Evaluation of a hybrid space-time-frequency coded channel estimation scheme for MIMO OFDM systems

Marousis, AD; Constantinou, P

dc.contributor.author	Marousis, AD	en
dc.contributor.author	Constantinou, P	en
dc.date.accessioned	2014-03-01T01:55:24Z
dc.date.available	2014-03-01T01:55:24Z
dc.date.issued	2006	en
dc.identifier.issn	11092742	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/27716
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-33747031448&partnerID=40&md5=2408740a1792e5e5ac1911ad540718ea	en
dc.subject	Channel estimation and tracking	en
dc.subject	Correlated propagation channels	en
dc.subject	MIMO transceivers	en
dc.subject	Space-time and space-frequency orthogonal block coding	en
dc.subject.other	Codes (symbols)	en
dc.subject.other	Communication channels (information theory)	en
dc.subject.other	Mathematical models	en
dc.subject.other	Signal encoding	en
dc.subject.other	Transceivers	en
dc.subject.other	Channel estimation	en
dc.subject.other	Correlated propagation channels	en
dc.subject.other	Multiple input multiple output (MIMO) transceivers	en
dc.subject.other	Space-frequency orthogonal block coding	en
dc.subject.other	Space-time orthogonal block coding	en
dc.subject.other	Orthogonal frequency division multiplexing	en
dc.title	Evaluation of a hybrid space-time-frequency coded channel estimation scheme for MIMO OFDM systems	en
heal.type	journalArticle	en
heal.publicationDate	2006	en
heal.abstract	This paper presents a channel estimation scheme that is designed for MIMO-OFDM systems capable of operating in time and frequency varying propagation channels. The efficiency of the system is based on the accuracy of the channel estimation and tracking process in a real time operation exploiting the orthogonal property, as well as its easy integration in a real MIMO system. Orthogonality is applied, either in space-frequency, or in space-time dimensions interchangeably for both the preamble and pilot symbols. The estimation scheme targets in utilization of a key factor, like the orthogonal property. This is achieved by applying block coding in space-time for the preamble and space-frequency for pilot symbols or vice versa, implementing a hybrid format. Furthermore, minimization of the processing at the receiver has been applied by estimating only the time-varying channel properties. The evaluation has been performed over the spatial channel model developed for MIMO simulations according to 802.16e case of 3GPP.25.996, taking also into account all IF, RF, DSP, and matching stages in the communication chain. The presented results refer to mean square error (MSE) of the estimator, as well as to overall performance of the system (bit error rate) in various propagation channels, data rates and FEC modes.	en
heal.journalName	WSEAS Transactions on Communications	en
dc.identifier.volume	5	en
dc.identifier.issue	9	en
dc.identifier.spage	1563	en
dc.identifier.epage	1570	en