTENNAS; SYSTEM; RADIO; LOCATION; ARRAY;
D O I
10.1109/TMC.2019.2921763
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
Location-based services have become extremely popular. As a result, indoor localization has received a lot of attention from both industry and academia. Despite the plethora of existing approaches, no method can achieve high accuracy without major, expensive changes to existing systems. For example, to achieve good accuracy, fingerprinting methods require many APs within range of a client, time-of-arrival methods require tight synchronization, client hardware changes and line-of-sight, and direction-of-arrival methods require expensive antenna front ends and line-of-sight. In this paper, we take advantage of inexpensive, off-the-shelf switched-beam antennas (SBAs) to increase the diversity of measurements used for fingerprint-based localization. We show using experiments that a single AP equipped with is SBAs may infer equally rich localization information as n APs equipped with n omnidirectional antennas each, as long as the SBAs are properly configured. We then establish via extensive experiments that a single packet reception from a commodity client at a single AP equipped with a handful of SBAs (e.g., eight SBAs costing a couple of dollars more than omni antennas) achieves localization accuracy in the order of half a meter with or without line-of-sight, in any indoor environment, with zero airtime overhead and zero client support.
引用
收藏
页码:2101 / 2115
页数:15
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