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Antenna calibration method and system

An antenna calibration and antenna technology, applied in diversity/multi-antenna systems, baseband system components, space transmit diversity and other directions, which can solve problems such as inaccurate calibration factors and inability to accurately calibrate antennas.

Active Publication Date: 2013-02-13
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide an antenna calibration method and system to solve the problem that the calibration factor obtained in the existing calibration method is inaccurate and the antenna cannot be calibrated accurately

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  • Antenna calibration method and system
  • Antenna calibration method and system

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Embodiment Construction

[0067] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0068] The present invention conducts multiple channel estimations within one calibration period, then screens out effective vectors from the results of multiple channel estimations, and then calculates the calibration factor based on the effective vectors, thereby making the calculated calibration factors more accurate and improving the efficiency of antenna calibration. accuracy and reliability.

[0069] refer to figure 1 , shows a flow chart of an antenna calibration method according to Embodiment 1 of the present invention. During the antenna calibration process, the most important thing is the process of calculating the calibration factor, and the accuracy of the calibration factor determines the accuracy of the antenna calib...

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Abstract

The invention provides an antenna calibration method and system, which aim at solving the problem that calibration factors obtained by the conventional calibration method are inaccurate and cannot be used for accurately calibrating antennas. The method comprises the following steps of: performing N times of channel estimation on each antenna in an antenna array within one antenna calibration period, thus obtaining vectors Rk reflecting the amplitudes and phase characteristics of the antennas and obtained by the channel estimation procedures; aimed at an antenna k, sequentially judging whether vector pairs formed by vectors RKi obtained from the i times of channel estimation and vectors RKj obtained from the j times of channel estimation meet preset conditions; counting the number of the vector pairs meeting the preset conditions; determining the effective vector of the antenna k according to the number of the vector pairs meeting the preset conditions; and calculating the calibration factor of the antenna k according to the effective vector, and calibrating the antenna k according to the calibration factor. The method disclosed by the invention can guarantee that the calculated calibration factors are more accurate, and improve the accuracy and reliability of antenna calibration.

Description

technical field [0001] The present invention relates to the technical field of communications, in particular to an antenna calibration method and system. Background technique [0002] Smart antennas are time division (Tim e Di v i s i o n, one of the key technologies of the TD) system, relying on smart antennas to achieve beamforming can effectively reduce the interference between users. The main process of beamforming is: the uplink reception judges the incoming wave direction of the terminal through the phase relationship of each antenna, Downlink is shaped according to the incoming wave direction. [0003] Due to its own hardware reasons and external factors such as temperature, the phase and amplitude of each channel of the smart antenna system are deviated. Therefore, in order to effectively realize the function of the smart antenna, it is necessary to periodically calibrate the antenna array to compensate the phase and amplitude deviation between the working chan...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04L25/02
Inventor 刘杨
Owner DATANG MOBILE COMM EQUIP CO LTD
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