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Proceedings Paper

Adaptive time-frequency ISAR processing
Author(s): Victor C. Chen
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Paper Abstract

Conventional radar processors use the Fourier transform to retrieve Doppler information. In order to use the Fourier transform adequately, some restrictions must be applied: the scatterers must remain in their range cells and their Doppler frequency contents should be stationary during the entire imaging time duration. If the Doppler frequency contents are time-varying, the Doppler spectrum obtained from the Fourier transform becomes smeared, and, thus the image resolution is degraded. However, the restrictions on the Fourier processing can be lifted if the Doppler information can be retrieved with the time-frequency transform which does not require a stationary Doppler spectrum. Therefore, the image blurring caused by the time- varying Doppler spectrum can be resolved without applying sophisticated motion compensation techniques to the individual scatterers.

Paper Details

Date Published: 5 November 1996
PDF: 8 pages
Proc. SPIE 2845, Radar Processing, Technology, and Applications, (5 November 1996); doi: 10.1117/12.257216
Show Author Affiliations
Victor C. Chen, Naval Research Lab. (United States)

Published in SPIE Proceedings Vol. 2845:
Radar Processing, Technology, and Applications
William J. Miceli, Editor(s)

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