15 September 1998 Multichannel imaging for wideband wide-angle polarimetric synthetic aperture radar
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Abstract
In this paper we introduce multi-channel techniques to compensate for effects of antenna shading and crosstalk in wideband, wide-angle full polarization radar imaging. We model the systems as a 2D integral operator that includes the transmit pulse function, receive and transmit antenna transfer functions, and response from scattering objects. Existing imaging algorithms provide an approximate inversion of this integral operator, without compensation for the effect of antenna transfer functions. Thus, standard processing results in image quality diminished by the inherent variation of the antenna response--in magnitude, phase and polarization--across a large band of frequencies and wide range of aspect angles. We propose three inversion techniques for this integral operator, to improve polarization purity and to achieve localized point spread functions. The first technique uses a local approximation to the system model, and propose a conceptually simple method for the inversion. The other two techniques propose inversion methods for the exact system model in different transform domains. The result is imagery with improved polarization purity and a more localized point spread function.
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Emre Ertin, Emre Ertin, Lee C. Potter, Lee C. Potter, John W. McCorkle, John W. McCorkle, "Multichannel imaging for wideband wide-angle polarimetric synthetic aperture radar", Proc. SPIE 3370, Algorithms for Synthetic Aperture Radar Imagery V, (15 September 1998); doi: 10.1117/12.321853; https://doi.org/10.1117/12.321853
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