Durowju, Olasunkanmi, Arshad, Kamran and Moessner, Klaus (2011) Cognitive time variant power control in slow fading mobile channels. In: 2011 IEEE 73rd Vehicular Technology Conference Proceedings. Institute of Electrical and Electronics Engineers, Inc., Piscataway, NJ, USA. ISBN 9781424483327 ISSN 1550-2252 (doi:10.1109/VETECS.2011.5956556)

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Abstract

Increased spectrum efficiency has been demonstrated with the use of cognitive radios, however with increased likelihood of interference to the incumbents of spectrum. Several studies solved the interference problem from the transmitter power control perspective, so as to curtail excessive cognitive interference powers; however, neglecting the effect of secondary terminal mobility. We show by simulation that such assumption of terminal immobility in the power control algorithm would fail in time variant cases resulting in increased levels of interference to the Incumbents as well as serious degradation in QoS within the cognitive radio network. We model the link gain evolution process as a distance dependent shadow fading process and scale up the target signal to interference ratio to cope with time variability. This paper therefore, proposes a mobility driven power control algorithm for cognitive radios based on sensing information, which ensures that the interference limit at the Incumbents is unperturbed at all times while concurrently maintaining the QoS within the cognitive radio network.

Item Type:	Conference Proceedings
Title of Proceedings:	2011 IEEE 73rd Vehicular Technology Conference Proceedings
Additional Information:	[1] This paper was first presented at the 2011 IEEE 73rd Vehicular Technology Conference (VTC Spring) held from 15-18 May 2011 in Budapest, Hungary.
Uncontrolled Keywords:	fading channels, mobile radio, radio networks, radio transmitters, radio frequency interference, cognitive interference power, cognitive radio network, cognitive time variant power control, distance dependent shadow fading process, fading mobile channel, interference ratio, mobility driven power control algorithm, spectrum efficiency, terminal immobility, time variant case, transmitter power control perspective, cognitive radio, fading, interference, power control, sensors, signal to noise ratio, quality of service
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering
Pre-2014 Departments:	School of Engineering School of Engineering > Mobile & Wireless Communications Research Laboratory
Related URLs:	Publisher Publisher Organisation
Last Modified:	14 Oct 2016 09:27
URI:	http://gala.gre.ac.uk/id/eprint/11289

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