Performance Enhancement of Convolution Noise Jamming Against SAR

This paper introduces a mathematical model and illustration of the convolution noise jamming technique at the SAR sensor after two dimensional matched filter in both fast and slow time dimensions. Two parameters are proposed to control the convolution noise jamming effect on the output image of SAR sensor. These parameters are noise to SAR pulse width ratio (NSPR) and noise to synthetic time ratio (NSTR). Controlling both NSPR and NSTR allows the possibility to determine the coverage of the convolution noise jamming on the output image of SAR, consequently allows smart use of the power to produce high intensity noise strips or patches to cover specific target area rather than covering the whole scene. Simulation results conclude the influence of varying the proposed control parameters on the jamming to signal ratio and the noise coverage on the SAR resulted image. For results validation, the structural similarity index (SSIM) is applied to evaluate the quality of the output SAR image under the effect of jamming.