Enhancing the readability of the Wigner distribution by exploiting its cross-terms geometry

A simple scheme to improve the readability of the Wigner distribution is introduced in this paper. The method aims to suppress the interference terms by way of multiplying the original distribution with a two-dimensional mask. The design of the mask is based on the localization of the signal components in the time-frequency plane. This is made possible by exploiting the geometry of the cross-terms generated between the signal at hand and a circularly symmetric Gaussian atom. Experimentation has shown that the proposed approach can deliver a more readable representation as compared with other familiar methods of interference reduction.