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Comparison of digital beamforming techniques for enhanced ice sounding radar data processing

Scheiber, R., Prats-Iraola, P., Nannini, M., Villano, M., Morrison, K. and Gebert, N. (2014) Comparison of digital beamforming techniques for enhanced ice sounding radar data processing. In: EUSAR 2014; 10th European Conference on Synthetic Aperture Radar, 3-5 June 2014, Berlin, Germany, pp. 1-4.

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Ice sounding radar from high altitudes is compromised by off-nadir ice surface reflections (clutter), which overlays the nadir signal of interest originating from the bedrock and/or internal ice layers. Multi-aperture antenna radar systems were developed to mitigate the impact of surface clutter allowing spatially variant digital beamforming (DBF) processing of the data received from the individual spatially separated apertures. This paper investigates four different beamforming algorithms: conventional beamsteering, nulling of clutter angles, optimum beamformer and the MVDR beamformer. Comparisons are performed based on simulations for an airborne ice sounding scenarios. In addition, real echograms are computed from data acquired by the P-band POLARIS sensor. Relevant conclusions are drawn with respect to the implementation of a future space-based ice sounding mission.

Item Type:Conference or Workshop Item (Paper)
Divisions:Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology
ID Code:73767

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