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An all-digital beamforming array and a method for realizing automatic amplitude and phase calibration of transceiver channels

A beamforming, transceiver channel technology, applied in the field of calibration of microwave and millimeter wave communication systems, can solve problems such as differences in calibration methods, and achieve the effects of short calibration time, simplified calibration hardware circuit, and low hardware cost

Active Publication Date: 2022-07-29
SOUTHEAST UNIV
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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

Method used

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  • An all-digital beamforming array and a method for realizing automatic amplitude and phase calibration of transceiver channels
  • An all-digital beamforming array and a method for realizing automatic amplitude and phase calibration of transceiver channels
  • An all-digital beamforming array and a method for realizing automatic amplitude and phase calibration of transceiver channels

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Embodiment Construction

[0075] The technical solutions of the present invention will be further introduced below with reference to the specific embodiments and the accompanying drawings.

[0076] This specific embodiment discloses an automatic calibration method for the amplitude and phase of the transceiver channel of an all-digital beamforming array, such as figure 1 shown. 1 represents the antenna unit, the unit is in the form of a rectangular patch, each unit has the same structure and is arranged in an array at equal intervals, and the entire array is arranged on a printed circuit board. The antenna structure is symmetrical, and the entire array structure is a repeated arrangement of the unit structure. 2 indicates a coupled transmission line, which is in the form of a microstrip transmission line, which is also printed on the printed circuit board and is spaced from the antenna array at a certain distance. Through spatial electromagnetic coupling, the energy radiated by each antenna element c...

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Abstract

The invention discloses an all-digital beam forming array and a method for realizing automatic calibration of the amplitude and phase of a transceiver channel. A transmission line is embedded on the aperture surface of the antenna array, and both ends of the transmission line are connected with calibration transceiver channels; At the same time, record the signal amplitude and phase values ​​sampled by the two calibration receiving channels, and calculate the amplitude and phase difference of all transmitting channels relative to the reference channel; during receiving calibration, all receiving channels of the system are in working state, and both sides are excited successively. To calibrate the transmit channel, record the calibration signal amplitude and phase values ​​sampled by all receive channels, and infer the amplitude and phase difference of all receive channels relative to the reference channel. The method for automatic calibration of transmitting and receiving channels of an all-digital beamforming array provided by the present invention has no limitation of space and manpower, reduces the introduction of a large number of directional couplers in hardware, and is suitable for self-calibration of a large-scale all-digital beamforming 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 realizing automatic calibration of amplitude and phase of transmitting and receiving channels. 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 1,000-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, millimeter wave (mm-Wave), and Massive MIMO will be adopted. Among them, the full beamforming system can realize beamforming, multi-beam and downlink data precoding conveniently and quickly in the digital domain, reducing the use of analog phase shifters, so it is the most direct and effective system ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06H04B7/08H04B17/12H04B17/21
CPCH04B7/0617H04B7/084H04B7/086H04B7/0868H04B17/12H04B17/21
Inventor 洪伟郭翀田玲
Owner SOUTHEAST UNIV
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