Device and method for realizing output power control of power amplifier

A technology of power amplifier and output power, which is applied in the field of devices that realize power amplifier output power control, to achieve the effect of avoiding communication network quality and preventing damage

Active Publication Date: 2012-05-30
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the abnormality of the output power feedback voltage of the power amplifier (the feedback value is lower than the expected power for a long time) cannot be effectively detected, so that the power amplifier cannot be prevented from working in a saturated state

Method used

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  • Device and method for realizing output power control of power amplifier
  • Device and method for realizing output power control of power amplifier
  • Device and method for realizing output power control of power amplifier

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Embodiment Construction

[0042] The technical solutions of the present invention will be described in more detail below in conjunction with the accompanying drawings and preferred embodiments. Although the GSM base station system is used as an example below, it should be clear that this is only for illustration and explanation of the present invention, and does not constitute a limitation to the technical solution of the present invention.

[0043] Such as figure 2 Shown is the structure of an embodiment of the power amplifier output power control device of the present invention, including a peak detector 1 at the input end of the power amplifier and a peak detector 2 at the output end, an AD converter, a power control module, and a digitally controlled attenuator, wherein:

[0044] The peak detector 1 is used to detect the output signal power of the power amplifier, and output the output power detection voltage to the AD converter;

[0045] The peak detector 2 is used to detect the input signal pow...

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Abstract

The invention discloses a device and method for realizing output power control of a power amplifier. The device is characterized in that: a peak value detector 1 and a peak value detector 2 respectively detect an output signal power and an input signal power of the power amplifier; the corresponding output and input power detection voltages are output to an AD (Analogue-to-Digital) converter together; the AD converter converts the output and input power detection voltages into the corresponding output and input power values and transmits the corresponding output and input power values to a power control module; and the power control module obtains an input signal power threshold value under the corresponding power grade according to expected powers under various power grades of a power amplifier and the output and input power values, and controls an output power of the power amplifier in the known power amplifier state. The device and the method provided by the invention effectively prevent a transmitter from being in a saturated status or an over-power status, so as to avoid abnormalities, such as transmission index deterioration of a base station, occurrences of over-cover or over-area cover, and the like.

Description

technical field [0001] The present invention relates to a power amplifier device and a method for controlling its output power, in particular to a device and method for controlling the output power of a power amplifier in a base station transmitter. Background technique [0002] In the field of wireless communication, the base station transmitter of the Global System of Mobile Communication (GSM, Global System of Mobilecommunication) generally adopts the closed-loop power control method, and its principle block diagram is as follows: figure 1 As shown, the output power of the base station is obtained through the peak voltage detection circuit at the output of the power amplifier (referred to as the power amplifier), and the obtained output power value is compared with the expected power. The comparison result is used to update the calibration value of the power control, and the calibration value is used to control The digitally controlled attenuator at the front end of the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/20H03G3/20H04W88/08
CPCH03G3/3042
Inventor 郭启俊
Owner ZTE CORP
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