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Large-scale MIMO (Multiple Input Multiple Output) antenna array far field calibration system

An antenna array and calibration system technology, applied in diversity/multi-antenna systems, radio transmission systems, transmission systems, etc., to achieve the effects of avoiding mutual interference, improving calibration efficiency, and improving calibration accuracy

Inactive Publication Date: 2018-06-12
10TH RES INST OF CETC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For antenna arrays with hybrid beamforming, since the number of RF / analog front-ends is smaller than the number of antenna array elements, traditional digital baseband calibration methods cannot be directly used in such antenna arrays

Method used

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  • Large-scale MIMO (Multiple Input Multiple Output) antenna array far field calibration system
  • Large-scale MIMO (Multiple Input Multiple Output) antenna array far field calibration system
  • Large-scale MIMO (Multiple Input Multiple Output) antenna array far field calibration system

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Embodiment Construction

[0023] refer to figure 1 . In the embodiment described below, a large-scale MIMO antenna array far-field calibration system includes: a servo control device electrically connected to a computer, a phased array wave control device, and a data transmission and acquisition device. Machine interface programming controls the servo control device, phased array wave control device, data transmission and acquisition device, the servo control device controls the relative position between the antenna array under test and the beacon antenna, and changes the beam from the transmitting beacon antenna to the receiving antenna array under test The angle of incidence or the beam departure angle from the measured transmitting antenna array to the receiving beacon antenna, the phased array wave control device controls the antenna elements in the sub-array, and only selects a single element in the sub-array for calibration each time. All the phase shifters, attenuators, switches and digital wei...

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Abstract

The invention discloses a large-scale MIMO (Multiple Input Multiple Output) antenna array far field calibration system. The calibration accuracy of a wave beam direction error caused by an array element position error and an amplitude phase error in an antenna array under test can be effectively increased by the calibration system. The calibration system is implemented by the following technical scheme: a server control device controls the relative position between the antenna array under test and a beacon antenna, and changes a wave beam incident angle from a transmitting beacon antenna to areceiving antenna array under test or a wave beam departure angle from a transmitting antenna array under test to a receiving beacon antenna; a phased array wave control device controls all phase shifters, attenuators, switches and digital weighting of a feed network of the antenna array under test; a data transmitting and acquiring device controls digital signals transmitted by the transmitting antenna array under test and the transmitting beacon antenna, and acquires digital signals received by the receiving antenna array under test and the receiving beacon antenna; and the array element positioning error and the amplitude phase error of the antenna array under test are calculated on the basis of a digital domain signal processing algorithm, and a calibration result of the antenna arrayunder test is output.

Description

technical field [0001] The invention relates to a calibration system for a smart antenna array, in particular to a calibration system for a millimeter-wave large-scale multi-antenna transmission and multi-antenna reception (multiple-input multiple-output, MIMO) antenna array using hybrid beamforming. Background technique [0002] The use of multiple-antenna transmission and multiple-antenna reception (multiple-input multiple-output, MIMO) technology is the basic way to mine wireless space dimension resources and improve spectrum efficiency and power efficiency. It has been one of the mainstream technologies in the research and development of mobile communication for nearly 20 years one. MIMO technology can provide diversity gain, multiplexing gain and power gain. Diversity gain can improve system reliability, multiplexing gain can support single-user spatial multiplexing and multi-user space multiplexing, and power gain can improve system power efficiency through beamformin...

Claims

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Application Information

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IPC IPC(8): H04B17/12H04B7/06H04B7/0413
CPCH04B7/0413H04B7/0617H04B17/12
Inventor 张海涛卢建川吴世奇
Owner 10TH RES INST OF CETC
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