A Microwave Radar Super-resolution Method Based on Spatial Frequency Dispersion

Abstract

The invention discloses a microwave radar super-resolution method of spatial frequency dispersion, comprising: designing a phase-space variable dispersion antenna with adjustable amplitude and phase distribution on the aperture surface as the transmitting antenna; optimizing the amplitude and phase distribution on the antenna aperture surface; A point at the center of the variable phase is used as the center of rotation of the antenna. During detection, the dispersive antenna rotates and scans around the center of rotation, and the signal in the form of a pulse is used as the transmission signal, which is equivalent to forming a variable phase with the distance between the center of rotation and each variable phase center as the radius. Multi-section arc virtual antenna array in the center; the phase space-varying signal corresponding to the rotation center as the reference point is used as the reference signal, and the spatial matching filter is used to realize the focusing of the multi-section arc virtual antenna array. When the effective aperture of the multi-section arc virtual antenna array is larger than the actual Angle super-resolution of microwave radar can be achieved when the dispersive antenna aperture is small.

Description

technical field [0001] The invention relates to the field of microwave radar system design and signal processing, in particular to a microwave radar super-resolution method of spatial frequency dispersion. Background technique [0002] Microwave radar has the characteristics of all-day and all-weather work, and is an important means of target detection in military and civilian fields. In microwave radar detection, in order to ensure the detection accuracy, the radar system is required to have a certain resolution capability. For application scenarios where the antenna aperture is limited, when the radar system’s resolution is limited by the antenna’s physical aperture and cannot meet the detection accuracy requirements, it is necessary to use a super-resolution method to improve the radar’s resolution. [0003] At present, microwave radar super-resolution methods mainly include: deconvolution, statistical calculation, calculation inversion, scanning time angle correlation a...

AI Technical Summary

Problems solved by technology

[0006] Based on the scanning time angle correlation technology, aiming at the problem that the existing super-resolution method is difficult to generate the transmitted space-varying signal, the present invention proposes a microwave radar super-resolution method with spatial frequency dispersion, which uses the amplitude and phase distribution on the antenna aperture surface to optimize the adjustment and control of the antenna distance. The field amplitude pattern and phase pattern make each variable phase center deviate from the rotation center to obtain phase space-varying signals, and use the space-domain matched filtering of phase space-varying signals to achieve super-resolution

This method can solve various problems of existing super-resolution technology, and effectively realize microwave radar angle super-resolution

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