Title :
Frequency synchronization for OFDM systems over doubly-selective channels
Author :
Chen, Jianwu ; Wu, Yik-Chung ; Ng, Tung-Sang
Author_Institution :
Dept. of Electr. & Electron. Eng., Univ. of Hong Kong, Hong Kong
fDate :
Nov. 30 2008-Dec. 3 2008
Abstract :
In this paper, we investigate the problem of carrier frequency offset (CFO) estimation for orthogonal frequency division multiplexing (OFDM) system over doubly-selective channels. Representing the doubly-selective channels with basis expansion, the signal model is reformulated and one CFO estimator is derived. Furthermore, the Cramer-Rao bound (CRB) for the estimation problem is derived in closed form. The effectiveness of the proposed scheme is verified by simulations.
Keywords :
OFDM modulation; channel estimation; matrix algebra; synchronisation; Cramer-Rao bound; OFDM systems; carrier frequency offset estimation; doubly-selective channels; frequency synchronization; orthogonal frequency division multiplexing system; Degradation; Fading; Frequency estimation; Frequency synchronization; Interference; Local oscillators; OFDM; Time domain analysis; Transceivers; Transmitters;
Conference_Titel :
Circuits and Systems, 2008. APCCAS 2008. IEEE Asia Pacific Conference on
Conference_Location :
Macao
Print_ISBN :
978-1-4244-2341-5
Electronic_ISBN :
978-1-4244-2342-2
DOI :
10.1109/APCCAS.2008.4746090
