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Imaging phased-array radar wave beam control method

A phased array radar and beam control technology, which is applied in the field of phased array radar, can solve problems such as unsatisfactory needs, and achieve the effect of reducing the amount of calculation

Inactive Publication Date: 2016-01-20
NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] The application of the linear frequency modulation step signal in the radar has promoted the improvement of the beam control method, and the original method of distributing the phase once every cycle can no longer meet the needs

Method used

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  • Imaging phased-array radar wave beam control method
  • Imaging phased-array radar wave beam control method
  • Imaging phased-array radar wave beam control method

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Embodiment Construction

[0019] The present invention adopts the beam control method based on the frequency modulation step signal, and the beam control method needs to arrange N times of phases in one radar imaging period, and the center frequency of N times of phases is incrementally increased. Due to the short calculation time caused by N times of phase distribution, the present invention reduces the amount of calculation through an optimization algorithm to solve the problem of short time for multiple phase distribution.

[0020] The flow of the beam control method is as follows:

[0021] 1. Each imaging cycle waits for the interruption of the arrival of the command from the system central computer.

[0022] 2. After the interrupt arrives, the system command is received. The content of the command includes the azimuth angle, elevation angle, and the center frequency of the first chirp sub-pulse of the imaging cycle.

[0023] 3. Calculation of intermediate variables where v is the speed of light...

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Abstract

The invention provides an imaging phased-array radar wave beam control method. The method comprises the steps of: receiving a system instruction after central machine instruction interruption comes, calculating an orientation phase feeding gradient and a pitching phase feeding gradient of each time of phase distribution so as to obtain a phase shift value of each array element in each time of phase distribution, and starting a next radar imaging period when the central machine instruction interruption comes. According to the invention, a phase distribution algorithm is optimized, the calculation amount is reduced, the wave beam control problem caused by application of frequency modulation stepping signals is solved, the sending of the frequency modulation stepping signals of a radar system is realized, the functions of a phased-array radar are effectively expanded, and the wave beam control scheme realizing N times of phase distribution in one radar imaging period is provided, so that the phased-array radar is enabled to send the frequency modulation stepping signals for imaging.

Description

technical field [0001] The invention relates to the field of phased array radar with imaging function, in particular to a beam control design of phased array radar with imaging function. Background technique [0002] Phased array radar performs spatial beam scanning by adjusting the phase of the phase shifter of each array element. The period of each phase shift is relatively long, generally one radar duty cycle. Since the phase of the phase shifter cannot change with the frequency of the transmitted or received signal, the instantaneous bandwidth of the radar signal is constrained. Radar imaging requires high resolution, and the improvement of resolution depends on the widening of the transmitted signal bandwidth. In order to obtain high-resolution images, the linear frequency modulation stepping signal is selected as the transmitting signal, and the radar echo signal with large bandwidth is equivalently synthesized. [0003] The linear frequency modulation step signal is...

Claims

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Application Information

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IPC IPC(8): G05B13/02
Inventor 周倩乔益丽
Owner NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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