Wide-area range high-resolution multi-objective inverse synthetic aperture radar imaging technology
An inverse synthetic aperture and radar imaging technology, applied in the field of communication, to achieve the effect of overcoming high-resolution imaging monitoring
Inactive Publication Date: 2016-01-06
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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[0006] Aiming at the above-mentioned problems faced by the existing ISAR technology, the present invention proposes a wide-area high-resolution multi-target ISAR imaging system based on space-time processing, and provides a corresponding imaging processing method, effectively solving the problem of wide-area high-resolution target imaging problem
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[0021] Refer to attached figure 1 , the specific implementation steps of the present invention are as follows:
[0022] Step 1, the entire antenna array quickly scans horizontally to transmit signals
[0023] Such as figure 2 As shown, the radar continuously scans and transmits N sub-pulse signals within a pulse repetition interval (PRI). Each sub-pulse signal is exactly the same, only the beam pointing angle is different. The sub-pulse transmission interval can be one sub-pulse width, or other suitable transmission intervals can be selected according to the specific conditions of the system, as long as it is greater than the sub-pulse width, and the entire transmission and reception time meets the requirements of the system timing diagram. Such as image 3 As shown, when sub-pulse 1 is transmitted, the radar beam points to sub-beam 1 shown in the figure; after sub-pulse 1 is launched, the radar immediately switches the beam pointing to sub-beam 2, and simultaneously tran...
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The invention discloses a wide-area range high-resolution multi-objective inverse synthetic aperture radar imaging technology. With the wide-area range high-resolution multi-objective inverse synthetic aperture radar imaging technology adopted, the problem of incapability of an existing ISAR system to realize wide-area range high-resolution multi-objective imaging can be solved. The implementation process of the wide-area range high-resolution multi-objective inverse synthetic aperture radar imaging technology includes the following steps that: (1) a whole antenna array fast scans emission signals along a transverse direction; (2) each receiving channel simultaneously receives echo signals; (3) space-time processing is performed on the echo signals received by the receiving channels so as to separate sub beam echoes; and (4) the separated sub beam echoes are subjected to multi-target imaging processing respectively. According to the wide-area range high-resolution multi-objective inverse synthetic aperture radar imaging technology of the invention, the emission bandwidth signals are scanned rapidly and transversely, and the space-time processing is performed on the echo signals received by the receiving channels, and therefore, wide-area range high-resolution multi-objective ISAR imaging can be realized with system power requirements satisfied.
Description
technical field [0001] The invention belongs to the technical field of communication, and further relates to an Inverse Synthetic Aperture Radar (Inverse Synthetic Aperture Radar, ISAR) wide-area high-resolution multi-target imaging technology in the technical field of radar imaging. Background technique [0002] Inverse synthetic aperture radar can perform all-weather, all-weather, and long-distance imaging of space targets. It has important application value in military and civilian fields such as strategic defense and radar astronomy, and is one of the research hotspots of modern radar. [0003] At the same time, it is the pursuit goal of radar imaging technology to realize high-resolution wide-area multi-target monitoring imaging. High-resolution images can provide more detailed features of the target for subsequent target recognition. The inverse synthetic aperture radar obtains high range resolution by transmitting broadband signals, while the azimuth resolution is ob...
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IPC IPC(8): G01S13/90
CPCG01S13/9017G01S13/9064
Inventor 杨桃丽杨磊淦小健王勇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA