Receiver architectures for OFDMA systems with subband carrier allocation

Konstantinos, M; Adamis, A; Constantinou, P

dc.contributor.author	Konstantinos, M	en
dc.contributor.author	Adamis, A	en
dc.contributor.author	Constantinou, P	en
dc.date.accessioned	2014-03-01T02:45:46Z
dc.date.available	2014-03-01T02:45:46Z
dc.date.issued	2008	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/32377
dc.subject	Frequency correction	en
dc.subject	Frequency offset	en
dc.subject	OFDMA	en
dc.subject	Polyphase filters	en
dc.subject	Subband allocation	en
dc.subject	Synchronization	en
dc.subject.other	Filter banks	en
dc.subject.other	Frequency division multiple access	en
dc.subject.other	Frequency division multiplexing	en
dc.subject.other	Orthogonal frequency division multiplexing	en
dc.subject.other	Signal encoding	en
dc.subject.other	Signal processing	en
dc.subject.other	Signal receivers	en
dc.subject.other	Synchronization	en
dc.subject.other	Telecommunication links	en
dc.subject.other	Telecommunication systems	en
dc.subject.other	Frequency correction	en
dc.subject.other	Frequency offset	en
dc.subject.other	OFDMA	en
dc.subject.other	Polyphase filters	en
dc.subject.other	Subband allocation	en
dc.subject.other	Frequency allocation	en
dc.title	Receiver architectures for OFDMA systems with subband carrier allocation	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1109/EW.2008.4623916	en
heal.identifier.secondary	http://dx.doi.org/10.1109/EW.2008.4623916	en
heal.identifier.secondary	4623916	en
heal.publicationDate	2008	en
heal.abstract	OFDM systems are very sensitive in phase noise and frequency dispersion. Thus, time and frequency synchronization tasks are very crucial for the proper signal recovery in the receiver. The difficulties and challenges are multiplied if we consider a multiuser OFDM system (OFDMA) where the subcarriers are shared between different users. The receiver has the task to choose optimal sampling instants and to align the subcarrier frequencies of an OFDM symbol that contains signals from multiple users. In this study the use of filter banks is considered in order to reduce Intercarrier interference in such a system and simplify the synchronization procedures that must take place. The proposed schemes are applicable to adjacent subcarrier permutation OFDMA systems where users are separated in bands of adjacent subcarriers. In order to achieve low processing load, techniques of multirate signal processing are adopted. The DFT - polyphase filters are the basic elements of the processing chain. Moreover the filtering procedure is preferred to be divided in multiple stages. The computational workload for each structure is determined and some measures for the reduction of the computational burden are presented.	en
heal.journalName	EW2008 - 14th European Wireless Conference 2008, Electronic Proceedings	en
dc.identifier.doi	10.1109/EW.2008.4623916	en