Target detection method and device of frequency modulated continuous wave staring radar, and computer equipment
A frequency-modulated continuous wave, target detection technology, applied in target recognition and radar fields, can solve problems such as low target detection accuracy, and achieve the effect of reducing the amount of calculation, reducing the amount of calculation, and improving efficiency.
Pending Publication Date: 2021-07-13
北京清瑞维航技术发展有限公司
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[0003] However, in the long-term observation of moving targets by FMCW staring radar (Frequency Modulated Continuous Wave Radar), the target motion will cross the range unit, cross Doppler unit and cross azimuth unit, resulting in range walking, Doppler walking and azimuth walk
[0004] Due to the range, Doppler and azimuth movement of the target, the traditional coherent accumulation method has low target detection accuracy
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[0063] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, not to limit the present application.
[0064]With the development of radar system and target detection technology, weak maneuvering targets have brought certain security risks, and the detection of weak maneuvering targets has become a research hotspot of radar. Long-term coherent accumulation technology is an effective detection technology for weak maneuvering targets, which can improve the detection ability of weak maneuvering targets under low signal-to-noise ratio. However, in long-term observations, the target motion will cross range cells, cross Doppler cells and cross azimuth cells, resulting in range walk, Doppler walk ...
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The invention relates to a target detection method and device of a frequency-modulated continuous wave staring radar, computer equipment and a storage medium. The method comprises the following steps: acquiring a frame of radar echo signal; dividing the radar echo signal into a plurality of sub-apertures; in the first stage, performing three-dimensional fast Fourier processing on the radar echo signal in the sub-aperture to obtain a first signal, wherein a target does not cross a distance unit, a Doppler unit and an azimuth unit in one sub-aperture; in the second stage, performing generalized Radon Fourier transform on the first signal between the sub-apertures to obtain a second signal, wherein the length of the generalized Radon Fourier transform in the second stage is the number of the sub-apertures and is far smaller than the pulse number, so that the calculated amount is reduced; and performing constant false alarm target detection according to the second signal. According to the method, two-stage coherent accumulation is full-coherent processing and does not have non-coherent accumulation, so that the accuracy of target detection is improved, meanwhile, the calculation amount is reduced, and the efficiency of target detection is improved.
Description
technical field [0001] The present application relates to the field of radar technology and the field of target recognition technology, in particular to a target detection method, device, computer equipment and storage medium of a frequency-modulated continuous wave staring radar. Background technique [0002] With the development of radar system and target detection technology, the detection of weak maneuvering targets has become a research hotspot of radar. Long-term coherent accumulation technology is an effective detection technology for weak maneuvering targets, which improves the detection ability under low signal-to-noise ratio. [0003] However, in the long-term observation of moving targets by FMCW staring radar (Frequency Modulated Continuous Wave Radar), the target motion will cross the range unit, cross Doppler unit and cross azimuth unit, resulting in range walking, Doppler walking and azimuth walk. [0004] Due to the distance walking, Doppler walking and azi...
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Login to View More IPC IPC(8): G01S13/06G01S7/41
CPCG01S13/06G01S7/411Y02A90/10
Inventor 王德祥王龙翚
Owner 北京清瑞维航技术发展有限公司