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Antenna calibration method and device

An antenna calibration and one frequency point technology, applied in the field of communication, can solve problems such as errors

Active Publication Date: 2021-04-16
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This conventional calibration method only processes a single frequency point. In outdoor formal work scenarios or low signal-to-noise ratio scenarios, the frequency domain response result of a single frequency point will inevitably produce a huge error as the earliest calibration result.

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

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Embodiment Construction

[0037]The present application provides an antenna calibration method and apparatus to increase the accuracy of antenna calibration.

[0038]The core principle of traditional antenna calibration is:

[0039](1) Using the orthogonal sequence acquisition antenna calibration coefficient with a lower frequency

[0040]The effective signal bandwidth is divided into a plurality of standard physical resource blocks (such as long-term evolution, LONG TERM EVOLUTION, LTE) contains 100 PRBs, 5G 100MHz 30kHz subcarriers. However, 250 or 272 PRBs can be included). The subband division is then performed for each PRB; select a portion of the sub-band in each PRB sequentially assigned to the calibration antenna, retain a part of the signal bandwidth does not transmit, as a noise estimate.

[0041]In the post-calibration, the standard orthogonal sequence is transmitted, and the calibration antenna is unified, and the calibration information of the current PRB is determined by the channel estimate; for receiving...

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Abstract

The present application discloses an antenna calibration method and device, which are used to improve the accuracy of antenna calibration. An antenna calibration method provided in an embodiment of the present application includes: for each frequency point, determining the frequency domain calibration result of the antenna calibration of the frequency point, and determining the phase and amplitude corresponding to the frequency domain calibration result; The phase of the point is subjected to least square fitting and interpolation to finally determine the calibration phase factor of the subcarrier of each frequency point; after the phases of all frequency points are linearly fitted, the The phases of the subcarriers are interpolated according to the phases of two adjacent frequency points after the fitting.

Description

Technical field[0001]The present application relates to the field of communications, and more particularly to an antenna calibration (AC) method and device.Background technique[0002]In the prior art, between the large-scale antennas, due to the antenna production process, the calibration network that leads to a large-scale antenna is under existing processes, it is difficult to ensure that the signal-to-noise ratio of each antenna reaches the traditional 8-antenna calibration requirements. Noise ratio.[0003]The existing large-scale antenna calibration system is estimated that the frequency domain response of the transmitting and receiving RF channel is estimated, amplitude and phase compensation for the RF channel, the purpose is to ensure the frequency domain amplitude and phase of the transmitting and receiving radio frequency channels. It outputs the frequency domain calibration factor that receives the channel and the transmit channel. The antenna calibration system includes a r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/12H04B17/21
CPCH04B17/12H04B17/21
Inventor 李庆华倪立华章勇
Owner DATANG MOBILE COMM EQUIP CO LTD