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Transceiver-power Control for 802.15.4a UWB-IR Ranging in the Presence of Multipath Propagation

Authors:
Tingcong Ye
Brendan O’Flynn
Michael Walsh
Cian O’Mathuna

Keywords: 802.15.4a UWB-IR, Transceiver-power Control, Ranging, Multipath Propagation

Abstract:
Sensor networks can benefit from locationawareness, since it allows information gathered by sensors to be tied to their physical locations. The emerging IEEE 802.15.4a Ultra Wideband Impulse Radio (UWB-IR) transmission is a promising technology for ranging and location-aware sensor networks, due to its fine time resolution and power efficiency. However, the presence of multipath propagation presents a significant challenge in terms of ranging, as they can result in biased distance estimates. In this paper, we present multipath effects mitigation methods using bilateral transceiver-power control algorithms, which are capable of: (i) optimizing the signal to noise ratio (SNR) of leading path signal and maintaining the connectivity; and (ii) cooperating with a practical symmetric double-sided two-way ranging protocol. Relevant aspects of power control are discussed using an automatic control framework. We evaluate the resulting performance and compare with existing non-power control techniques. Experimental results show that the proposed multipath effects mitigation approach is more robust against the non-power control based ranging errors.

Pages: 38 to 43

Copyright: Copyright (c) IARIA, 2013

Publication date: August 25, 2013

Published in: conference

ISSN: 2308-4405

ISBN: 978-1-61208-296-7

Location: Barcelona, Spain

Dates: from August 25, 2013 to August 31, 2013