A spectral correlation super-resolution method for broadband electromagnetic distribution detection

Abstract

A spectrum correlation super-resolution method for broadband electromagnetic distribution detection, which can restore images formed by broadband radiation sources from 1 to 6 GHz. First, a model is established in the simulation software based on the degraded image of the unknown radiation source to obtain the point spread functions of different frequencies. Then, the point spread functions of different frequencies are subjected to spatial two-dimensional Fourier transform to record the spatial cutoff frequency width. Then draw the corresponding frequency-width curve; perform a two-dimensional Fourier transform on the acquired broadband electromagnetic distribution image and find the spatial cutoff frequency width, and determine the highest frequency of the radiation source on the curve obtained by simulation; use The point spread function corresponding to the highest frequency component is used to process the image, and the L_R iteration method in the narrow-band super-resolution algorithm is used to restore the degraded image. The invention overcomes the incompatibility between the traditional narrow-band super-resolution algorithm and the electromagnetic distribution detection system, can identify the highest frequency in the broadband radiation source, and effectively improves the resolution of the image.

Description

technical field [0001] The present invention involves a broadband hyperfraction method for the broadband electromagnetic distribution detection system, which involves the field of broadband electromagnetic detection and the field of image processing. Background technique [0002] At present, the detection method of electromagnetic distribution mainly adopts the form of antenna and receiver for point-by-point manual detection. This method has many disadvantages, such as slow detection speed, and the antenna will interfere with the original field distribution. The use of parabolic reflexes to detect electromagnetic distribution can achieve fast and non -interference. Affected by the size of the antenna, the diffraction of the broadband electromagnetic distribution detection system is severely limited. How to improve its resolution so that the electromagnetic distribution can be clearly distinguished has become a new difficulty. [0003] Due to the limitation of the diffractio...

AI Technical Summary

Problems solved by technology

[0004] The technical problem of the present invention is to overcome the deficiencies of the prior art, and provide a method for solving the image blur problem in the broadband electromagnetic distribution detection system effectively for the existing narrowband super-resolution algorithm, based on the relationship between the frequency components of the broadband radiation source Existing relevance, using high-frequency components to restore images, and locating low-frequency components, so as to restore blurred images formed by broadband radiation sources, and propose a spectrum correlation super-resolution algorithm for broadband electromagnetic distribution detection

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