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Ka FMCW SAR moving object detection method and apparatus

A detection method and technology for moving targets, applied in measuring devices, radio wave measurement systems, radio wave reflection/re-radiation, etc., can solve the problems of small FMCWSAR systems, large system structures, complex SAR moving target detection methods, etc. problem, to achieve the effects of miniaturization, high image resolution, and simple method

Inactive Publication Date: 2016-09-21
王辉
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Problems solved by technology

[0007] The problem solved by the present invention is that in the prior art, the SAR moving target detection method based on DPCA is complicated, the system structure is huge, and it is no longer applicable to the small FMCW SAR system

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  • Ka FMCW SAR moving object detection method and apparatus
  • Ka FMCW SAR moving object detection method and apparatus

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Embodiment Construction

[0031] Hereinafter, the spirit and essence of the present invention will be further elaborated in conjunction with the drawings and embodiments.

[0032] It can be seen from the background art that in the prior art, the method for detecting moving targets by FMCW SAR is complicated and the system structure is huge. The inventor conducted research on the above-mentioned problems, and believed that the traditional SAR transmitting pulse waves in the prior art needs multiple receiving channels in order to realize moving target detection, resulting in complicated methods and huge systems. It is no longer suitable for small FMCW SAR systems. The inventor conducted further research on the above problems, and provided a FMCW SAR moving target detection method in the present invention. The transmitting wave of the FMCW SAR moving target detection method provided by the present invention is a triangular wave, and the echo signal processing method of the triangular wave is provided. T...

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Abstract

The invention discloses a Ka FMCW SAR moving object detection method and apparatus. The Ka FMCW SAR moving object detection method comprises the steps: 1) emitting triangular wave by an FMCW SAR, segmenting an echo signal, and obtaining a positive frequency modulation echo signal and a negative frequency modulation echo signal; 2) utilizing an RD algorithm to process the positive frequency modulation echo signal and the negative frequency modulation echo signal, and obtaining a positive frequency modulation image and a negative frequency modulation image; 3) compensating the time difference between the positive frequency modulation image and the negative frequency modulation image; and 4) performing subtraction processing on the two images after compensating the time difference. The scheme of the Ka FMCW SAR moving object detection method and apparatus can realize detection of a moving object based on an FMCW SAR.

Description

technical field [0001] The invention belongs to the technical field of synthetic aperture radar signal processing, and relates to a Ka FMCW MiSAR moving target detection method. Background technique [0002] Traditional Synthetic Aperture Radar (SAR) has a large volume and is not easy to install on small aircraft, which limits its application field. With the expansion of SAR applications and the development of unmanned aerial vehicles and high-reliability solid-state devices, whether in military or civilian applications, the demand for small SAR is becoming more and more urgent. Among them, frequency modulated continuous wave SAR (FMCW SAR) is the perfect combination of FMCW and SAR. In combination, it adopts a de-skewing receiving system, which produces a smaller difference frequency bandwidth, reduces the requirements for acquisition equipment, reduces the weight of the equipment, and is easier to install on small UAVs or aircraft model aircraft. Ka-band FMCW SAR has beco...

Claims

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Application Information

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IPC IPC(8): G01S13/90G01S13/86
CPCG01S13/86G01S13/904G01S13/9029
Inventor 王辉
Owner 王辉
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