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Abstmct-OFDM systems typically use coding and interleaving across subchannels to exploit Requency diversity on frequency-selective channels. This paper presents e low-complexity iterative algorithm for combined blind and semi-blind channel estimation and so& decoding in coded OFDM systems. Channel estimation is performed in the time domain using the expectation maximization (EM) algorithm to take advantage of the channel-length constraint and the extra observation offered by the cyclic-prefix.doi:10.1109/glocom.2002.1188376 dblp:conf/globecom/Al-RawiABC02 fatcat:tqkk5ycd5jcedmuggut5gufnue