Optimal power allocation under QoS constraints in cognitive radio systems

Vassaki, S; Poulakis, M; Panagopoulos, AD; Constantinou, P

dc.contributor.author	Vassaki, S	en
dc.contributor.author	Poulakis, M	en
dc.contributor.author	Panagopoulos, AD	en
dc.contributor.author	Constantinou, P	en
dc.date.accessioned	2014-03-01T02:53:24Z
dc.date.available	2014-03-01T02:53:24Z
dc.date.issued	2011	en
dc.identifier.issn	21540217	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/36295
dc.subject.other	Cognitive radio	en
dc.subject.other	Cognitive radio technologies	en
dc.subject.other	Effective capacity	en
dc.subject.other	Fading environment	en
dc.subject.other	Optimal allocation	en
dc.subject.other	Optimal power allocation	en
dc.subject.other	Power allocations	en
dc.subject.other	QoS constraints	en
dc.subject.other	Radio resources	en
dc.subject.other	Spectrum usage	en
dc.subject.other	Global system for mobile communications	en
dc.subject.other	Optimization	en
dc.subject.other	Quality of service	en
dc.subject.other	Radio systems	en
dc.title	Optimal power allocation under QoS constraints in cognitive radio systems	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1109/ISWCS.2011.6125418	en
heal.identifier.secondary	http://dx.doi.org/10.1109/ISWCS.2011.6125418	en
heal.identifier.secondary	6125418	en
heal.publicationDate	2011	en
heal.abstract	Cognitive radio technology aims at the efficient utilization of the limited radio resources and the improvement of flexibility of spectrum usage in wireless networks. The main idea of this technology is the development of intelligent networks where the unlicensed secondary users may coexist with the licensed primary users, always limited by the obligation not to affect their communication. In this paper, we consider a spectrum underlay cognitive radio system operating in fading environment. Guaranteeing that the average interference limit constraint to primary users is satisfied, we propose a quality of service (QoS)-driven power allocation scheme, with a view to maximizing the effective capacity of the secondary users. The proposed scheme takes into consideration the interference of primary user to the secondary user, in order to accomplish the optimal allocation more realistically. Finally, the proposed allocation scheme has been evaluated through numerical simulations that confirm the presented theoretical analysis. © 2011 IEEE.	en
heal.journalName	Proceedings of the International Symposium on Wireless Communication Systems	en
dc.identifier.doi	10.1109/ISWCS.2011.6125418	en
dc.identifier.spage	552	en
dc.identifier.epage	556	en