Calibration method and device for an antenna array

Abstract

A method and device for calibrating an antenna array, comprising: when a first target antenna of the antenna array transmits a signal and a second target antenna receives a signal, the calibration of each transmitting channel in the first target antenna and each receiving channel in the second target antenna is calculated Compensation value, after channel compensation, the amplitude-phase response of each transmitting channel in the first target antenna is consistent and the amplitude-phase response of each receiving channel in the second target antenna is consistent; when the second target antenna transmits a signal and the first target antenna receives a signal, Calculate the calibration compensation values ​​of each transmit channel in the second target antenna and each receive channel in the first target antenna. After channel compensation, the amplitude-phase response of each transmit channel in the second target antenna is consistent and the amplitude-phase response of each receive channel in the first target antenna is consistent. The amplitude and phase responses are consistent. In the embodiment of the present invention, antenna dummy elements or radio frequency coupling devices are added to the antenna array to make the amplitude-phase responses of all antenna transmission channels consistent and the amplitude-phase responses of the receiving channels also consistent, thereby achieving consistent calibration of the antenna array.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a method and device for calibrating an antenna array. Background technique [0002] With the rapid increase of communication traffic, the requirements for communication system throughput are getting higher and higher. In wireless communication systems, Massive Multiple Input Multiple Output (Massive MIMO) and beamforming are important technical means to improve system throughput, and the prerequisite for effective beamforming is the antenna array and transceiver channel to calibrate. Antenna calibration includes consistency calibration and reciprocity calibration. The goal of consistency calibration is that the amplitude and phase characteristics of all receiving channels are the same and the amplitude and phase characteristics of all transmitting channels are also the same; the goal of reciprocity calibration is the same transmitting and receiving channels. Th...

AI Technical Summary

Problems solved by technology

However, the above-mentioned traditional air interface coupling calibration method can only calibrate the reciprocity of the antenna array and the radio frequency channel, but cannot calibrate the consistency of the antenna array. Forming has a greater impact, and at the same time brings a certain loss to the transmission power of the signal

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