Inverse aperture synthesis in the intermediate zone of radiation for radio image forming by optimal filtration with evolutionary control

Abstract

The algorithm of inverse aperture synthesis using generalized inverse filtering with evolutionary control realized in spatial frequency domain is considered. Optimal values of regularization parameters of filtration with evolutionary control by numerical simulation have been obtained. The optimal values provide the maximization of sharpness of the edges of the reconstructed radio image in combination with minimization of parasitic ripples in it. In contradistinction to the traditional inverse aperture synthesis for single-frequency signal, proposed approach is applied to the samples of signal obtained by transformation of multifrequency measured data to time domain. The suggested method provides improving sharpness of the radio image synthesized.