Exploiting error-control coding and cyclic-prefix in channel estimation for coded OFDM systems

G. Al-Rawi, T. Al-Naffouri, A. Bahai, J. Cioffi
Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE  
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.
more » ... the cyclic-prefix. The proposed technique converges within e single OFDM ~y mhol and, therefore, has a minimum latency and is suitable for fast time-varying channels.
doi:10.1109/glocom.2002.1188376 dblp:conf/globecom/Al-RawiABC02 fatcat:tqkk5ycd5jcedmuggut5gufnue