Title :
A novel integer frequency offset estimator for OFDM
Author :
Chen, Chen ; Li, Jiandong ; Han, Gang
Author_Institution :
Broadband Wireless Commun. Lab., Xidian Univ., Xi´´an, China
fDate :
31 May-2 June 2004
Abstract :
A novel estimator for integer frequency offset estimation of OFDM systems is derived, which is based on maximum likelihood (ML) technique and exploits the differential information between two consecutive OFDM data symbols sequences in frequency domain. The reason why the ML estimator has better performance than the conventional method is analyzed. The effects of integer frequency offset, system parameters, and differential PN sequence on the performances of the two estimators are analyzed. How to select the differential sequence is also studied. By computer simulations, the performance of the ML estimator is compared with that of the conventional method for the additive white Gaussian noise (AWGN) channel and a multipath fading channel. The simulation results are in good agreement with the analytical study.
Keywords :
AWGN channels; OFDM modulation; fading channels; frequency estimation; maximum likelihood estimation; multipath channels; OFDM data symbols sequence; OFDM system; additive white Gaussian noise channel; differential PN sequence; integer frequency offset estimator; maximum likelihood technique; multipath fading channel; orthogonal frequency division multiplexing; AWGN; Additive white noise; Computational modeling; Computer simulation; Fading; Frequency domain analysis; Frequency estimation; Maximum likelihood estimation; OFDM; Performance analysis;
Conference_Titel :
Emerging Technologies: Frontiers of Mobile and Wireless Communication, 2004. Proceedings of the IEEE 6th Circuits and Systems Symposium on
Print_ISBN :
0-7803-7938-1
DOI :
10.1109/CASSET.2004.1322909
