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 language | English (US) |
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Pages (from-to) | 23-25 |
Number of pages | 3 |
Journal | IEEE Microwave and Guided Wave Letters |
Volume | 4 |
Issue number | 1 |
DOIs | |
State | Published - Jan 1994 |
ASJC Scopus subject areas
- General Engineering
- General Physics and Astronomy