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

摘要

Linear beamformers are optimal.in a mean square (MS) sense.when the signal of interest (SOI) and observations 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) interference 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.