Dispersive modes in the time domain

analysis and time-frequency representation

L. Carin, L. B. Felsen, D. Kralj, Unnikrishna Pillai, W. C. Lee

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish (US)
Pages (from-to)23-25
Number of pages3
JournalIEEE Microwave and Guided Wave Letters
Volume4
Issue number1
DOIs
StatePublished - Jan 1994

Fingerprint

time domain analysis
Time domain analysis
Processing
Fourier transforms
gratings
autoregressive moving average
frequency distribution
phenomenology
plane waves

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Dispersive modes in the time domain : analysis and time-frequency representation. / Carin, L.; Felsen, L. B.; Kralj, D.; Pillai, Unnikrishna; Lee, W. C.

In: IEEE Microwave and Guided Wave Letters, Vol. 4, No. 1, 01.1994, p. 23-25.

Research output: Contribution to journalArticle

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