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Digital self-adaptive AGC control method and system

A control method and control system technology, applied in the field of digital adaptive AGC control method and system, can solve problems such as heavy debugging workload and long response time, and achieve the effects of improving production efficiency, improving response speed, and reducing production costs

Inactive Publication Date: 2021-03-12
SICHUAN JIUZHOU ELECTRIC GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned technical problems of large debugging workload and long response time of the existing AGC control method, the present invention provides a digital self-adaptive AGC control method and system, which can reduce AGC debugging workload and shorten AGC response time, and realize radio frequency Large Dynamic Real-time Precise Automatic Control of Link Gain

Method used

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  • Digital self-adaptive AGC control method and system
  • Digital self-adaptive AGC control method and system

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Embodiment 1

[0033] The present invention realizes through following technical scheme:

[0034] A digital adaptive AGC control method, comprising the following steps:

[0035] Multi-level high-speed AD sampler is used to perform multi-level AD sampling on the analog signal of the radio frequency channel;

[0036] Serial-to-parallel conversion and data synchronization processing of the AD sampling signal through the controller;

[0037] The controller uses a fast approximation algorithm to unenvelope the synchronized AD signal;

[0038] Convert the envelope obtained from the AD signal into a logarithm;

[0039] Compare the amplitude of the AD signal according to the logarithm converted from the envelope, determine the control strategy and issue a control command to the actuator;

[0040] The executor executes the control instruction after receiving the control instruction to control the radio frequency channel.

[0041] Taking the FPGA as the controller and the high-speed programmable a...

Embodiment 2

[0051] A digital self-adaptive AGC control system, to realize the mode described in embodiment 1, including AD sampler, controller and executor;

[0052] The AD sampler is a multi-stage AD sampler, which is used to collect the AD signal of the radio frequency channel;

[0053] The controller is used to analyze the AD signal to obtain the envelope, compare the multi-level sampling envelope according to the characteristics of the radio frequency link, and determine the control strategy and issue a control instruction to the actuator;

[0054] The executor is used for executing the control instruction issued by the controller.

[0055] Specifically, the multi-stage AD sampler is a high-speed AD sampler.

[0056] Specifically, the controller is one of FPGA, DSP, and MCU.

[0057]Specifically, the actuator is one of a program-controlled attenuator, an electronically adjustable attenuator, and a voltage-controlled amplifier.

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Abstract

The invention relates to the technical field of radio frequency control, in particular to a digital self-adaptive AGC control method. According to the technical scheme, the digital self-adaptive AGC control method comprises the following steps: performing multi-stage AD sampling on a radio frequency channel by adopting a multi-stage high-speed AD sampler; performing serial-parallel conversion anddata synchronization processing on AD sampling signals through a controller; de-enveloping the synchronized AD signals by the controller by using a fast approximation algorithm; converting an envelopeobtained by the AD signals into a logarithm; comparing the amplitudes of the AD signals according to the logarithm obtained through envelope conversion, and then determining a control strategy and sending a control instruction to an actuator; and the actuator receiving the control instruction and then executing the control instruction to control the radio frequency channel. According to the method, the dynamic range of output signals of the radio frequency channel can be compressed, so that the AGC debugging workload is reduced, the AGC response time is shortened, and the large-dynamic real-time accurate automatic control of the radio frequency link gain is realized.

Description

technical field [0001] The invention relates to the technical field of radio frequency control, in particular to a digital adaptive AGC control method and system. Background technique [0002] AGC is a closed-loop electronic circuit and a negative feedback system, which is divided into two parts: a gain-controlled amplifier circuit and a control voltage forming circuit; the gain-controlled amplifier circuit is located in the positive amplification path, and its gain changes with the control voltage; the control voltage forming circuit The basic components are the AGC detector and the low-pass smoothing filter. AGC is widely used in systems with a large dynamic range such as military radio stations, smart antennas, wireless communication systems, medical care, and disk reading channels. [0003] Traditional radio frequency link automatic gain control mostly uses negative feedback of analog devices to achieve AGC gain control. This method has disadvantages such as low control...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03G3/20
CPCH03G3/20
Inventor 汤茂林蒋千军吴逢章
Owner SICHUAN JIUZHOU ELECTRIC GROUP