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

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1 Author(s)
Sungbin Im ; Dept. of Inf. & Telecommun. Eng., Soong Sil Univ., Seoul, South Korea

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

Published in:

Military Communications Conference, 1996. MILCOM '96, Conference Proceedings, IEEE  (Volume:3 )

Date of Conference:

21-24 Oct 1996