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Achieving Centimeter Accuracy Indoor Localization on WiFi Platforms: A Frequency Hopping Approach

Abstract: 

Indoor positioning systems are attracting more and more attention from the academia and industry recently. Among them, approaches based on WiFi techniques are more favorable since they are built upon the WiFi infrastructures
available in most indoor spaces. However, due to the bandwidth limit in mainstream WiFi systems, the indoor positioning system leveraging WiFi techniques can hardly achieve centimeter localization accuracy under
strong non-line-of-sight conditions, which is common for indoor spaces. In this paper, we present a WiFi-based indoor positioning system that achieves centimeter accuracy in non-line-of-sight scenarios by exploiting the frequency diversity via frequency hopping. During the offline phase, the system collects channel state information from multiple channels at locations-of-interest. Then, the channel state information are post-processed to combat the synchronization errors and interference. The channel state information from multiple channels are then combined into location fingerprints via bandwidth concatenation and in a database. During the online phase, channel state information from an unknown location are formulated into the location fingerprint and is compared against the fingerprints in the database using the time-reversal resonating strength. Finally, the location is determined by the calculated time-reversal resonating strengths. Extensive experiment results demonstrate a perfect centimeter accuracy in an office environment in non-line-of-sight scenarios with only one pair of single-antenna WiFi devices.

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Paper Details

Authors:
Chen Chen, Yan Chen, Yi Han, Hung-Quoc Lai, Feng Zhang, K. J. Ray Liu
Submitted On:
26 July 2016 - 12:41pm
Short Link:
Type:
Research Manuscript
Document Year:
2016
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Document Files

localization_frequency_hopping.pdf

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[1] Chen Chen, Yan Chen, Yi Han, Hung-Quoc Lai, Feng Zhang, K. J. Ray Liu, "Achieving Centimeter Accuracy Indoor Localization on WiFi Platforms: A Frequency Hopping Approach", IEEE SigPort, 2016. [Online]. Available: http://sigport.org/1119. Accessed: Jun. 23, 2017.
@article{1119-16,
url = {http://sigport.org/1119},
author = {Chen Chen; Yan Chen; Yi Han; Hung-Quoc Lai; Feng Zhang; K. J. Ray Liu },
publisher = {IEEE SigPort},
title = {Achieving Centimeter Accuracy Indoor Localization on WiFi Platforms: A Frequency Hopping Approach},
year = {2016} }
TY - EJOUR
T1 - Achieving Centimeter Accuracy Indoor Localization on WiFi Platforms: A Frequency Hopping Approach
AU - Chen Chen; Yan Chen; Yi Han; Hung-Quoc Lai; Feng Zhang; K. J. Ray Liu
PY - 2016
PB - IEEE SigPort
UR - http://sigport.org/1119
ER -
Chen Chen, Yan Chen, Yi Han, Hung-Quoc Lai, Feng Zhang, K. J. Ray Liu. (2016). Achieving Centimeter Accuracy Indoor Localization on WiFi Platforms: A Frequency Hopping Approach. IEEE SigPort. http://sigport.org/1119
Chen Chen, Yan Chen, Yi Han, Hung-Quoc Lai, Feng Zhang, K. J. Ray Liu, 2016. Achieving Centimeter Accuracy Indoor Localization on WiFi Platforms: A Frequency Hopping Approach. Available at: http://sigport.org/1119.
Chen Chen, Yan Chen, Yi Han, Hung-Quoc Lai, Feng Zhang, K. J. Ray Liu. (2016). "Achieving Centimeter Accuracy Indoor Localization on WiFi Platforms: A Frequency Hopping Approach." Web.
1. Chen Chen, Yan Chen, Yi Han, Hung-Quoc Lai, Feng Zhang, K. J. Ray Liu. Achieving Centimeter Accuracy Indoor Localization on WiFi Platforms: A Frequency Hopping Approach [Internet]. IEEE SigPort; 2016. Available from : http://sigport.org/1119