NDLI: NLOS aware TOF positioning in WLAN

Content Provider	IEEE Xplore Digital Library
Author	Min Peng Zhou, Q.F. Xusheng Cheng
Copyright Year	2015
Description	Author affiliation: Sch. of Comput. & Inf., Hefei Univ. of Technol., Hefei, China (Min Peng; Zhou, Q.F.; Xusheng Cheng)
Abstract	Time-based Wireless Local Area Network (WLAN) positioning, particularly in indoor environments, faces the challenge that Non-Line-of-Sight (NLOS) signals enlarge the measured value of Time-of-Flight (TOF) and lead to positioning errors. It is feasible to improve the performance of time-based positioning by recognizing and eliminating NLOS signals. Unfortunately, existing NLOS recognition approaches require complex devices and algorithms and aren't suitable for WLAN positioning. In this paper, we propose an efficient NLOS recognition algorithm based on the comparison between TOF and RSSI. The NLOS probability of a certain measured TOF could be evaluated according to the relationship between the measured TOF and Received Signal Strength Indicator (RSSI). Then the collected TOF values which correspond to NLOS signal with high probability are discarded so that the positions of clients could be estimated more accurately. In the simulation, we evaluate the NLOS aware TOF positioning algorithm in indoor environments. The results show that the proposed algorithm improved the positioning accuracy without any additional equipments or calibrations.
Starting Page	1
Ending Page	5
File Size	747137
Page Count	5
File Format	PDF
e-ISBN	9781467376877
DOI	10.1109/WCSP.2015.7341334
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-10-15
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wireless communication Wireless LAN RSSI Power measurement WLAN Positioning Estimation NLOS Position measurement Attenuation Calibration Time-of-Flight
Content Type	Text
Resource Type	Article

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