On-Board Doppler Filtering for Data Volume Reduction in Spaceborne SAR Systems

Villano M, Krieger G, Del Zoppo V (2014)

Publication Type: Conference contribution

Publication year: 2014

Publisher: IEEE Computer Society

Edited Volumes: Proceedings International Radar Symposium

Conference Proceedings Title: International Radar Symposium 2014

Event location: Gdansk PL

ISBN: 9786176075523

URI: https://elib.dlr.de/89557/

DOI: 10.1109/IRS.2014.6869240


High-resolution wide-swath (HRWS) synthetic aperture radar (SAR) systems based on digital beamforming (DBF) in elevation are very attractive for the observation of dynamic processes on the Earth's surface. However, HRWS systems are inherently associated with a huge data volume. Moreover, in order to comply with azimuth ambiguity requirements, a pulse repetition frequency (PRF) much higher than the required processed Doppler bandwidth is often desirable. The data volume can be drastically reduced, if on-board Doppler filtering and decimation are performed prior to downlink. A finite impulse response (FIR) filter with a relatively small number of taps suffices to completely suppress the additional ambiguous components and recover the original impulse response, provided that the filter's transfer function is compensated for in the processing. This strategy is also applicable to staggered-SAR systems, where on-board Doppler filtering and resampling can be jointly implemented. © 2014 Warsaw University of Technology (WUT).

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Villano, M., Krieger, G., & Del Zoppo, V. (2014). On-Board Doppler Filtering for Data Volume Reduction in Spaceborne SAR Systems. In International Radar Symposium 2014. Gdansk, PL: IEEE Computer Society.


Villano, Michelangelo, Gerhard Krieger, and Vincenzo Del Zoppo. "On-Board Doppler Filtering for Data Volume Reduction in Spaceborne SAR Systems." Proceedings of the 2014 15th International Radar Symposium, IRS 2014, Gdansk IEEE Computer Society, 2014.

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