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[DCS20] On the sensitivity of third-order Volterra MVDR beamformers to interference-pulse shaping filter

Revue Internationale avec comité de lecture : Journal Signal Processing, vol. 170, pp. 1-7, 2020, (doi:org/10.1016/j.sigpro.2019.107424)

Mots clés: Non-linear Non-Gaussian Non-circular Widely linear Third order Volterra Interference MVDR Beamforming Pulse shaping filter Sensitivity Square root raised cosine

Résumé: Linear beamformers are optimal, in a mean square (MS) sense, when the signal of interest (SOI) and ob- servations are jointly Gaussian and circular. Otherwise, optimal beamformers become non-linear with a structure depending on the unknown joint probability distribution of the SOI and observations. In this context, third-order Volterra minimum variance distortionless response (MVDR) beamformers have been proposed recently to improve the performance of linear beamformers in the presence of non-Gaussian and potentially non-circular interference, omnipresent in practical situations. High performance gains have been obtained for binary phase shift keying (BPSK) and quadrature phase shift keying (QPSK) in- terference having a square pulse shaping filter in particular. However in practice, for spectral efficiency reasons, most of signals use non-square pulse shaping filters, such as square root raised cosine filter. It is then important to analyze the sensitivity of third-order MVDR beamformers to interference pulse shaping filter, which is the purpose of this paper.

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BibTeX

@article {
DCS20,
title="{On the sensitivity of third-order Volterra MVDR beamformers to interference-pulse shaping filter}",
author="J. Delmas and P. Chevalier and M. Sadok",
journal="Signal Processing",
year=2020,
volume=170,
pages="1-7",
doi="org/10.1016/j.sigpro.2019.107424",
}