OFDMA techniques in multicellular networks with total frequency reuse

Zarbouti, D; Stiakogiannakis, I; Tsoulos, G; Athanasiadou, G; Kaklamani, D

dc.contributor.author	Zarbouti, D	en
dc.contributor.author	Stiakogiannakis, I	en
dc.contributor.author	Tsoulos, G	en
dc.contributor.author	Athanasiadou, G	en
dc.contributor.author	Kaklamani, D	en
dc.date.accessioned	2014-03-01T01:31:30Z
dc.date.available	2014-03-01T01:31:30Z
dc.date.issued	2009	en
dc.identifier.issn	0140-3664	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19805
dc.subject	Adaptive modulation	en
dc.subject	Orthogonal frequency division multiple access (OFDMA)	en
dc.subject	Power control	en
dc.subject	Subcarrier allocation	en
dc.subject.classification	Computer Science, Information Systems	en
dc.subject.classification	Engineering, Electrical & Electronic	en
dc.subject.classification	Telecommunications	en
dc.subject.other	Access control	en
dc.subject.other	Beamforming	en
dc.subject.other	Blocking probability	en
dc.subject.other	Civil aviation	en
dc.subject.other	Delta modulation	en
dc.subject.other	Frequency allocation	en
dc.subject.other	Frequency division multiple access	en
dc.subject.other	Frequency division multiplexing	en
dc.subject.other	Management	en
dc.subject.other	Modulation	en
dc.subject.other	Orthogonal frequency division multiplexing	en
dc.subject.other	Power control	en
dc.subject.other	Resource allocation	en
dc.subject.other	Telecommunication networks	en
dc.subject.other	Wireless networks	en
dc.subject.other	Bit rates	en
dc.subject.other	Cell coordinations	en
dc.subject.other	Channel conditions	en
dc.subject.other	Data rate services	en
dc.subject.other	Frequency re use	en
dc.subject.other	High throughputs	en
dc.subject.other	Interference mitigations	en
dc.subject.other	Loading factors	en
dc.subject.other	Lower complexity	en
dc.subject.other	Multicellular environments	en
dc.subject.other	Orthogonal frequency division multiple access (OFDMA)	en
dc.subject.other	Performance gains	en
dc.subject.other	Power controlled	en
dc.subject.other	Power levels	en
dc.subject.other	Radio resource managements	en
dc.subject.other	Simulation results	en
dc.subject.other	Subcarrier allocation	en
dc.subject.other	Subchannel allocations	en
dc.subject.other	Wireless systems	en
dc.subject.other	Adaptive modulation	en
dc.title	OFDMA techniques in multicellular networks with total frequency reuse	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.comcom.2008.09.011	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.comcom.2008.09.011	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	Orthogonal frequency division multiple access (OFDMA) techniques are investigated in this paper. Five subchannel allocation algorithms are analysed and their performance in a multicellular environment is evaluated with simulations. Four schemes of lower complexity, suitable for the early deployment of wireless systems, are compared with a more computationally demanding scheme with respect to their blocking probability, loading factor and offered bit rate. The channel condition of each carrier is calculated and its knowledge is used for power controlled adaptive modulation, as an essential feature of the OFDMA technique. The general radio resource management process is divided into two steps: in the first step a base station allocates carriers to users while in the second step the modulation and power levels for each allocated carrier are defined. The simulation results demonstrate that a wireless system in its early deployment phase (up to 15-30% blocking probability) can employ simple OFDMA techniques capable of achieving high throughput. Furthermore, it is demonstrated that two of the proposed lower complexity schemes, (those based on cell coordination), offer good performance gain for higher data rate services. Nevertheless, these schemes achieve relatively lower gains with adaptive modulation, when compared with the techniques which exploit interference averaging or adaptive interference mitigation. (C) 2008 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Computer Communications	en
dc.identifier.doi	10.1016/j.comcom.2008.09.011	en
dc.identifier.isi	ISI:000263995700009	en
dc.identifier.volume	32	en
dc.identifier.issue	3	en
dc.identifier.spage	522	en
dc.identifier.epage	530	en