Open Access

Particle Filtering Equalization Method for a Satellite Communication Channel

  • Stéphane Sénécal1Email author,
  • Pierre-Olivier Amblard2 and
  • Laurent Cavazzana3
EURASIP Journal on Advances in Signal Processing20042004:591429

https://doi.org/10.1155/S1110865704404090

Received: 23 April 2003

Published: 7 November 2004

Abstract

We propose the use of particle filtering techniques and Monte Carlo methods to tackle the in-line and blind equalization of a satellite communication channel. The main difficulties encountered are the nonlinear distortions caused by the amplifier stage in the satellite. Several processing methods manage to take into account these nonlinearities but they require the knowledge of a training input sequence for updating the equalizer parameters. Blind equalization methods also exist but they require a Volterra modelization of the system which is not suited for equalization purpose for the present model. The aim of the method proposed in the paper is also to blindly restore the emitted message. To reach this goal, a Bayesian point of view is adopted. Prior knowledge of the emitted symbols and of the nonlinear amplification model, as well as the information available from the received signal, is jointly used by considering the posterior distribution of the input sequence. Such a probability distribution is very difficult to study and thus motivates the implementation of Monte Carlo simulation methods. The presentation of the equalization method is cut into two parts. The first part solves the problem for a simplified model, focusing on the nonlinearities of the model. The second part deals with the complete model, using sampling approaches previously developed. The algorithms are illustrated and their performance is evaluated using bit error rate versus signal-to-noise ratio curves.

Keywords and phrases

traveling-wave-tube amplifier Bayesian inference Monte Carlo estimation method sequential simulation particle filtering

Authors’ Affiliations

(1)
The Institute of Statistical Mathematics
(2)
Groupe Non Linéaire, Laboratoire des Images et des Signaux (LIS), ENSIEG
(3)
École Nationale Supérieure d'Informatique et de Mathématiques Appliquées de Grenoble (ENSIMAG)

Copyright

© Sénécal et al. 2004