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Automatic gain control method and device

An automatic gain control and gain adjustment technology, applied in the field of communication, can solve the problem of long AGC adjustment time, and achieve the effect of rapid adjustment and reduction of adjustment times.

Active Publication Date: 2014-11-19
SHENZHEN NAT ENG LAB OF DIGITAL TELEVISION
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Problems solved by technology

[0004] In the prior art, when the received signal changes greatly, the AGC changes the gain of the amplifier according to the preset adjustment gain, that is, the fixed step adjustment method is used. When the gain of the amplifier needs to be greatly changed, the AGC needs to perform multiple times. Adjustment, so that the adjustment time of AGC is very long

Method used

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  • Automatic gain control method and device

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Embodiment Construction

[0013] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0014] Embodiments of the present invention provide a signal processing method and device. The details are described below respectively.

[0015] see figure 1 , a schematic diagram of an embodiment of an automatic gain control method in an embodiment of the present invention, including:

[0016] 101. Demodulate the radio frequency signal to the baseband, and obtain the output signal after the gain of the amplifier and the analog-to-digital conversion;

[0017] T...

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Abstract

The embodiment of the invention discloses an automatic gain control method and a device, which are applied to the technical field of communication. The automatic gain control method comprises an automatic gain control (AGC) process which comprises acquiring average energy of an output signal of a pre-module and calculating regulation gain according to the average energy and preset reference energy, wherein the pre-module comprises an amplifier, and the regulation gain is used for regulating the gain of the amplifier. The automatic gain control method, provided by the embodiment of the invention, can be used for quickly regulating the gain of the amplifier.

Description

technical field [0001] The invention relates to the technical field of communications, in particular to an automatic gain control method and device. Background technique [0002] Burst communication is a widely used communication method. For example, the common time division multiple access signal in mobile communication and satellite communication adopts burst transmission mode. [0003] In the prior art, the communication device is in a waiting state when it is idle, and is detecting a burst signal. When it detects the arrival of data, the communication device will transfer to the data transmission and processing process. The signal received by the communication device varies widely. The difference between the strongest and the weakest signal may be tens of decibels, which is not conducive to the work of analog-to-digital conversion. Therefore, automatic gain control (AGC, Automatic Gain Control) is used to adjust the amplification gain of the amplifier, and the received s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03G3/20
Inventor 王长龙唐焰陈燕生赵宝龙
Owner SHENZHEN NAT ENG LAB OF DIGITAL TELEVISION
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