All-digital beam forming array and method for realizing automatic calibration of amplitude and phase of transceiving channel

Abstract

The invention discloses an all-digital beam forming array and a method for realizing automatic calibration of amplitude and phase of a transceiving channel, a transmission line is embedded in the aperture surface of an antenna array, and calibration transceiving channels are connected to two ends of the transmission line; during emission calibration, each emission channel is excited in sequence, signal amplitudes and phase values sampled by the two calibration receiving channels are recorded at the same time, and amplitudes and phase differences of all the emission channels relative to the reference channel are calculated; during receiving calibration, all receiving channels of the system are in a working state, calibration transmitting channels on the two sides are successively excited, calibration signal amplitudes and phase values obtained by sampling of all the receiving channels are recorded, and amplitudes and phase differences of all the receiving channels relative to a reference channel can be deduced. According to the automatic calibration method for the receiving and transmitting channels of the all-digital beam forming array, limitation of sites and manpower is avoided,introduction of a large number of directional couplers is reduced on hardware, and the automatic calibration method is suitable for self-calibration of the large-scale all-digital beam forming array.

Description

technical field [0001] The invention belongs to the technical field of calibration of microwave and millimeter wave communication systems, and in particular relates to an all-digital beamforming array and a method for automatically calibrating the amplitude and phase of a transceiver channel. Background technique [0002] After the evolution of 2G, 3G, and 4G eras, mobile communication technology will gradually enter the 5G era. Compared with 4G technology, 5G hopes to achieve a 1000-fold increase in network capacity, while achieving a data transmission delay of less than 1ms. In order to achieve the above goals, key technologies such as Ultra-densification, mm-Wave, and Massive MIMO will be adopted. Among them, the full digital beamforming system is the most direct and effective system solution to realize massive MIMO because it can conveniently and quickly realize beamforming, multi-beam and downlink data precoding in the digital domain, reducing the use of analog phase s...

AI Technical Summary

Problems solved by technology

Since the all-digital beamforming system does not require channel combining, its calibration method is slightly different from that of the phased array system

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