Interrupted-sampling repeater jamming suppression with one-dimensional semi-parametric signal decomposition

Protective measures against interrupted-sampling repeater jamming are vital for coherent wideband radar. This paper proposes a one-dimensional semi-parametric method for the interrupted sampling repeater jamming suppression by representing the target and jamming signal uniformly with semi-parametric models. Instead of utilizing the two-dimensional time-frequency analysis, we straightforwardly perform one-dimensional echo parameter estimation with sparse decomposition. Afterward, a modified k-means clustering method distinguishes jamming components from target components. The semi-parametric signal decomposition algorithm is of high efficiency and low complexity simultaneously by introducing fast operations. Extensions to suppress interrupted-sampling repeater jamming of synthetic aperture radar are also illustrated. Comparisons with traditional methods show the superiority of our proposal in actual working conditions. (C) 2022 Elsevier Inc. All rights reserved.