Evaluation of an orthogonal SFBC channel estimation scheme for mimo OFDM Wireless Systems

Marousis, AD; Constantinou, P

dc.contributor.author	Marousis, AD	en
dc.contributor.author	Constantinou, P	en
dc.date.accessioned	2014-03-01T02:44:03Z
dc.date.available	2014-03-01T02:44:03Z
dc.date.issued	2006	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/31634
dc.subject	Channel estimation and tracking	en
dc.subject	Link level evaluation	en
dc.subject	MIMO transceivers	en
dc.subject	OFDM	en
dc.subject	Space-frequency block coding	en
dc.subject.other	Alamouti's scheme	en
dc.subject.other	Channel conditions	en
dc.subject.other	Channel estimator	en
dc.subject.other	Channel property	en
dc.subject.other	Communication chains	en
dc.subject.other	Data rates	en
dc.subject.other	Data symbols	en
dc.subject.other	Key factors	en
dc.subject.other	MIMO transceiver	en
dc.subject.other	MIMO transceivers	en
dc.subject.other	MIMO-OFDM	en
dc.subject.other	Multi carrier systems	en
dc.subject.other	Orthogonal design	en
dc.subject.other	Orthogonality	en
dc.subject.other	Performance evaluation	en
dc.subject.other	Pilot symbols	en
dc.subject.other	Propagation channels	en
dc.subject.other	Space time frequency coding	en
dc.subject.other	Space-frequency	en
dc.subject.other	Space-frequency block coding	en
dc.subject.other	Spatial channel models	en
dc.subject.other	Sub-carriers	en
dc.subject.other	Time variant	en
dc.subject.other	Wireless systems	en
dc.subject.other	Ad hoc networks	en
dc.subject.other	Channel estimation	en
dc.subject.other	Communication channels (information theory)	en
dc.subject.other	Computer simulation	en
dc.subject.other	Crack propagation	en
dc.subject.other	Data flow analysis	en
dc.subject.other	Estimation	en
dc.subject.other	Information services	en
dc.subject.other	Mean square error	en
dc.subject.other	MIMO systems	en
dc.subject.other	Mobile telecommunication systems	en
dc.subject.other	Orthogonal functions	en
dc.subject.other	Transceivers	en
dc.subject.other	Frequency estimation	en
dc.title	Evaluation of an orthogonal SFBC channel estimation scheme for mimo OFDM Wireless Systems	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1007/978-3-540-70760-8_23	en
heal.identifier.secondary	http://dx.doi.org/10.1007/978-3-540-70760-8_23	en
heal.publicationDate	2006	en
heal.abstract	This paper presents the design and evaluation of a channel estimation scheme that is efficient by means of both the mean square error (MSE) of channel estimation/tracking and its incorporation in a real MIMO system. 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 and RF stages in the communication chain. Orthogonality has been applied in space-frequency dimension for both preamble and pilot symbols, as well as for the data symbols, with the application of Alamouti's scheme. In 4G multicarrier systems that use space-time-frequency coding, orthogonal design turns into a key factor for the performance of the system since the channel has to remain about constant during the transmission of one orthogonal block, something which becomes quite challenging in highly time-variant propagation channels. Furthermore, space-frequency block coding (SFBC) becomes more efficient as the number of subcarriers increases (802.16e, 802.20, etc). The modified channel estimation scheme applied to MIMO transceiver is also efficient in minimization of the processing requirements at the receiver side by estimating only those channel properties that have been changed assuming that the general channel conditions (low/high mobility) are known. The results presented refer to the normalized MSE of the channel estimator and the overall performance evaluation (BER) of the system in various propagations channels, data rates and forward error correction modes.	en
heal.journalName	WINSYS 2006 - International Conference on Wireless Information Networks and Systems, Proceedings	en
dc.identifier.doi	10.1007/978-3-540-70760-8_23	en
dc.identifier.spage	13	en
dc.identifier.epage	18	en