Target-body radar scattering cross section obtaining method and device based on darkroom frequency sweep

Abstract

The invention discloses a target-body radar scattering cross section obtaining method and device based on darkroom frequency sweep. In the method and device, in a preset frequency range, according to preset frequency-sweep frequency points, a unit target point radar scattering cross section frequency domain information frequency which contains the different frequency-sweep frequency points is constructed and Fourier inversion is performed, so that unit target point radar scattering cross section time domain information is generated and software time domain gate processing is performed so that unit target point radar scattering cross section filtering time domain information is formed; Fourier inversion is performed on the formed unit target point radar scattering cross section filtering time domain information and unit target point radar scattering cross section filtering frequency domain information is obtained; and according to the obtained unit target point radar scattering cross section filtering frequency domain information, pre-obtained target-body radar scattering cross section filtering frequency domain information is corrected and a calibrated target-body radar scattering cross section is obtained. Through application of the target-body radar scattering cross section obtaining method and device, resource cost needed calibration and time needed in the calibration can be reduced.

Description

technical field [0001] The present invention relates to radar simulation technology, in particular to a method and device for acquiring a radar cross section (RCS, Radar Cross Section) of an object based on frequency sweeping in an anechoic chamber. Background technique [0002] The radar cross section (RCS) of the target body is a physical quantity that quantitatively characterizes the scattering intensity of the target body to the radar irradiation wave. The echo signal of the calibration body is determined. With the rapid development of electronic warfare, the stealth technology can effectively reduce the distance of the radar to detect the target and improve the stealth performance of the target, and the stealth performance of the target mainly depends on the size of the target RCS. Therefore, reducing the target radar cross section by various methods has become the main purpose of stealth technology research. [0003] With the development of stealth technology, the RC...

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Problems solved by technology

However, this method increases the sweep frequency points and expands the sweep bandwidth, thus increasing the amount of raw data collected, for example, the complex volume of the target echo signal, the complex volume of the empty room echo signal, and the volume echo of the calibration body. The amount of wave signal complex data collection reduces the test speed, making the calibration of radar cross-section requires large resource overhead and long calibration time

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