Combined multi-antenna calibration device for group delay and nonlinear distortion

A non-linear distortion and antenna calibration technology, applied in transmitter monitoring, receiver monitoring, etc., to achieve the effect of solving group delay distortion

Inactive Publication Date: 2019-11-08
西安宇飞电子技术有限公司
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to provide a joint multi-antenna calibration device for grou

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  • Combined multi-antenna calibration device for group delay and nonlinear distortion
  • Combined multi-antenna calibration device for group delay and nonlinear distortion
  • Combined multi-antenna calibration device for group delay and nonlinear distortion

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[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0023] As an embodiment of the present invention, a joint multi-antenna calibration device for group delay and nonlinear distortion includes multiple antenna calibration channels, a multi-antenna coupler, and a digital processor. The antenna calibration channels include sequentially connected antennas. Antenna, IF filter DAC, RF channel, power amplifier PA and antenna filter, the antenna filter output ends of multiple antenna calibration ...

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Abstract

The invention discloses a combined multi-antenna calibration device for group delay and nonlinear distortion. The device comprises a plurality of antenna calibration channels, a multi-antenna couplerand a digital processor. The antenna calibration channel comprises an antenna, an intermediate frequency filter DAC, an RF channel, a power amplifier PA and an antenna filter which are connected in sequence. The output ends of the antenna filters of the plurality of antenna calibration channels are connected to the input ends of the multi-antenna coupler. The output end of the multi-antenna coupler is connected to the digital processor through the calibration receiving channel and the analog-to-digital converter ADC in sequence. The digital processor is used for calculating and updating multi-antenna calibration coefficients. According to the invention, the problem of multi-antenna calibration is solved, the problems of group delay distortion of a transmitting channel analog filter and nonlinear distortion of a power amplifier can be solved. The two kinds of distortion can be simultaneously solved through one algorithm device.

Description

technical field [0001] The invention relates to an antenna calibration device, in particular to a joint multi-antenna calibration device for group delay and nonlinear distortion. Background technique [0002] The current time division duplex (Time Division Duplexing, TDD) communication system requires two sets of circuits at the radio frequency (RF) end of each antenna to realize the sending and receiving functions. It is difficult to ensure the circuit consistency between channels due to the phase and impedance changes of the circuit breaker. The characteristic response of each radio frequency circuit also changes with changes in the external environment such as operating frequency, time, temperature and humidity. In order to eliminate the influence of the deviation between each radio frequency receiving and transmitting channel on the channel and ensure the reciprocity of the radio frequency channel, it is necessary to use the calibration technology of the radio frequency...

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Application Information

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IPC IPC(8): H04B17/21H04B17/11H04B17/12
CPCH04B17/11H04B17/12H04B17/21
Inventor 熊军王湛兴王长友景晓康
Owner 西安宇飞电子技术有限公司
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