Dispersive Modes in the Time Domain: Analysis and Time-Frequency Representation


Journal Article

Four algorithms for time-frequency (TF) distributions are considered for the processing and interpretation of dispersive time-domain (TD) data: The short-time Fourier transform, frequency and time-domain wavelets, and a new ARMA-based representation. The TF resolutions of the various distributions are discussed and compared with reference to results for the scattered fields from a chirped finite grating excited by a pulsed plane wave. The processing in the TF phase space extracts TD phenomenology, in particular the instantaneous dispersion relation—with its associated time-dependent frequencies—descriptive of the local TD Floquet modes on the chirped truncated grating. © 1994 IEEE

Full Text

Duke Authors

Cited Authors

  • Carin, L; Felsen, LB; Kralj, D; Pillai, SU; Lee, WC

Published Date

  • January 1, 1994

Published In

Volume / Issue

  • 4 / 1

Start / End Page

  • 23 - 25

International Standard Serial Number (ISSN)

  • 1051-8207

Digital Object Identifier (DOI)

  • 10.1109/75.267683

Citation Source

  • Scopus