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Modified range-Doppler processing for FM-CW synthetic aperture radar

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3 Author(s)
de Wit, J.J.M. ; Netherlands Organ. for Appl. Sci. Res., The Hague, Netherlands ; Meta, A. ; Hoogeboom, P.

The combination of compact frequency-modulated continuous-wave (FM-CW) technology and high-resolution synthetic aperture radar (SAR) processing techniques should pave the way for the development of a lightweight, cost-effective, high-resolution, airborne imaging radar. Regarding FM-CW SAR signal processing, the motion during the transmission of a sweep and the reception of the corresponding echo were expected to be one of the major problems. In FM-CW SAR, the so-called stop-and-go approximation is no longer valid due to the relatively long sweeps that FM-CW radars transmit. The main effect of the continuous motion is a Doppler frequency shift throughout the SAR observation time. This Doppler frequency shift can be compensated for by modifying the range migration compensation.

Published in:

Geoscience and Remote Sensing Letters, IEEE  (Volume:3 ,  Issue: 1 )