Title :
Blind estimation of timing and carrier frequency offsets in OFDM systems
Author :
Najjar, Leila ; Geller, Benoit ; Larzabal, Pascal
Author_Institution :
Lab. TECHTRA, Ecole Super. des Commun., Tunis, Tunisia
Abstract :
A novel approach is proposed for blind synchronization of Orthogonal Frequency Division Multiplexing (OFDM) systems. The power spectrum and spectral correlation, computed using frequency domain signals, are exploited to independently recover the timing and carrier frequency offsets in closed form. The proposed estimators performance is evaluated for the Additive White Gaussian Noise (AWGN) and the Rayleigh fading channels. They show enhanced performance in terms of Mean Square Error (MSE) when compared to estimators using the temporal autocorrelation. Moreover, the proposed estimators do not require any channel knowledge.
Keywords :
AWGN channels; OFDM modulation; Rayleigh channels; correlation methods; mean square error methods; synchronisation; AWGN; MSE; OFDM; Rayleigh fading channels; additive white Gaussian noise; blind estimation; blind synchronization; carrier frequency offsets; frequency domain signals; mean square error; orthogonal frequency division multiplexing; power spectrum; spectral correlation; temporal autocorrelation; timing frequency offsets; AWGN channels; Abstracts; Estimation; Frequency-domain analysis; Interference; OFDM;
Conference_Titel :
Signal Processing Conference, 2009 17th European
Conference_Location :
Glasgow
Print_ISBN :
978-161-7388-76-7
