Performance of OFDMA multicell systems with opportunistic beamforming

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

dc.contributor.author	Zarbouti, DA	en
dc.contributor.author	Tsilimantos, DC	en
dc.contributor.author	Tsoulos, GV	en
dc.contributor.author	Athanasiadou, GE	en
dc.contributor.author	Kaklamani, DI	en
dc.date.accessioned	2014-03-01T02:11:56Z
dc.date.available	2014-03-01T02:11:56Z
dc.date.issued	2012	en
dc.identifier.issn	09296212	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/29974
dc.subject	OFDMA	en
dc.subject	Opportunistic beamforming	en
dc.subject	Power control	en
dc.subject	Radio resource management	en
dc.subject	Rate adaptation	en
dc.subject.other	Carrier basis	en
dc.subject.other	Comparative performance analysis	en
dc.subject.other	Cross-layer	en
dc.subject.other	Large scale simulations	en
dc.subject.other	Multicell system	en
dc.subject.other	Network planning	en
dc.subject.other	OFDMA	en
dc.subject.other	OFDMA resource allocation	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	System fairness	en
dc.subject.other	Transmit power	en
dc.subject.other	Algorithms	en
dc.subject.other	Beamforming	en
dc.subject.other	Blocking probability	en
dc.subject.other	Computer simulation	en
dc.subject.other	Multiuser detection	en
dc.subject.other	Power control	en
dc.subject.other	Quality of service	en
dc.subject.other	Radio communication	en
dc.subject.other	Throughput	en
dc.subject.other	Frequency division multiple access	en
dc.title	Performance of OFDMA multicell systems with opportunistic beamforming	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/s11277-011-0315-6	en
heal.identifier.secondary	http://dx.doi.org/10.1007/s11277-011-0315-6	en
heal.publicationDate	2012	en
heal.abstract	The opportunistic beamforming (OB) technique in multicellular OFDMA networks is investigated in this paper. Three cross-layer radio resource management (RRM) algorithms for OFDMA operational scenarios are considered. These algorithms build upon typical network planning practices for OFDMA systems. The first two implement an OFDMA network with opportunistic rate adaptation while the third one aims at a network which guarantees QoS provision through power control on carrier basis. The RRM algorithms are based on typical OFDMA resource allocation targets such as minimization of transmit power, maximization of throughput and interference averaging. Then, the OB concept is combined with the considered RRM algorithms and a comparative performance analysis between the two types of networks (omni and opportunistic beamforming) is performed in terms of throughput, blocking probability and fairness. The paper aims at providing a useful insight into the way the OB technique affects the performance of different OFDMA networks based on large scale simulations. 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 RRM algorithms has a minor beneficial impact only on the system fairness. © Springer Science+Business Media, LLC. 2011.	en
heal.journalName	Wireless Personal Communications	en
dc.identifier.doi	10.1007/s11277-011-0315-6	en
dc.identifier.volume	65	en
dc.identifier.issue	4	en
dc.identifier.spage	843	en
dc.identifier.epage	861	en