| Vol. 4, No. 1, May 2007 - Art. 8 |
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| Managing Impulsive Interference in Impulse Radio UWB Networks |
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by
Manuel Flury, Ruben Merz, and Jean-Yves Le Boudec
EPFL, School of Computer and Communication Sciences
Copyright
Copyright © Ecole Polytechnique Fédérale
de Lausanne, 2007
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| | | Abstract
Wireless sensor networks are ideally built on low-cost, low-complexity
nodes that have a low power consumption to guarantee a long network
lifetime. These are all properties that can potentially be achieved
with impulse radio ultra-wide band (IR-UWB). In addition, IR-UWB
has a fine timing resolution resulting in accurate ranging and localization
possible. For all these reasons, IR-UWB is an extremely interesting
physical layer technology for wireless sensor networks. In this
article, we consider the management of impulsive interference in
IR-UWB networks. Impulsive interference is due to uncoordinated
concurrent transmissions. It occurs, for instance, when several
independent piconets operate in close vicinity and is also present
in some MAC layer proposals that allow concurrent transmissions.
If not properly addressed, impulsive interference can severely affect
the throughput and energy consumption of an IR-UWB network; as such,
it already needs to be taken into account in the design phase. First,
we show that impulsive interference is a serious concern for IR-UWB
networks. Second, we present techniques at the physical layer and
at the link layer to cope with and combat such interference efficiently.
Finally, we present DCC-MAC as an example of an interference-aware
design. |
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