Experimental violation of the Start-Stop-Approximation using a Holistic Rail-based UWB FMCW-SAR System

Konferenz: EUSAR 2016 - 11th European Conference on Synthetic Aperture Radar
06.06.2016 - 09.06.2016 in Hamburg, Germany

Tagungsband: EUSAR 2016

Seiten: 4Sprache: EnglischTyp: PDF

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Wielage, Matthis; Cholewa, Fabian; Pirsch, Peter; Blume, Holger (Leibniz Universität Hannover, Institute of Microelectronic Systems (IMS), Appelstr. 4, 30167 Hannover, Germany)

This paper presents a rail-based near-field FMCW-SAR system, used for generating data with up to 25.6 GHz bandwidth at velocities up to 4 m/s. System parameters like squint or depression angel are freely adjustable. Image processing is implemented on an FPGA-based hardware in real-time with the backprojection algorithm. Results are optically projected onto the scene for verification. As a practical example, the consequence of a start-stop-approximation violation with varying velocity and ramp-length is shown. Additionally, the correction of this violation is investigated.