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Iterative Frequency-Domain Packet Combining Techniques for UWB Systems with Strong Interference Levels

Silva, M. ; Dinis, R. ; Montezuma, P. M.

Wireless Personal Communications Vol. 70, Nº 1, pp. 501 - 517, May, 2013.

ISSN (print): 1572-834X
ISSN (online): 0929-6212

Journal Impact Factor: 0,653 (in 2014)

Digital Object Identifier: 10.1007/s11277-012-0704-5

Abstract
UWB (Ultra Wideband) systems tend to suffer strong interference from signals that occupy a significant part of the transmission band. This is an important constraint, especially when the channel remains fixed for a long period of time. In order to overcome this limitation, this paper considers UWB systems employing SC-FDE (Single-Carrier with Frequency-Domain Equalization) techniques. We propose the corresponding receiver, which also allows the soft packet combining associated to different ARQ (Automatic Repeat ReQuest) transmission attempts, as a measure to improve the performance through the exploitation of diversity. Our techniques are able to cope with strong interference levels as well as deep fading, even for fixed channels.