Adaptive turbo code-multiplexed pilot channel estimation for MIMO MC-CDMA systems in highly time-variant propagation channels

Marousis, A; Constantinou, P

dc.contributor.author	Marousis, A	en
dc.contributor.author	Constantinou, P	en
dc.date.accessioned	2014-03-01T02:45:56Z
dc.date.available	2014-03-01T02:45:56Z
dc.date.issued	2009	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/32471
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-70349854834&partnerID=40&md5=c5b9f1e0983322dd8834cbd3c47cedcf	en
dc.relation.uri	http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5068330	en
dc.relation.uri	http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=05068330	en
dc.subject	Channel Estimation	en
dc.subject	Channel Model	en
dc.subject	Interference Cancellation	en
dc.subject	Spatial Diversity	en
dc.subject	System Design	en
dc.subject	Turbo Code	en
dc.subject.other	A-frames	en
dc.subject.other	Accurate channel estimation	en
dc.subject.other	Adaptive channel estimation	en
dc.subject.other	Channel model	en
dc.subject.other	De-spreading	en
dc.subject.other	Interference cancellation	en
dc.subject.other	MIMO MC-CDMA system	en
dc.subject.other	Multi-carrier CDMA systems	en
dc.subject.other	Multiple transmit and receive antennas	en
dc.subject.other	Number of iterations	en
dc.subject.other	Orthogonal code	en
dc.subject.other	Pilot channels	en
dc.subject.other	Propagation channels	en
dc.subject.other	Proposed architectures	en
dc.subject.other	Self-interferences	en
dc.subject.other	Spatial diversity	en
dc.subject.other	Spreading codes	en
dc.subject.other	Superimposed signal	en
dc.subject.other	System design	en
dc.subject.other	System robustness	en
dc.subject.other	Time variant	en
dc.subject.other	Time variant channels	en
dc.subject.other	Virtual users	en
dc.subject.other	Code division multiple access	en
dc.subject.other	Codes (symbols)	en
dc.subject.other	Computer aided software engineering	en
dc.subject.other	Estimation	en
dc.subject.other	Multicarrier modulation	en
dc.subject.other	Multiplexing	en
dc.subject.other	Receiving antennas	en
dc.subject.other	Channel estimation	en
dc.title	Adaptive turbo code-multiplexed pilot channel estimation for MIMO MC-CDMA systems in highly time-variant propagation channels	en
heal.type	conferenceItem	en
heal.identifier.secondary	5068330	en
heal.publicationDate	2009	en
heal.abstract	In this work an adaptive channel estimation (CE) scheme is presented for multicarrier CDMA systems with multiple transmit and receive antennas. The scheme is based on orthogonal code-multiplexed pilots that are characterized as virtual users and their number is determined in an adaptive way, on a frame level, according to the propagation channel conditions. The unique underlying pattern of pilots is used for CE before the data despreading operation. In addition, an iterative architecture has been incorporated and operates either in interference cancellation mode, or in virtual user one achieving remarkable results with respect to the residual self-interference elimination produced by the superimposed signal and the deorthogonalization effects caused by the time-variant channel properties. Furthermore, a preamble part has been included in the system design as an option for an initial accurate channel estimation which consequently results in optimization of the resources not only with respect to the spreading codes used for pilots, but also to the number of iterations achieving overall high system robustness. The proposed architecture has been evaluated in realistic highly time-variant propagation channels (802.16e channel model of 3GPP.25.996/SCM definition) for various constellation formats and FEC modes with MT=2 Tx and MR=1,⋯,4 RX antennas operating in spatial diversity mode.	en
heal.journalName	European Conference on Antennas and Propagation, EuCAP 2009, Proceedings	en
dc.identifier.spage	3414	en
dc.identifier.epage	3418	en