Signal-to-noise ratio gain in multi-channel SAR with digital beamforming

Conference paper (2015)

Authors

Marwan Younis Deutsches Zentrum für Luft- und Raumfahrt (DLR)
Francisco López-Dekker Deutsches Zentrum für Luft- und Raumfahrt (DLR)
Gerhard Krieger Deutsches Zentrum für Luft- und Raumfahrt (DLR)
A Moreira Deutsches Zentrum für Luft- und Raumfahrt (DLR)
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Published Date

10-11-2015

Language

English

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Abstract

The signal-to-noise ratio of a radar system is described through the well-known radar equation, which can be adapted to apply to imaging Synthetic Aperture Radar (SAR). Extension to multi-channel SAR systems utilizing digital beam-forming turns out to be treacherous; the pivotal question being, if and how to include the gain of the multiple antenna apertures. This paper puts an effort into answering this question in a simple and comprehensible, yet mathematically rigorous way.