A Gaussian mixture approach to blind equalization of block-oriented wireless communications

Authors:
Frederic Lehmann
Affiliations:
Institut TELECOM, TELECOM SudParis, Department CITI, UMR, CNRS, Evry Cedex, France
Venue:
EURASIP Journal on Advances in Signal Processing - Special issue on advanced equalization techniques for wireless communications
Year:
2010

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Abstract

We consider blind equalization for block transmissions over the frequency selective Rayleigh fading channel. In the absence of pilot symbols, the receiver must be able to perform joint equalization and blind channel identification. Relying on a mixed discretecontinuous state-space representation of the communication system, we introduce a blind Bayesian equalization algorithm based on a Gaussian mixture parameterization of the a posteriori probability density function (pdf) of the transmitted data and the channel. The performances of the proposed algorithm are compared with existing blind equalization techniques using numerical simulations for quasi-static and time-varying frequency selective wireless channels.