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Open AccessArticle

Multiple Simultaneous Ranging in IR-UWB Networks

1
National Science and Technology Development Agency, Phahonyothin Road, Pathumthani 12120, Thailand
2
National Electronics and Computer Technology Center, Phahonyothin Road, Pathumthani 12120, Thailand
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(24), 5415; https://doi.org/10.3390/s19245415
Received: 20 November 2019 / Revised: 29 November 2019 / Accepted: 3 December 2019 / Published: 9 December 2019
(This article belongs to the Special Issue Sensors Localization in Indoor Wireless Networks)
Growth in the applications of wireless devices and the need for seamless solutions to location-based services has motivated extensive research efforts to address wireless indoor localization networks. Existing works provide range-based localization using ultra-wideband technology, focusing on reducing the inaccuracy in range estimation due to clock offsets between different devices. This is generally achieved via signal message exchange between devices, which can lead to network congestion when the number of users is large. To address the problem of range estimation with limited signal messages, this paper proposes multiple simultaneous ranging methods based on a property of time difference of reception of two packets transmitted from different sources in impulse-radio ultra-wideband (IR-UWB) networks. The proposed method maintains similar robustness to the clock offsets while significantly reducing the air time occupancy when compared with the best existing ranging methods. Experimental evaluation of ranging in a line-of-sight environment shows that the proposed method enables accurate ranging with minimal air time occupancy. View Full-Text
Keywords: ranging; time-of-flight; clock offset; air time occupancy; ultra-wideband; two-way ranging ranging; time-of-flight; clock offset; air time occupancy; ultra-wideband; two-way ranging
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Shah, S.; Demeechai, T. Multiple Simultaneous Ranging in IR-UWB Networks. Sensors 2019, 19, 5415.

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