Jan E. Odegard, Richard G. Baraniuk and Kurt L. Oehler.
Instantaneous frequency estimation using the reassignment method.
Proceedings of the SEG 67th Annual Meeting, November 2-7, 1997, Dallas, TX.

Abstract: This paper explores the method of reassignment for extracting
instantaneous frequency attributes from seismic data. The reassignment
method was first applied to the spectrogram by Kodera, Gendrin and de
Villedary and later generalized to any bilinear time-frequency or
time-scale representation by Auger and Flandrin.  Key to the method is
a nonlinear convolution where the value of the convolution is not
placed at the center of the convolution kernel but rather reassigned
to the center of mass of the function within the kernel. The resulting
reassigned representation yields significantly improved component
localization.  In this paper we will study the impact of the
reassigned time-frequency representation on our ability to reliably
estimate instantaneous frequency for a given seismic signal.