Target detection method and device and equipment
A target detection and target technology, applied in the field of target detection, can solve the problems of destroying the coherence of radar signals, difficult target imaging, poor anti-jamming performance, etc.
Active Publication Date: 2021-06-01
AIR FORCE UNIV PLA
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Problems solved by technology
However, the anti-jamming performance of the system radar is poor. Once it is subjected to electromagnetic interference, it will be difficult for the system radar to effectively image the target.
In order to improve the anti-jamming performance of radar, modern radar widely adopts a multi-parameter agile system. For example, the center frequency and pulse repetition frequency of the radar will jump randomly between pulses. most existing ISAR imaging algorithms cannot be used under this regime
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[0029] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. In the description of the present application, the terms "first", "second" and the like are only used for distinguishing descriptions, and cannot be understood as indicating or implying relative importance.
[0030] Such as figure 1 As shown, this embodiment provides an electronic device 1, including: at least one processor 11 and a memory 12, figure 1 Take a processor as an example. Processor 11 and memory 12 are connected via bus 10 . The memory 12 stores instructions that can be executed by the processor 11, and the instructions are executed by the processor 11, so that the electronic device 1 can execute all or part of the process of the method in the following embodiments, so as to detect each scattering point of the target in the radar Distribution information within the imaged scene.
[003...
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The invention provides a target detection method and device and equipment. The method comprises the steps that: an echo signal obtained after a transmitting signal of a radar is reflected by a target is acquired, the target is in an imaging scene of the radar, the target comprises a plurality of scattering points, and the imaging scene comprises a plurality of distance units and a plurality of azimuth units; sparse processing is performed on the echo signal based on the pulse repetition frequency, the slow time sampling point and the reference center frequency of the radar to obtain the sparse representation of the echo signal; based on the sparse representation, signal reconstruction is carried out on the sub-echo signal of each distance unit of the radar to obtain a reconstructed signal in each distance unit, and the reconstructed signal comprises amplitude information and azimuth information; and according to the amplitude information and the azimuth information, the reconstruction signals in each distance unit are arranged according to the azimuth units to obtain the distribution information of each scattering point of the target in the imaging scene. According to the target detection method and device and equipment of the invention, ISAR imaging is carried out on the echo signal when the center frequency and the pulse repetition frequency of the radar are agile at the same time.
Description
technical field [0001] The present application relates to the technical field of signal processing, and in particular, to a target detection method, device and equipment. Background technique [0002] ISAR (Inverse Synthetic Aperture Radar) imaging technology can obtain the spatial shape of the target according to the electromagnetic scattering characteristics of the target, which has great research value. Improving the accuracy of imaging and the stability of imaging performance in complex situations are important research directions in the field of ISAR imaging. At present, many scholars have carried out research on complex moving target imaging, translation compensation, new system radar imaging and other topics, and have achieved fruitful results. In recent years, the theory of compressed sensing has also provided new methods and new ideas for the development of ISAR imaging. [0003] However, most of the related researches on ISAR imaging are based on the traditional ...
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IPC IPC(8): G01S13/90
CPCG01S13/90Y02A90/10
Inventor 黄大荣刘丰恺郭新荣
Owner AIR FORCE UNIV PLA