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Proceedings Paper

Low-frequency ultrawideband array-antenna SAR for stationary and moving target imaging
Author(s): Lars M.H. Ulander; Hans Hellsten
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Paper Abstract

The paper discusses the necessity and feasibility of designing a SAR system for detection of low-signature stationary and moving targets, e.g. concealed by foliage. In particular, we investigate the basic requirements, measurement principles and signal processing algorithms. We show that the problem can be formulated using the same principles as ultra-wideband SAR by adding multiple antenna elements. Time-domain signal processing is emphasized, and we formulate such SAR algorithms to simultaneously focus both stationary and moving targets. The computational effort to the basic algorithm is dramatically reduced by factorization into a number of recursive stages. In this manner, the time-domain algorithm has essentially the same numerical efficiency as FFT-based methods. We also include a brief description of the present development of an airborne SAR system with an antenna array and operating in the 200 - 800 MHz band called LORA.

Paper Details

Date Published: 20 July 1999
PDF: 10 pages
Proc. SPIE 3704, Radar Sensor Technology IV, (20 July 1999); doi: 10.1117/12.354592
Show Author Affiliations
Lars M.H. Ulander, Swedish Defence Research Establishment (Sweden)
Hans Hellsten, Swedish Defence Research Establishment (Sweden)

Published in SPIE Proceedings Vol. 3704:
Radar Sensor Technology IV
Robert Trebits; James L. Kurtz, Editor(s)

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