Title :
Pilot-symbol-aided iterative channel estimation for OFDM-based systems
Author :
Ozbek, Berna ; Le Ruyet, Didier ; Panazio, Cristiano
Author_Institution :
Electron. & Commun. Lab, Conservatoire Nat. des Arts et Metiers (CNAM), Paris, France
Abstract :
In this paper, we propose a pilot-symbol-aided iterative channel estimation for coded OFDM-based systems. We use the symbol APP provided by the channel decoder to form groups of virtual pilots. According to their reliabilities, we combine these groups to improve the channel estimation. We also compare the proposed algorithm with the EM algorithm.
Keywords :
OFDM modulation; channel estimation; expectation-maximisation algorithm; iterative methods; APP; EM algorithm; channel decoder; coded OFDM-based systems; pilot-symbol-aided iterative channel estimation; virtual pilots; Channel estimation; Interpolation; Iterative decoding; OFDM; Reliability; Time-frequency analysis; Vectors;
Conference_Titel :
Signal Processing Conference, 2005 13th European
Conference_Location :
Antalya
Print_ISBN :
978-160-4238-21-1
