SMOOTHED PSEUDO-WIGNER DISTRIBUTION, CHOI-WILLIAMS DISTRIBUTION, AND CONE-KERNEL REPRESENTATION - AMBIGUITY-DOMAIN ANALYSIS AND EXPERIMENTAL COMPARISON

The smoothed pseudo-Wigner distribution, the Choi-Williams distributio n, and the cone-kernel representation are three time-frequency represe ntations (TFRs) which feature an attenuation of cross (interference) t erms as compared with the Wigner distribution. In this paper, we use a n analysis of ambiguity-domain weighting functions for comparing the i nterference attenuation and time-frequency concentration properties of the three TFRs. These properties are then further investigated by stu dying the results obtained for a set of simple two-component signals, This analysis shows important effects and performance limitations whos e understanding is essential for a practical application of the TFRs.