Polarimetric radar crosstalk removal during sparse image formation

Abstract

We extend previous work in sparsity-regularized radar imaging to the case of multiple, coupled polarization channels. We demonstrate the ability to extract key canonical polarization signatures while emphasizing spatial sparsity and removing channel crosstalk. When the crosstalk is known, measured data can be decoupled prior to sparse imaging. However, the proposed incorporation of channel crosstalk in the sparse imaging optimization is preferred, as it enables future research of cases when crosstalk is not invertible or is not known.