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Automatic gain control method and device for array antenna base station of time-division duplex system

An automatic gain control, time division duplex system technology, applied in gain control, amplification control, diversity/multi-antenna systems, etc., can solve the problem of reducing the transceiver performance of base stations, affecting the implementation of smart antenna algorithms, and cannot guarantee the spatial characteristics of the array received signals And other issues

Inactive Publication Date: 2008-07-30
ZTE CORP
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an automatic gain control method and device for a time-division duplex system array antenna base station, which solves the problem that the existing technology cannot guarantee the spatial characteristics of the array received signal, which affects the realization of the smart antenna algorithm and reduces the transceiver performance of the base station And other issues

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  • Automatic gain control method and device for array antenna base station of time-division duplex system
  • Automatic gain control method and device for array antenna base station of time-division duplex system
  • Automatic gain control method and device for array antenna base station of time-division duplex system

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Embodiment Construction

[0027] The specific implementation of the present invention will be described below by taking the TD-SCDMA system as an example.

[0028] figure 1 It is a flow chart of steps of the inventive method; the present invention comprises the following steps:

[0029] Step 100, the VGA control function is completed by the digital down-conversion chip and the numerically controlled attenuator in the receiving branch, to ensure that when the signal input by the antenna port changes in a large range, the A / D input to the receiving branch The signal amplitude of the converter is kept within an appropriate range to avoid saturation overflow;

[0030] Step 200, the digital down-conversion chip completes the down-conversion and amplitude recovery of the input data, so that the baseband digital signal has a wider bit width, and bypasses the automatic gain control function of the digital down-conversion chip itself;

[0031]Step 300, the digital signal processing chip on the channel board c...

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Abstract

A method for controlling automatic gain of array antenna base station in time division duplex system includes using digital bottom frequency chip ( DBFC ) in receiving branch and digital controlled attenuator to control variable gain amplifier, using DBFC to restore input digital signal and by - passing automatic gain control function of DBFC itself, using digital signal processing chip on channel board to finalize synchronous control of array channel automatic gain control to ensure dynamic state of signal and bit wide of data for decreasing load of following signal process, carrying out automatic gain control of each receiving branch in synchronization to keep original character of array signal.

Description

technical field [0001] The invention relates to a mobile base station system using an intelligent antenna, in particular to an automatic gain control method and device for a base station using an intelligent antenna in a time division duplex system. Background technique [0002] Smart antenna is a hot technology in the field of communication in recent years. Among the three major standards of third-generation mobile communication technology that have been adopted, the TD-SCDMA (Time Division Synchronous Code Division Multiple Access) standard submitted by my country clearly includes smart As one of the necessary technologies to improve system capacity and coverage, the antenna adopts a frame format that is particularly conducive to the use of smart antenna technology. At the same time, WCDMA (Wideband Code Division Multiple Access) and CDMA2000 (Qualcomm's Code Division Multiple Access standard) provide convenience for the application of smart antenna technology (such as auxi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/30H03G3/20H01Q21/00H04B7/02H04W88/08
Inventor 康凤岐卢勤博邵显成曾召华
Owner ZTE CORP
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