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Reconfigurable Tactical Impulse Radio UWB for Communication and Indoor Localization

Authors:
Thomas Beluch
Aubin Lecointre
Daniela Dragomirescu
Robert Plana

Keywords: UWB-IR, wireless Sensor Network, localization, indoor

Abstract:
The paper is focused on the design of a new reconfigurable tactical UWB impulse radio enabling indoor communication and localization for military application. The proposed system contains both a physical and a MAC (Medium Access Control) layer. It proposes to answer military needs for information sharing and for indoor localization of infantry. The physical layer is based on IR-UWB (Impulse Radio Ultra WideBand). Its goal is to ensure communication and distance evaluation between the transmitter and the receiver. IR-UWB is necessary for constraints such as low power consumption,reconfigurability, through the wall propagation, fine resolution localization, low probability of detection and interception. These advantages come from the use of a very large bandwidth with very short pulses. The digital baseband implementation of a reconfigurable IR-UWB transceiver is based on a coherent Rake receiver and on a parallel search acquisition. Its synchronization accuracy is of 0.33 ns. This enables distance evaluation with a precision of 10 cm. The MAC layer deals with the multi user access and the positioning. TDMA is used for sharing the channel between users. WiDeCS, a master-slave TOA (Time of Arrival)cross layer mechanism is implemented for time synchronization. This algorithm can also determine the Time of Flight of theIR-UWB signal due to timestamps at the physical layer. This algorithm followed by triangulation and-or angle of arrival techniques leads to 3D positioning.

Pages: 235 to 240

Copyright: Copyright (c) IARIA, 2011

Publication date: January 23, 2011

Published in: conference

ISSN: 2308-4413

ISBN: 978-1-61208-113-7

Location: St. Maarten, The Netherlands Antilles

Dates: from January 23, 2011 to January 28, 2011