Blind coarse timing offset estimation for CP-OFDM and ZP-OFDM transmission over frequency selective channels

Authors:
Vincent Le Nir;Toon van Waterschoot;Jonathan Duplicy;Marc Moonen
Affiliations:
Department of Electrical Engineering, ESAT, SISTA, Katholieke Universiteit Leuven, Leuven-Heverlee, Belgium and Department of Communication Information Systems and Sensors, Royal Military Academy, ...;Department of Electrical Engineering, ESAT, SISTA, Katholieke Universiteit Leuven, Leuven-Heverlee, Belgium;Agilent Technologies Labs, Rotselaar, Belgium;Department of Electrical Engineering, ESAT, SISTA, Katholieke Universiteit Leuven, Leuven-Heverlee, Belgium
Venue:
EURASIP Journal on Wireless Communications and Networking
Year:
2009

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Abstract

We present a blind coarse timing offset estimation technique for CP-OFDM and ZP-OFDM transmission over frequency selective channels. The technique exploits the cyclic prefix or zero-padding structure to estimate the starting position of the OFDM symbols without requiring any additional pilots. Simulation results are performed on various channel models with timing and frequency offsets. The presented technique is compared with the autocorrelation-based technique and various techniques in frequency selective channels. Our algorithm shows better performance results than those of the autocorrelation-based technique in NLOS channels, where the most predominant channel path is usually not the first arrival path.