Method and device for realizing automatic gain control (AGC)

A technology of automatic gain control and implementation method, applied in the field of communication, can solve the problems of AGC value jumping up and down, saturation, etc., to achieve the effect of optimizing reception performance and avoiding AGC value instability

Active Publication Date: 2012-08-15
SANECHIPS TECH CO LTD
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Problems solved by technology

[0006] The present invention proposes a method and device for realizing automatic gain control to solve the pro

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  • Method and device for realizing automatic gain control (AGC)
  • Method and device for realizing automatic gain control (AGC)
  • Method and device for realizing automatic gain control (AGC)

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[0042] Hereinafter, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other arbitrarily if there is no conflict.

[0043] The basic idea of ​​the present invention is to determine the correct AGC value by judging whether the downlink signal is a burst signal, and use the correct AGC value to control the gain amplification.

[0044] Specifically, after the mobile terminal receives the downlink signal, it determines whether the received downlink signal is a burst signal. If it is, the last correct AGC value is used to control the gain amplifier device for gain amplification when the next cycle arrives. If not, , The AGC value calculated this time is taken as the correct AGC value, which is used to control the gain amplifier device for gain amplification when the next cycle arrives.

[0045] Among them, ...

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Abstract

The invention discloses a method and a device for realizing automatic gain control (AGC). The method comprises the steps that after a mobile terminal receives a downlink signal, whether the received downlink signal is a burst signal or not is judged, if so, a latest correct automatic gain control value is used for controlling a gain amplification device to amplify gain when a next cycle comes, and if not, an automatic gain control value which is obtained through calculation is used as a correct automatic gain control value, and is used for controlling the gain amplification device to amplify the gain when the next cycle comes. By judging the burst signal to determine the proper automatic gain control value, the situation that the AGC value is unstable caused by the burst signal is avoided and the receiving performance of a mobile terminal receiver is optimized.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and device for realizing automatic gain control. Background technique [0002] Since the amplitude of the signal received by the mobile terminal changes greatly, and there are characteristics such as rapid signal fading, the mobile terminal receiver will have an AGC (Automatic Gain Control, automatic gain control) system. The main function of this system is to make the mobile terminal change greatly. The input signal, after the automatic gain control, the signal reaching the ADC (analog-to-digital converter) is basically stable around a target value, so as to ensure that the digital signal converted by the ADC will not have too small resolution or saturation, so as to ensure that the digital receiver performance. [0003] Such as figure 1 As shown, the automatic gain control system usually consists of a low noise amplifier, a mixer, a variable gain controller and an automatic...

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Application Information

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IPC IPC(8): H04W52/52H03G3/20
Inventor 卢兴建
Owner SANECHIPS TECH CO LTD
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