Low-frequency ultrawideband array-antenna SAR for stationary and moving target imaging

Lars M.H. Ulander; Hans Hellsten

doi:10.1117/12.354592

20 July 1999 Low-frequency ultrawideband array-antenna SAR for stationary and moving target imaging

Lars M.H. Ulander, Hans Hellsten

Proceedings Volume 3704, Radar Sensor Technology IV; (1999) https://doi.org/10.1117/12.354592
Event: AeroSense '99, 1999, Orlando, FL, United States

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.

Citation Download Citation

Lars M.H. Ulander and Hans Hellsten "Low-frequency ultrawideband array-antenna SAR for stationary and moving target imaging", Proc. SPIE 3704, Radar Sensor Technology IV, (20 July 1999); https://doi.org/10.1117/12.354592

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