Adaptive equalization of nonlinear digital satellite channels using a frequency-domain Volterra filter

The objective of this paper is to present a new structure for an adaptive nonlinear equalizer for digital transmission over a nonlinear satellite channel with PSK modulation. The adaptive nonlinear equalizer is based on a discrete frequency-domain, third-order Volterra filter with the multidimensional overlap-save filtering technique, and on the block least mean square (BLMS) algorithm for updating the filter coefficients. Since the proposed equalizer performs fast convolution by blocks, in decision-directed mode, it provides potentially larger savings in computational complexity compared to the conventional time-domain Volterra equalizers. The feasibility and practicality of the proposed equalizer structure is demonstrated by utilizing it to equalize a nonlinear satellite channel.

[1]  Stephen A. Dyer,et al.  Digital signal processing , 2018, 8th International Multitopic Conference, 2004. Proceedings of INMIC 2004..

[2]  Adel A. M. Saleh,et al.  Frequency-Independent and Frequency-Dependent Nonlinear Models of TWT Amplifiers , 1981, IEEE Trans. Commun..

[3]  Sergio Benedetto,et al.  Nonlinear Equalization of Digital Satellite Channels , 1982, IEEE J. Sel. Areas Commun..

[4]  William E. Ryan,et al.  Performance of adaptive Volterra equalizers on nonlinear satellite channels , 1995, Proceedings IEEE International Conference on Communications ICC '95.

[5]  Mischa Schwartz,et al.  Automatic equalization using the discrete frequency domain , 1973, IEEE Trans. Inf. Theory.

[6]  Francesco Piazza,et al.  Non linear satellite radio links equalized using blind neural networks , 1991, [Proceedings] ICASSP 91: 1991 International Conference on Acoustics, Speech, and Signal Processing.

[7]  Sheng Chen,et al.  Reduced-complexity multi-stage blind clustering equaliser , 1993, Proceedings of ICC '93 - IEEE International Conference on Communications.

[8]  N. K. Jablon.  Complexity of frequency-domain adaptive filtering for data modems , 1989, Twenty-Third Asilomar Conference on Signals, Systems and Computers, 1989..

[9]  E. Powers,et al.  A Fast Method Of Discrete Third-Order Volterra Filtering , 1996, IEEE Transactions on Signal Processing.

[10]  Po-Rong Chang,et al.  Adaptive Decision Feedback Equalization for Digital Satellite Channels Using Multilayer Neural Networks , 1995, IEEE J. Sel. Areas Commun..

[11]  Giancarlo Prati,et al.  Self-Orthogonalizing Adaptive Equalization in the Discrete Frequency Domain , 1984, IEEE Trans. Commun..

[12]  Hikmet Sari,et al.  Analysis of predistortion, equalization, and ISI cancellation techniques in digital radio systems with nonlinear transmit amplifiers , 1989, IEEE Trans. Commun..

[13]  R. de Figueiredo.  The Volterra and Wiener theories of nonlinear systems , 1982, Proceedings of the IEEE.

[14]  S. Benedetto,et al.  Modeling and Performance Evaluation of Nonlinear Satellite Links-A Volterra Series Approach , 1979, IEEE Transactions on Aerospace and Electronic Systems.