Title :
Turbo channel estimation for an orthgonal space-time coded system on fast time-varying channels
Author :
Teyeb, Fathi ; Kammoun, Inès
Author_Institution :
LETI Lab., Nat. Eng. Sch. of Sfax, Sfax, Tunisia
Abstract :
We propose in this paper a turbo channel estimation algorithm for Alamouti´s space-time coded system over fast time varying channels. This algorithm performs an iterative estimation of the multiplicative fading channel according to the maximum a posteriori (MAP) criterion. It requires a convenient representation of the fast varying channel based on the Karhunen-Loeve expansion theorem. It takes into account the coded structure of data symbols in the estimation process thanks to the BCJR algorithm. The validity of the proposed structure is highlighted by simulation results.
Keywords :
channel estimation; fading channels; orthogonal codes; space-time codes; time-varying channels; turbo codes; Alamouti space-time coded system; BCJR algorithm; Karhunen-Loeve expansion theorem; data symbols; fast time-varying channels; iterative estimation; maximum a posteriori criterion; multiplicative fading channel; orthgonal space-time coded system; turbo channel estimation; Channel estimation; Computational modeling; Educational institutions; Fading; Iterative algorithms; Laboratories; Phase shift keying; Time varying systems; Time-varying channels; Transmitting antennas;
Conference_Titel :
Electronics, Circuits, and Systems, 2009. ICECS 2009. 16th IEEE International Conference on
Conference_Location :
Yasmine Hammamet
Print_ISBN :
978-1-4244-5090-9
Electronic_ISBN :
978-1-4244-5091-6
DOI :
10.1109/ICECS.2009.5410824
