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Antenna calibration method and equipment

An antenna calibration and antenna technology, applied in the field of communication, can solve the problems that the reciprocity is not strictly established, the antenna calibration cannot be accurately realized, and the effect of accurate antenna calibration can be achieved.

Active Publication Date: 2011-12-21
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

[0016] The embodiment of the present invention provides an antenna calibration method and equipment, which solves the problem that in the existing technical solutions, the antenna calibration cannot be accurately realized when the uplink and downlink reciprocity is not strictly established.

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  • Antenna calibration method and equipment

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Embodiment Construction

[0046] As mentioned in the background, multi-antenna technology has become one of the key technologies of the next generation wireless communication system. The linear precoding / beamforming technology in multi-antenna technology is an effective means to combat fading channels, reduce error probability, and improve system performance .

[0047] The TDD system utilizes the reciprocity of the uplink and downlink channels, and the downlink channel information from the base station to the UE can be obtained according to the uplink channel information from the UE to the base station estimated by the base station, so as to calculate the precoding matrix / beamforming weight. However, the uplink and downlink reciprocity is not strictly established in the actual system, which affects the realization of inter-antenna alignment.

[0048] In order to overcome such defects, an embodiment of the present invention proposes an antenna calibration method, in which the terminal device performs co...

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Abstract

Disclosed are a method and device for calibrating an antenna. By applying a technical solution of embodiments of the present invention, a calibration pilot frequency is transmitted by a base station to a terminal device to allow the terminal device to perform, on the basis of the calibration pilot frequency, channel measurement and information feedback for calibrating the antenna. Through such processing, the terminal device is allowed to calibrate the antenna in coordination with the base station on the basis of a pilot frequency signal meeting a requirement of a multiple antenna scenario, and, under the premise of uplink-downlink reciprocity not being established strictly, is allowed to accurately calibrate the antenna.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to an antenna calibration method and equipment. Background technique [0002] A MIMO (Multiple-Input Multiple-Output) system refers to a system in which multiple antennas are installed at both the transmitting end and the receiving end. The MIMO system adds space domain processing on the basis of traditional time-frequency processing, and can further obtain array processing gain and diversity gain. In a MIMO system, if the transmitter can know the channel information in a certain way, the transmitted signal can be optimized according to the channel characteristics, so as to improve the receiving quality and reduce the complexity requirement of the receiver. Linear precoding / beamforming technology is one of the optimization methods, which is an effective means to combat fading channels, reduce error probability, and improve system performance. [0003] In the multi-a...

Claims

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Application Information

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IPC IPC(8): H04B17/00H04B7/04
CPCH04B7/04H04B17/0067H04B17/0007H04B17/12H04B17/24
Inventor 高秋彬彭莹孙韶辉
Owner DATANG MOBILE COMM EQUIP CO LTD
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