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Journal of Electrical and Computer Engineering
Volume 2012 (2012), Article ID 348982, 8 pages
http://dx.doi.org/10.1155/2012/348982
Research Article

Analysis and Mitigation of the Narrowband Interference Impact on IR-UWB Communication Systems

1Department of Electronic Warfare, Military Technical College, Tenth District, Nasr City, Cairo 11528, Egypt
2Department of Systems and Computer Engineering, Carleton University, 1125 Colonel By Drive, Ottawa, ON, Canada K1S 5B6

Received 22 September 2011; Revised 11 December 2011; Accepted 13 December 2011

Academic Editor: Yo-Sheng Lin

Copyright © 2012 Ehab M. Shaheen and Mohamed El-Tanany. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The impact of narrowband interference signals on impulse radio ultrawideband (UWB) communication systems has been investigated. A closed form expression for the bit error rate performance of UWB communication system in a Log-normal flat fading channel under such impact is evaluated. The actual UWB channel model is known as a multipath fading channel; however flat fading channel model can be considered with some of the UWB wireless applications such as UWB wireless sensor networks which are characterized by size and energy constraints. Thus, a simple and low-cost one-finger Rake receiver can be used with such wireless systems. It was proven that UWB systems unavoidably suffer from the interference caused by the coexisting systems due to the restraint on their transmission power levels. To this end, we propose an interference canceller scheme which is capable of suppressing the impact of such interference and enhancing the performance of UWB communication systems. The interference canceller scheme performance is also investigated in various scenarios of operation such as the presence of multiple narrowband interference signals, symbol timing error, and a comparison with a notch filter-based case.