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Beamforming calibration system and method

A beamforming and calibration system technology, applied in transmission systems, radio transmission systems, diversity/multi-antenna systems, etc., can solve problems such as the reduction of the ability of millimeter wave communication systems to send and receive signals to penetrate obstacles

Inactive Publication Date: 2019-06-11
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, due to the use of high-frequency electromagnetic wave signals, the ability of sending and receiving signals to penetrate obstacles in the millimeter wave communication system is relatively reduced, and oxygen and water vapor in the air will also absorb millimeter wave energy

Method used

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  • Beamforming calibration system and method
  • Beamforming calibration system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment M1

[0047] Embodiment M1: the multiple phase combinations provided by the computing device 30 include all available phase combinations of the multiple transmit antennas 104_1 - 104_N. That is, the computing device 30 exhaustively exhausts all possible phase combinations, and tries 2 phase combinations for each antenna B possible phases, the search space for computing device 30 to find the optimal solution is (2 B ) N . The embodiment M1 is suitable for the transmitter 10 with a small scale, the number of transmitting antennas is small, or the phase options that can be set by the phase rotators 103_1 - 103_N are small.

Embodiment M2

[0048] Embodiment M2: the calculation device 30 obtains initial phase combinations corresponding to multiple transmit antennas, and the multiple phase combinations provided by the calculation device 30 only include phase combinations adjacent to the initial phase combination, and this initial phase combination may be stored in the receiver 20 or computing device 30 . The search space as described in embodiment M1 may be too large for most transmitters 10, so embodiment M2 does not try for every antenna2 B Instead, we can try only the phases near the initial phase combination (for example, the best phase obtained last time). For example, after the beamforming calibration system 1 performs a beamforming calibration, the best solution found this time can be stored in the receiver 20, and when the beamforming calibration is to be performed next time, the computing device 30 can first obtain the previous best solution. The best solution is the initial phase combination this time. ...

Embodiment M3

[0053] Embodiment M3: When the computing device 30 determines the locally optimal phase combination of the first group, the multiple phase combinations provided by the computing device 30 include all available phase combinations of the transmitting antennas of the first group. The search space for computing device 30 to find the optimal solution is (2 B ) Q ×P.

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Abstract

The present invention provides a beamforming calibration system and method. The beamforming calibration system includes a transmitter, a receiver, and a computing device. The computing device providesmultiple phase sets to the transmitter. When the computing device provides a first phase set among the phase sets to the transmitter: the transmitter uses the first phase set to set phases of the transmitting antennas, the receiver receives wireless transmission signal from the transmitting antennas to obtain a first radiation pattern corresponding to the first phase set, and the computing deviceis configured to compare the first radiation pattern with a predetermined pattern to calculate a pattern similarity score corresponding to the first phase set. The computing device selects a calibration phase set among the phase sets according to the pattern similarity score of each phase set, and provides the calibration phase set to the transmitter to calibrate beamforming.

Description

technical field [0001] The present invention relates to wireless signal transmission using multiple antennas, and in particular to a beamforming calibration system and method. Background technique [0002] Compared with the third generation (3G) or fourth generation (4G) communication system commonly used today, the millimeter wave (MillimeterWave, mmWave for short) communication system uses a relatively high-frequency frequency band for communication. Since the strength of the electromagnetic wave energy received by the receiver is inversely proportional to the square of the signal transmission distance and proportional to the wavelength of the electromagnetic wave signal, the millimeter wave communication system increases the attenuation of signal energy by using short-wavelength high-frequency signals. Furthermore, due to the use of high-frequency electromagnetic wave signals, the ability of transmitting and receiving signals to penetrate obstacles in the millimeter wave ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06
CPCH04B7/0617H04B17/12H04B17/318
Inventor 温朝凯王昶仁陈荣杰
Owner IND TECH RES INST