NDLI: AOA Assisted NLOS Error Mitigation for TOA-Based Indoor Positioning Systems

Content Provider	IEEE Xplore Digital Library
Author	Akgul, Ferit Ozan Pahlavan, Kaveh
Copyright Year	2007
Description	Author affiliation: Center for Wireless Information Network Studies, Worcester Polytechnic Institute, Worcester, MA, 01609, USA. kaveh@wpi.edu (Pahlavan, Kaveh) \|\| Center for Wireless Information Network Studies, Worcester Polytechnic Institute, Worcester, MA, 01609, USA. ferit@wpi.edu (Akgul, Ferit Ozan)
Abstract	One of the major challenges for TOA-based accurate indoor positioning systems is the blockage of the LOS path, or equivalently direct path (DP), due to obstructions. Since accurate ranging of these systems depend on the detection of the DP between the transmitter and receiver, significant errors will be introduced into the ranging measurements once the DP cannot be detected. This condition is hence called the undetected direct path (UDP) condition. Owing to the fact that indoor wireless channels exhibit rich multipath propagation, the multipath components other than the DP may be utilized in mitigating errors occurring in UDP areas. In this paper, we introduce a method based on both TOA and AOA information from other multipath components to substantially mitigate the ranging error. We present our results as a comparison with commonly used methods for TOA-based ranging and we show that our proposed technique outperforms these traditional methods.
Starting Page	1
Ending Page	5
File Size	3307561
Page Count	5
File Format	PDF
ISBN	9781424415120
DOI	10.1109/MILCOM.2007.4454868
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-10-29
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Health and safety Transmitters Bandwidth Wireless communication Propagation delay Fading Multipath channels Medical services Equations Supply chain management
Content Type	Text
Resource Type	Article

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