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SF ISAR one-dimensional high-resolution distance imaging method based on atom norm minimization

An imaging method and minimization technology, applied in the direction of radio wave reflection/re-radiation, instruments, measurement devices, etc., can solve problems such as grid mismatch

Active Publication Date: 2021-01-01
PLA OF CHINA AIR FORCE EARLY WARNING ACADEMY LEIDA SERGEANT SCHOOL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] To this end, the present invention provides a SF ISAR one-dimensional high-resolution range imaging method based on atomic norm minimization to overcome the problem of grid mismatch caused by the phenomenon of distance walking in the prior art

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  • SF ISAR one-dimensional high-resolution distance imaging method based on atom norm minimization
  • SF ISAR one-dimensional high-resolution distance imaging method based on atom norm minimization
  • SF ISAR one-dimensional high-resolution distance imaging method based on atom norm minimization

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Embodiment Construction

[0069] In order to make the purpose and advantages of the present invention clearer, the present invention will be further described below with reference to the embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0070] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principle of the present invention, and are not intended to limit the protection scope of the present invention.

[0071] It should be noted that, in the description of the present invention, the terms “upper”, “lower”, “left”, “right”, “inner”, “outer” and other terms indicated in the direction or the positional relationship are based on the drawings. The direction or positional relationship shown is only for the conve...

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Abstract

The invention relates to an SF ISAR one-dimensional high-resolution distance imaging method based on atom norm minimization, and the method comprises the steps of 1, enabling an SF ISAR to transmit anSF signal for the detection of a target; 2,using a receiving end to perform range profile synthesis to realize the high range resolution. By converting a distance imaging problem into an atomic normminimization problem, one-dimensional high-resolution distance imaging is realized in a continuous domain, and the rapid sparse reconstruction is realized by using an ADMM method. Compared with a traditional discretization method, the method has the advantages that the reconstruction performance is good under the conditions of grid mismatch and low measurement data, and the high distance resolution capability is kept.

Description

technical field [0001] The invention relates to the technical field of radar signal processing, in particular to an SFISAR one-dimensional high-resolution range imaging method based on atomic norm minimization. Background technique [0002] The Inverse Synthetic Aperture Radar (ISAR) system uses a wide-band transmission signal to detect the target, and the high range resolution can provide more precise target characteristics. The stepped frequency (stepped frequency, referred to as SF) waveform realizes a large synthetic bandwidth at the receiving end by transmitting narrow-band sub-pulses whose carrier frequency hops continuously. Therefore, the combination of stepped frequency waveform and modern ISAR can not only achieve high one-dimensional range resolution capability, but also is of great significance for reducing system complexity and realizing the multi-mode working mode of radar. Imaging methods have been extensively studied. [0003] At present, the distance synth...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90
CPCG01S13/9064G01S13/9004
Inventor 吕明久徐芳马建朝赵欣陈文峰
Owner PLA OF CHINA AIR FORCE EARLY WARNING ACADEMY LEIDA SERGEANT SCHOOL