Share Email Print
cover

Proceedings Paper

Signal separation and synthesis from modified superresolution short-time Fourier transforms
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Signal separation or editing of components in the time-frequency domain remains an important problem that is equivalent to time-varying filtering. In this paper, a method to better carry out this process is presented and is based on the use of superresolution in the short-time Fourier transform (STFT) domain. This enhancement of the STFT is accomplished by nonparametric adaptive stationary extrapolations performed on each block of time samples. Superresolution also facilitates the definition of a component's support region in the time-frequency plane before it is edited. Synthesis is performed using the overlap add method that has been previously used to reconstruct a signal from its STFT, or a modified/edited version of it. A heuristic comparison is presented using a test signal using both: conventional and superresolution STFT-domain editing. Applications to radar imaging are also discussed.

Paper Details

Date Published: 18 August 1995
PDF: 12 pages
Proc. SPIE 2562, Radar/Ladar Processing and Applications, (18 August 1995); doi: 10.1117/12.216967
Show Author Affiliations
Gabriel Thomas, Univ. of Texas/El Paso (United States)
Sergio D. Cabrera, Univ. of Texas/El Paso (United States)


Published in SPIE Proceedings Vol. 2562:
Radar/Ladar Processing and Applications
William J. Miceli, Editor(s)

© SPIE. Terms of Use
Back to Top