Opportunistic beamforming in OFDMA systems

Zarbouti, DA; Kaklamani, DI; Tsoulos, GV; Athanasiadou, GE

dc.contributor.author	Zarbouti, DA	en
dc.contributor.author	Kaklamani, DI	en
dc.contributor.author	Tsoulos, GV	en
dc.contributor.author	Athanasiadou, GE	en
dc.date.accessioned	2014-03-01T02:46:54Z
dc.date.available	2014-03-01T02:46:54Z
dc.date.issued	2010	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/32930
dc.subject	Blocking Probability	en
dc.subject	Cross Layer	en
dc.subject	Performance Analysis	en
dc.subject	qos provisioning	en
dc.subject	Radio Resource Management	en
dc.subject	Rate Adaptation	en
dc.subject	Resource Allocation	en
dc.subject.other	Comparative performance analysis	en
dc.subject.other	Cross-layer	en
dc.subject.other	OFDMA systems	en
dc.subject.other	Operational scenario	en
dc.subject.other	Opportunistic beamforming	en
dc.subject.other	Power controlled	en
dc.subject.other	Radio resource management	en
dc.subject.other	Rate adaptation	en
dc.subject.other	Simulation result	en
dc.subject.other	System fairness	en
dc.subject.other	Transmit power	en
dc.subject.other	Beamforming	en
dc.subject.other	Blocking probability	en
dc.subject.other	Information science	en
dc.subject.other	Interfaces (computer)	en
dc.subject.other	Optimization	en
dc.subject.other	Quality of service	en
dc.subject.other	Resource allocation	en
dc.subject.other	Throughput	en
dc.subject.other	Frequency division multiple access	en
dc.title	Opportunistic beamforming in OFDMA systems	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1109/PCI.2010.24	en
heal.identifier.secondary	http://dx.doi.org/10.1109/PCI.2010.24	en
heal.identifier.secondary	5600459	en
heal.publicationDate	2010	en
heal.abstract	The opportunistic beamforming (OB) technique in multicellular OFDMA networks is investigated in this paper. For this reason, three cross-layer radio resource management (RRM) algorithms for OFDMA operational scenarios that are based on typical resource allocation targets such as minimization of transmit power, maximization of throughput and interference averaging are considered. The OB concept is combined with the considered RRM algorithms and a comparative performance analysis between the two types of resulted networks (omni and OB) is performed in terms of throughput, blocking probability and fairness. The simulation results suggest that OB is preferred for OFDMA systems with opportunistic rate adaptation rather than power controlled systems which offer QoS provision. According to the presented results, OB provides to OFDMA systems with opportunistic rate adaptation a ∼13% throughput gain and ∼75% gain in terms of blocking probability. In addition, it is shown that the combination of OB with interference averaging RRMalgorithms has a minor bene0cial impact only on the system fairness. © 2010 IEEE.	en
heal.journalName	Proceedings - 14th Panhellenic Conference on Informatics, PCI 2010	en
dc.identifier.doi	10.1109/PCI.2010.24	en
dc.identifier.spage	93	en
dc.identifier.epage	98	en