Digital monopulse radar automatic amplitude and phase calibration method, system and device and medium
A technology of monopulse radar and calibration method, applied in the field of radar, can solve problems such as difficulty in antenna alignment
Active Publication Date: 2021-05-07
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology
[0012] Aiming at the problem of difficult antenna alignment when calibrating W-band digital monopulse radar, an object of the embodiment of the present invention is to provide a fast and accurate method for automatic amplitude and phase calibration of digital monopulse radar
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[0061] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention. For the step numbers in the following embodiments, it is only set for the convenience of illustration and description, and the order between the steps is not limited in any way. The execution order of each step in the embodiments can be adapted according to the understanding of those skilled in the art sexual adjustment.
[0062] In the description of the present invention, multiple means two or more. If the first and the second are described only for the purpose of distinguishing technical features, it cannot be understood as indicating o...
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The invention discloses a digital monopulse radar automatic amplitude and phase calibration method, system and device and a medium, and the method comprises the steps: receiving a first calibration signal through a digital monopulse radar located at a first position, carrying out the fast Fourier transform of the first calibration signal, obtaining a first frequency domain signal, and determining a first amplitude and phase value vector; controlling the digital monopulse radar to rotate to a second position, a third position, a fourth position and a fifth position, and determining a second amplitude-phase value vector, a third amplitude-phase value vector, a fourth amplitude-phase value vector and a fifth amplitude-phase value vector of the digital monopulse radar; determining a receiving calibration coefficient and a first gradient vector of the digital monopulse radar; and determining that the first gradient vector meets a preset convergence condition, receiving a second calibration signal transmitted by the digital monopulse radar, and further determining a transmission calibration coefficient of the digital monopulse radar. The calibration debugging efficiency and accuracy of the digital monopulse radar are improved, and the method can be widely applied to the technical field of radars.
Description
technical field [0001] The invention relates to the technical field of radar, in particular to an automatic amplitude and phase calibration method, system and storage medium of a digital monopulse radar. Background technique [0002] Before the W-band digital monopulse radar system is put into use, each channel of the antenna and the corresponding radio frequency link must be calibrated for sending and receiving amplitude and phase, so that the sum and difference patterns of the antenna meet the design requirements and ensure the accuracy of angle measurement. Applying the digital amplitude-phase calibration technology, the amplitude-phase calibration of the multi-channel radio frequency link and the amplitude-phase calibration of the antenna channel can be completed at the same time, improving the accuracy and efficiency of the calibration. Because the W-band radar antenna has the characteristics of high gain and narrow beam, it is difficult to align the radar system antenn...
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Login to View More IPC IPC(8): G01S7/40
CPCG01S7/4004G01S7/4026
Inventor 姚晨张毅孙厚军
Owner BEIJING INSTITUTE OF TECHNOLOGYGY