Index Terms (2010)
BibTeX
@MISC{Delignon10indexterms,
author = {Yves Delignon},
title = {Index Terms},
year = {2010}
}
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Abstract
In this paper, we address the challenging problem of the OFDM reception in the presence of phase distortions. Phase noise and carrier frequency offset seriously degrade the performances of OFDM systems by destroying orthogonality of the subcarriers. Based on a Markov Chain Monte Carlo sampling mechanization, our approach consists in jointly estimating the phase noise, the frequency offset and the transmitted symbols. The proposed algorithm is implemented in the time domain in order to benefit from the redundancy information induced by the cyclic prefix and from the time correlation of the OFDM signal owing to the presence of virtual and/or pilot subcarriers. The algorithm’s efficiency is enhanced by incorporating the Rao-Blackwellization technique as well as various sampling improvement strategies. Simulation results, provided in terms of bit error rate (BER) and mean square error (MSE), clearly illustrate the efficiency and the robustness of the proposed estimator.
Keyphrases
index term phase noise frequency offset simulation result time correlation time domain ofdm system challenging problem carrier frequency bit error rate phase distortion rao-blackwellization technique markov chain monte carlo mean square error redundancy information cyclic prefix pilot subcarriers transmitted symbol ofdm signal ofdm reception improvement strategy algorithm efficiency
