Title :
Maximum-likelihood frequency recovery for OFDM signals transmitted over multipath fading channels
Author :
Chiavaccini, Eugenio ; Vitetta, Giorgio M.
Author_Institution :
Dept. of Inf. Eng., Univ. of Modena & Reggio Emilia, Italy
Abstract :
In this paper, a novel feedback frequency synchronizer for orthogonal frequency-division multiplexing signals transmitted over multipath fading channels is described. Its derivation is based on maximum-likelihood estimation techniques and assumes an approximate statistical knowledge of the communication channel. The performance of the proposed algorithm is assessed by computer simulation, and is compared with that provided by other synchronization algorithms and with Cramer-Rao bounds.
Keywords :
OFDM modulation; approximation theory; fading channels; maximum likelihood estimation; multipath channels; synchronisation; Cramer-Rao bounds; OFDM signals; computer simulation; feedback frequency synchronizer; maximum-likelihood estimation; maximum-likelihood frequency recovery; multicarrier modulation; multipath fading channels; orthogonal frequency division multiplexing; statistical knowledge approximation; AWGN; Communication channels; Fading; Feedback; Frequency division multiplexing; Frequency estimation; Frequency synchronization; Maximum likelihood detection; Maximum likelihood estimation; OFDM;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2003.822706
