Controlling intercell interference in CDMA-based fixed wireless networks through multirate techniques

Arapoglou, P-DM; Papaioannou, PI; Panagopoulos, AD; Cottis, PG

dc.contributor.author	Arapoglou, P-DM	en
dc.contributor.author	Papaioannou, PI	en
dc.contributor.author	Panagopoulos, AD	en
dc.contributor.author	Cottis, PG	en
dc.date.accessioned	2014-03-01T01:33:04Z
dc.date.available	2014-03-01T01:33:04Z
dc.date.issued	2010	en
dc.identifier.issn	0929-6212	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20301
dc.subject	CDMA based LMDS	en
dc.subject	Cochannel interference	en
dc.subject	IEEE 802.16	en
dc.subject	Multicode CDMA	en
dc.subject	Orthogonal variable spreading factor CDMA	en
dc.subject.classification	Telecommunications	en
dc.subject.other	CDMA based LMDS	en
dc.subject.other	Channel effect	en
dc.subject.other	Channel statistics	en
dc.subject.other	Code assignments	en
dc.subject.other	Direct sequence code division multiple access	en
dc.subject.other	DS-CDMA	en
dc.subject.other	Dynamic code assignments	en
dc.subject.other	Fixed broadband wireless access networks	en
dc.subject.other	IEEE 802.16	en
dc.subject.other	Intercell interference	en
dc.subject.other	Long term	en
dc.subject.other	Multi rate	en
dc.subject.other	Multi-code CDMA	en
dc.subject.other	Multiple access scheme	en
dc.subject.other	Multiple-path	en
dc.subject.other	Multirate CDMA	en
dc.subject.other	Orthogonal variable spreading factor	en
dc.subject.other	Rain fading	en
dc.subject.other	Resource utilizations	en
dc.subject.other	Signal to interference ratio	en
dc.subject.other	Static codes	en
dc.subject.other	WiMAX(worldwide interoperability for microwave access)	en
dc.subject.other	Broadband networks	en
dc.subject.other	Channel estimation	en
dc.subject.other	Cochannel interference	en
dc.subject.other	Code division multiple access	en
dc.subject.other	Optimal systems	en
dc.subject.other	Specifications	en
dc.subject.other	Turbo codes	en
dc.subject.other	Wimax	en
dc.subject.other	Wireless networks	en
dc.subject.other	Multiple access interference	en
dc.title	Controlling intercell interference in CDMA-based fixed wireless networks through multirate techniques	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/s11277-009-9779-z	en
heal.identifier.secondary	http://dx.doi.org/10.1007/s11277-009-9779-z	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	A number of research works have suggested a possible capacity advantage when employing direct sequence-code division multiple access (DS-CDMA) instead of the more common time division multiple access option for fixed broadband wireless access networks operating at millimeter-waves. The choice of this multiple access scheme, which, up to now, has not been foreseen by recent WiMax (worldwide interoperability for microwave access) standards, exhibits an improved performance in terms of cochannel interference in the upstream, even though it experiences higher interference in the downstream. The present paper focuses on enhancing the bottleneck downstream performance of fixed wireless networks by proposing a methodology for controlling the signal-to-interference ratio throughout the cell, so that all subscribers meet the given interference quality-of-service specifications. This is accomplished by exploiting the properties of a combination of multirate CDMA techniques. The paper describes a simple policy for code assignment, which is proved to be optimal, incorporating the effect of rain fading over multiple paths. The performance of the algorithm is tested against single code DS-CDMA both under long term channel statistics (static code assignment) and under dynamic channel effects (dynamic code assignment). The first test verifies the compliance of all sector subscribers with more demanding SIR specifications, while the second yields a significant improvement in terms of resource utilization. © 2009 Springer Science+Business Media, LLC.	en
heal.publisher	SPRINGER	en
heal.journalName	Wireless Personal Communications	en
dc.identifier.doi	10.1007/s11277-009-9779-z	en
dc.identifier.isi	ISI:000281260400012	en
dc.identifier.volume	54	en
dc.identifier.issue	4	en
dc.identifier.spage	729	en
dc.identifier.epage	744	en