Increasing the efficiency of rake receivers for ultra-wideband applications

Doukeli, AP; Lioumpas, AS; Karagiannidis, GK; Frangos, PV

dc.contributor.author	Doukeli, AP	en
dc.contributor.author	Lioumpas, AS	en
dc.contributor.author	Karagiannidis, GK	en
dc.contributor.author	Frangos, PV	en
dc.date.accessioned	2014-03-01T02:09:20Z
dc.date.available	2014-03-01T02:09:20Z
dc.date.issued	2012	en
dc.identifier.issn	09296212	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/29821
dc.subject	RAKE receivers	en
dc.subject	UWB propagation channels	en
dc.subject.other	Channel conditions	en
dc.subject.other	Computational resources	en
dc.subject.other	Diversity rich environments	en
dc.subject.other	Output signal-to-noise ratios	en
dc.subject.other	Performance Gain	en
dc.subject.other	Power delay profiles	en
dc.subject.other	Propagation measurements	en
dc.subject.other	RAKE receiver	en
dc.subject.other	Ultrawideband applications	en
dc.subject.other	UWB channel	en
dc.subject.other	UWB propagation channel	en
dc.subject.other	Cellular radio systems	en
dc.subject.other	Computer applications	en
dc.subject.other	Electrical engineering	en
dc.subject.other	Ultra-wideband (UWB)	en
dc.title	Increasing the efficiency of rake receivers for ultra-wideband applications	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/s11277-010-0090-9	en
heal.identifier.secondary	http://dx.doi.org/10.1007/s11277-010-0090-9	en
heal.publicationDate	2012	en
heal.abstract	In diversity rich environments, such as in Ultra-Wideband (UWB) applications, the a priori determination of the number of strong diversity branches is difficult, because of the considerably large number of diversity paths, which are characterized by a variety of power delay profiles (PDPs). Several Rake implementations have been proposed in the past, in order to reduce the number of the estimated and combined paths. To this aim, we introduce two adaptive Rake receivers, which combine a subset of the resolvable paths considering simultaneously the quality of both the total combining output signal-to-noise ratio (SNR) and the individual SNR of each path, reducing the number of combined paths, while keeping the desirable performance. These schemes achieve better adaptation to channel conditions compared to other known receivers, without further increasing the complexity. Their performance is evaluated in different practical UWB channels, whose models are based on extensive propagation measurements. The proposed receivers compromise between the power consumption, complexity and performance gain for the additional paths, resulting in important savings in power and computational resources. © 2010 Springer Science+Business Media, LLC.	en
heal.journalName	Wireless Personal Communications	en
dc.identifier.doi	10.1007/s11277-010-0090-9	en
dc.identifier.volume	62	en
dc.identifier.issue	3	en
dc.identifier.spage	715	en
dc.identifier.epage	728	en