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Antenna calibration method and device

An antenna calibration and antenna technology, applied in the field of communication, can solve the problems of high complexity and low calibration accuracy

Active Publication Date: 2018-09-14
COMBA TELECOM SYST CHINA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present application provides a method and device for antenna calibration, which are used to solve the problem of low calibration accuracy and high complexity in the calculation of calibration coefficients by estimation algorithms in the prior art, and improve the antenna calibration accuracy

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  • Antenna calibration method and device
  • Antenna calibration method and device

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Embodiment Construction

[0044] In the embodiment of this application, such as figure 1 As shown, the base station may be a distributed base station, including a base band unit (Base bandUnit, BBU) and a radio remote unit (Radio Remote Unit, RRU). The remote radio unit may be a multi-channel remote radio unit. Each receiving radio frequency channel of the multi-channel receiving end generates a response when receiving the radio frequency response, thereby receiving the radio frequency response signal generated by the radio frequency channel. The transmitting end of the base station has N transmitting antennas X 1 ~X N1 , X N1+1 ~X N , the radio frequency response of the downlink channel of the transmitting end where each antenna of the base station is located is T, the radio frequency response of the uplink channel of the receiving end is R, and the user equipment has L receiving antennas Y 1 ~Y L1 , Y L1+1 ~Y L . The radio frequency response of the downlink channel of the transmitting end of...

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Abstract

The application discloses an antenna calibration method and device. The method comprises the following steps: a base station acquires a first downlink calibration signal returned by a coupler of a reference antenna of the base station; the base station acquires a first uplink calibration signal from an uplink reference channel of the reference antenna through the coupler; the base station determines a calibration coefficient of the reference antenna according to a specific value of the acquired first downlink calibration signal and the acquired first uplink calibration signal; the base stationacquires a second downlink calibration signal through a to-be-calibrated antenna; the base station acquires a second uplink calibration signal sent by the to-be-calibrated antenna; the base station determines a calibration coefficient of the to-be-calibrated antenna according to a specific value of the second downlink calibration signal and the second uplink calibration signal, and the calibration coefficient of the reference antenna; and the base station compensates the radio frequency response of an uplink channel or a downlink channel of the to-be-calibrated antenna.

Description

technical field [0001] The present application relates to the technical field of communications, and in particular to a method and device for antenna calibration. Background technique [0002] The massive multiple-input multiple-output antenna system (Multiple-Input Multiple-Output, MIMO) transmission technology using multi-antenna transmission and multi-antenna reception is one of the mainstream technologies that utilize spatial dimension resources and improve spectrum efficiency and energy efficiency. [0003] In large-scale MIMO antenna systems, such as distributed base stations, TDD will become the main communication method. The base station can use the channel reciprocity to design the downlink joint precoding, and estimate the radio frequency response of the downlink channel according to the estimated channel state information of the uplink channel. [0004] However, in an actual large-scale MIMO antenna system, the complete communication channel includes not only the...

Claims

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Application Information

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IPC IPC(8): H04B7/0413H04B7/0456H04B17/11H04B17/21H04L25/02
CPCH04B7/0413H04B7/0456H04B17/11H04B17/21H04L25/0224H04B7/04H04B17/12H04B17/309H04L25/022
Inventor 姜成玉刘重军刁穗东付杰尉
Owner COMBA TELECOM SYST CHINA LTD