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Microwave stare correlated imaging method under condition of low signal to noise ratio

A technology of correlative imaging and microwave staring, applied in the field of radar, can solve the problems of low signal-to-noise ratio of echo signal and inability to meet the needs of imaging

Active Publication Date: 2018-02-09
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

In the traditional gaze correlation imaging scheme, limited by factors such as transmit power and target distance, the signal-to-noise ratio (SNR) of the echo signal is usually low and cannot meet the needs of imaging

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  • Microwave stare correlated imaging method under condition of low signal to noise ratio
  • Microwave stare correlated imaging method under condition of low signal to noise ratio
  • Microwave stare correlated imaging method under condition of low signal to noise ratio

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Embodiment Construction

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. 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.

[0022] The embodiment of the present invention provides a microwave staring correlation imaging method under the condition of low signal-to-noise ratio. The problem of poor imaging effect caused by the low signal-to-noise ratio of scattered echoes in imaging, related imaging scenarios such as figure 1 As shown, the main steps are as figure 2 shown, including:

[0023] Step 11. Each transmitting unit of the microwave random radiation source array...

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Abstract

The invention discloses a microwave stare correlated imaging method under the condition of a low signal to noise ratio, and the method comprises the steps: enabling all transmitting units of a microwave random radiation source array to transmit random frequency modulation pulse signals with the long time widths synchronously; forming a random radiation field in an antenna wave beam coverage area,enabling the random radiation field to interact with an observation object, and generating echo waves; synchronously receiving scattered echo signals through single-way receivers, and carrying out theparallel pulse compression processing; optimizing a selected scattered echo signal sample through a threshold, and constructing a new correlated imaging model with a corrected random radiation fieldat a corresponding moment based on parallel pulse compression processing; and obtaining an observation target image through inversion and a correlated imaging algorithm based on the novel correlated imaging model. The method can achieve the high-resolution imaging of the target under the condition of the low signal to noise ratio.

Description

technical field [0001] The invention relates to the field of radar technology, in particular to a microwave staring correlation imaging method. Background technique [0002] With the development of Radar Imaging technology, the application range of radar has expanded from the initial detection and ranging to the acquisition of panoramic images of specific areas, and thus has received extensive attention and research. In the field of radar imaging, although the more mature synthetic aperture radar (SAR) and inverse synthetic aperture radar (ISAR) imaging technologies can obtain higher resolution, they both require a large observation angle of view to obtain a higher azimuth. resolution, and its application range is greatly limited. The angular resolution of traditional real-aperture radar staring imaging is limited by the actual antenna array aperture, so its application range is greatly limited. [0003] Microwave staring correlation imaging has achieved rapid development ...

Claims

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Application Information

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IPC IPC(8): G01S13/89
CPCG01S13/89
Inventor 郭圆月袁博王东进陈卫东邓杰夏瑞李泓旻
Owner UNIV OF SCI & TECH OF CHINA
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