Device and method for carrying out synchronous calibration on multiple receiving/transmitting channels of active antenna

Abstract

Disclosed is a method for synchronously calibrating a multi-transmitting / receiving channel of an active antenna, comprising: testing the amplitude and phase difference of a calibration tool, creating a calibration environment corresponding to each transmitting / receiving channel between a transmitting / receiving radio frequency module and a calibration device; a digital processing module collecting and storing off-line amplitude and phase information about each transmitting / receiving channel; according to the amplitude and phase difference of the calibration tool and the stored off-line amplitude and phase information about each transmitting / receiving channel, performing amplitude and phase compensation on each transmitting / receiving channel; and performing constant amplitude and constant phase verification on each transmitting / receiving channel after the amplitude and phase compensation, and performing transmitting / receiving beamforming if the verification is qualified. Also disclosed at the same time is a device for synchronously calibrating a multi-transmitting / receiving channel of an active antenna. The method and the device can be applied to achieve the synchronous calibration of each transmitting / receiving channel under the condition that no hardware module is additionally added onto an active antenna system, and effectively reduce the cost, the volume and the power consumption of the active antenna system.

Description

Technical field [0001] The invention relates to the field of mobile communication, and in particular to a device and method for synchronous calibration of multiple transmitting and receiving channels of an active antenna. Background technique [0002] In the existing mobile communication system, each cell usually uses the antenna installed on the top of the tower to transmit and receive signals, and use the radio remote unit (RRU) to provide the antenna with high-power transmission signals through the feeder, and use the feeder to receive the antenna The received signal is sent to the RRU for further processing. Beamforming based on this architecture is completed in an antenna, which is usually a passive antenna, and the amplitude and phase difference required for beamforming are usually completed by an internal antenna feed network and a phase shift network. It is worth mentioning that the phase shifting network is realized by a mechanical structure driven by a motor, which is ...

AI Technical Summary

Problems solved by technology

[0004] The current active antenna calibration method is usually implemented by adding a transceiver calibration module to the antenna system, for example: the patent number is CN 101651480A, and the invention name is "active antenna, base station, method of refreshing amplitude and phase, and signal processing method" patent, which adds a special transceiver calibration channel and coupler to the antenna system to complete the calibration of the receiver and transmitter channels, making the structure of the entire antenna system complex and expensive

Of course, there are other calibration methods in the prior art, such as the patent No. CN 101916919A, the patent titled "A Method for Calibrating Active Antennas and Active Antennas". The external noise on the frequency band is used to calibrate the receiving channel. Although the method saves a special calibration device, the calibration feasibility is difficult and is not conducive to mass production; in addition, the transmitter calibration in the calibration method adds a special reflection point device, which also increases the cost

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