In order to cancel the interference arising between the two signals transmitted over the horizontal and the vertical polarizations of the electrical field in pol-mux transmission, the coefficients of the channel matrix must be estimated. However, when the coefficients are fast time-varying, to estimate or, better, to track them becomes challenging, especially if the estimation is non-data-aided. This paper shows that a non-data-aided particle filter can be used to track the time-varying coefficients. Also, in the paper the weights and the states of the particles are used in a forward–backward scheme in order to demodulate the signal and get the probability distribution of the transmitted modulation symbols. Computer simulations are presented for validating the proposed method.

Tracking the pol-mux channel by a particle filter

A. Spalvieri;L. Reggiani;L. Dossi
2021-01-01

Abstract

In order to cancel the interference arising between the two signals transmitted over the horizontal and the vertical polarizations of the electrical field in pol-mux transmission, the coefficients of the channel matrix must be estimated. However, when the coefficients are fast time-varying, to estimate or, better, to track them becomes challenging, especially if the estimation is non-data-aided. This paper shows that a non-data-aided particle filter can be used to track the time-varying coefficients. Also, in the paper the weights and the states of the particles are used in a forward–backward scheme in order to demodulate the signal and get the probability distribution of the transmitted modulation symbols. Computer simulations are presented for validating the proposed method.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1183653
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