A measure of some time-frequency distributions concentration

A criterion that can provide a measure of time-frequency distribution conce ntration is proposed. In contrast to the norm-based concentration measures it does not need normalization in order to behave properly when cross-terms are present, and also it does not discriminate low concentrated components with respect to the highly concentrated ones within the same distribution. This measure has been used for the automatic window selection in the spect rogram as well as in finding the optimal distribution that can be produced in a transition from the spectrogram toward the pseudo Wigner distribution. (C) 2001 Elsevier Science B.V. All rights reserved.