Apparatus and method for correcting TDD intelligent antenna system

Abstract

The invention discloses a correction method and a device of a time division duplex intelligent antenna system, the method comprises that: the initialization of a channel is carried out; the channel correction of the system is started, the correction of a power detection channel and a detection receiving channel is carried out according to the gains of the power detection channel and the detectionreceiving channel which are obtained under the current working point and the temperature; the gain calibration and the amplitude-phase consistency calibration of an uplink channel are carried out simultaneously at the protection time slot according to the real-time obtained gain of the detection receiving channel and a gain inequality of the detection channel and the detection receiving channel; the gain calibration and the amplitude-phase consistency calibration of a down transmit channel are carried out simultaneously at the downlink pilot time slot according to the obtained target weight value of the downlink transmit channel and the ganged gain regulating quantity of the downlink transmit channel. The invention can effectively solve the key correction problem in the intelligent antenna system, realize the corrections of the gain accuracy and the amplitude-phase consistency errors of the array channel, simplify the algorithm and have the high correction precision.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for correcting a time division duplex smart antenna system. Background technique [0002] The smart antenna system is based on a multi-antenna system, which controls the direction of the antenna beam by weighting the amplitude and phase of the signals received and transmitted by the array channel to achieve directional transmission and reception for desired users. Therefore, it is required that the channels that make up the multi-antenna system have consistent amplitude and phase characteristics. However, the transmission characteristics of each channel in the actual multi-antenna system are inconsistent, so the calibration of the smart antenna system is a key technology of the smart antenna system and a prerequisite for realizing the smart antenna technology. [0003] Among the most commonly used calibration methods in the existing TDD smart antenna s...

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Problems solved by technology

[0007] In view of the above analysis, the present invention aims to provide a channel gain calibration and amplitude-phase consistency correction that is completed at the same time through one correction, with faster speed, better performance, lower complexity, and little impact on system performance. A correction method for a time-division duplex smart antenna system to solve the problems of inaccurate correction, separation of gain calibration and channel amplitude-phase consistency correction in existing related technologies

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