MCMC sampling for joint estimation of phase distortions and transmitted symbols in OFDM systems

François Septier 1, 2 Yves Delignon 2
2 LAGIS-SI
LAGIS - Laboratoire d'Automatique, Génie Informatique et Signal
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.
Complete list of metadatas

Cited literature [20 references]  Display  Hide  Download

https://hal-imt.archives-ouvertes.fr/hal-00566491
Contributor : François Septier <>
Submitted on : Wednesday, February 16, 2011 - 2:23:15 PM
Last modification on : Thursday, February 21, 2019 - 10:34:10 AM
Long-term archiving on : Tuesday, May 17, 2011 - 2:57:22 AM

File

Paper_DSP2010.pdf
Files produced by the author(s)

Identifiers

Citation

François Septier, Yves Delignon. MCMC sampling for joint estimation of phase distortions and transmitted symbols in OFDM systems. Digital Signal Processing, Elsevier, 2011, 21 (2), pp.341-353. ⟨10.1016/j.dsp.2010.10.003⟩. ⟨hal-00566491⟩

Share

Metrics

Record views

442

Files downloads

267