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Challenges and first results of an airborne passive SAR experiment using a DVB-T transmitter

: Walterscheid, I.; Wojaczek, P.; Cristallini, D.; Summers, A.

Verband Deutscher Elektrotechniker e.V. -VDE-, Berlin; Informationstechnische Gesellschaft -ITG-:
EUSAR 2018, 12th European Conference on Synthetic Aperture Radar : 5-7 June 2018, Aachen, Germany; Electronic Proceedings; DVD
Berlin: VDE-Verlag, 2018
ISBN: 978-3-8007-4636-1
ISBN: 3-8007-4636-0
European Conference on Synthetic Aperture Radar (EUSAR) <12, 2018, Aachen>
Fraunhofer FHR ()

This paper evaluates passive synthetic aperture radar (SAR) using a non-cooperative transmitter of opportunity (DVB-T) and an airborne receiver. Multiple experiments during a measurement campaign in summer 2017 have been conducted to collect data of different bistatic geometries. It has become evident that airborne DVB-T receivers are more affected by co-channel interference (CCI) generated by transmitters at larger distances in contrast to ground-based systems. This leads to a wideband noise jamming, which makes it difficult to reconstruct accurately the reference signal. Therefore, a suppression of the CCI is essential to significantly improve the resulting image. Beside a description of the experiments and the general processing steps, the impact of a CCI suppression approach on the focused image is shown.