Target detection and imaging method integrating MIMO radar and ISAR

A target detection and imaging method technology, which is applied in the field of radar target detection and imaging, can solve the problems of changing uncertainties, motion compensation and target separation difficulties, large amount of calculation, radar long-term coherent accumulation time, etc., to eliminate multiple Effects of Puller aliasing, reduction of hardware influence factors, and cost avoidance

Pending Publication Date: 2021-03-05
BEIHANG UNIV
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Problems solved by technology

[0008] New ISAR imaging methods include super-resolution imaging algorithms, large-rotation-angle imaging algorithms, compressed sensing imaging algorithms, and three-dimensional imaging algorithms. The uncertainty of the change brings great difficulties to motion compensation and target separation, and the algorithms used are usually very computationally intensive

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  • Target detection and imaging method integrating MIMO radar and ISAR
  • Target detection and imaging method integrating MIMO radar and ISAR
  • Target detection and imaging method integrating MIMO radar and ISAR

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[0057] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the implementation of the present invention. example, not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0058] The present invention is a target detection and imaging method integrating MIMO radar and ISAR. At first, a multi-input and multi-output antenna array arrangement is designed to transmit electromagnetic waves and collect echoes. Signals undergo analog-to-digital conversion and digital signal processing, and the imaging results are displayed on the display; in the process of...

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Abstract

The invention provides a target detection and imaging method integrating MIMO radar and ISAR, and relates to the field of radar target detection and imaging. The method specifically comprises the steps that: firstly, an application scene based on the ISAR and the MIMO radar is constructed, a TX radio frequency assembly and an RX radio frequency assembly form an MIMO radar antenna array plane, andthe TX radio frequency assembly sends linear frequency modulation LFM signals to a to-be-detected target in a time-sharing mode; an echo signal is generated through time delay; dechirping operation iscarried out on the echo signal to obtain a time domain echo signal; then, MIMO signal processing is carried out on the time domain echo signal to obtain the distance, the speed, the azimuth angle andthe signal-to-noise ratio of the to-be-detected target; meanwhile, ISAR signal processing is carried out on the time domain echo signal, and the distance, speed and height of the to-be-detected target are obtained; and finally, the MIMO signal processing result is combined with the ISAR signal processing result to obtain a final target detection result and an imaging result. According to the invention, the space sampling capability of the radar is improved, and the coherent accumulation time and the complexity of array elements are reduced.

Description

technical field [0001] The present invention relates to the field of radar target detection and imaging, in particular to a method for target detection and imaging of an integrated multiple-input multiple-output (Multi-input Multi-output, MIMO) radar and an inverse synthetic aperture radar (Inverse Synthetic Aperture Radar, ISAR). Background technique [0002] Radar (Radar, Radio Detection And Ranging), as a target detection and tracking tool, has applications in military, civil and meteorological fields. Not only can it be used to detect cooperative targets, but it can also be used to detect non-cooperative targets due to the high resolution of the radar in the ray direction. By imaging air targets, ground targets and sea targets, it is useful in both military and civilian fields Great application value. [0003] MIMO radar refers to a radar with multiple TX antennas and multiple RX antennas. Since the angular resolution of the radar is related to the aperture size of the ...

Claims

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Application Information

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IPC IPC(8): G01S13/90
CPCG01S13/9021
Inventor 刘凯张红莉罗喜伶曹先彬张涛王珺珺许乙付
Owner BEIHANG UNIV
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