Digital array real-time calibration device and method

Abstract

The invention relates to a digital array real-time calibration device and method and belongs to the technical field of radar. The device comprises a digital array antenna, a calibration assembly, a transmitting and receiving assembly, a coupling calibration feed network, and a data processing assembly. The data processing assembly controls the calibration assembly to generate a receiving calibration signal. Through utilization of the coupling calibration feed network, the digital array antenna and the transmitting and receiving assembly, receiving calibration data is obtained based on the receiving calibration signal. The data processing assembly controls the transmitting and receiving assembly to generate a transmitting calibration signal. Through utilization of the digital array antenna,the coupling calibration feed network and the calibration assembly, a transmitting calibration coupling signal is obtained based on the transmitting calibration signal. The data processing assembly computes transmitting and receiving channel calibration compensation data of a digital array according to the receiving calibration data and the transmitting calibration data. According to the device and the method, an automatic reliable scheme for channel calibration of equipment is provided, the inconsistency resulting from design and manufacture batch difference, equipment temperature drift, performance aging and the like is solved, and the device and the method are adaptive to replacement of the equipment and change of an environment.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a digital array real-time calibration device and method. Background technique [0002] With the rapid development of chip technology, high-speed sampling, transmission and processing devices, this also accelerates the development of radar technology, making the use of digital phased array technology in radar easier and more common. . Using digital phased array technology, the key point is to calibrate the amplitude and phase of each radio frequency channel to ensure the effective synthesis of the power signals of each channel in space during transmission, and to ensure that the signals of each channel are truly aligned during reception to obtain the proposed design direction Figure, so the amplitude and phase calibration technology is very important. [0003] At present, the existing solution is mainly to solve the calibration of the digital array through the coupling...

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Problems solved by technology

[0003] At present, the existing solution is mainly to solve the calibration of the digital array through the coupling of the outer space, select the existing working channel to transmit, other channels to receive, and correct the transmission and reception of each channel through mutual transmission; the framework of this scheme Simple and low cost, but the calibration accuracy is not high, and it is difficult to improve, because it is easy to be interfered by space signals through space coupling, easily affected by the spatial distribution position of each vibrator, and easily affected by the difference in the amplitude and phase distribution of the vibrator itself sexual influence

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