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A method and device for adjusting automatic gain control step size

A technology of automatic gain control and step size adjustment, which is applied in the field of communication, can solve problems affecting the performance of the communication system, and achieve the effect of improving performance

Active Publication Date: 2020-11-17
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method and device for adjusting the step size of automatic gain control, which solves the problem in the prior art that the performance of the communication system is seriously affected in high-order situations when the automatic gain control adjusts the strength of the signal

Method used

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  • A method and device for adjusting automatic gain control step size
  • A method and device for adjusting automatic gain control step size
  • A method and device for adjusting automatic gain control step size

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Experimental program
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specific Embodiment 1

[0058] Specific embodiment one: assume that the communication system adopts 256QAM modulation mode

[0059] Step 1: The base station obtains the modulation mode adopted according to the current configuration of the system. At this time, the base station can know that the modulation mode adopted by the system is 256QAM.

[0060] Step 2: Adjust the step-up and step-down of the automatic gain control according to the modulation method. Since the modulation method used by the system is 256QAM, after automatic gain control adjustment, all constellation points of all symbols in a received subframe cannot exceed the upper limit of its own decision area. The boost energy is min(20log10(2 / 1), 20log10(4 / 3), 20log10(6 / 5), 20log10(8 / 7), 20log10(10 / 9), 20log10(12 / 11), 20log10(14 / 13)) = 0.64dB; after automatic gain control adjustment, all symbols in a receiving subframe All constellation points cannot exceed the lower limit of its own judgment area. The reduced energy is min(20log10(3 / 2),...

specific Embodiment approach 2

[0062] Specific implementation mode two: assume that the communication system adopts 64QAM modulation mode

[0063] Step 1: The base station obtains the modulation mode adopted according to the current configuration of the system. At this time, the base station can know that the modulation mode adopted by the system is 64QAM.

[0064] Step 2: Adjust the step-up and step-down of the automatic gain control according to the modulation method. Since the modulation method adopted by the system is 64QAM, after automatic gain control adjustment, all constellation points of all symbols in a received subframe cannot exceed the upper limit of its own decision area. The boost energy is min(20log10(2 / 1), 20log10(4 / 3), 20log10(6 / 5))=1.58dB; after the automatic gain control is adjusted, all constellation points of all symbols in a received subframe cannot exceed the lower limit of its own decision area, and the reduced energy is min(20log10(3 / 2), 20log10(5 / 4 ), 20log10(7 / 6))=1.34dB. Then...

specific Embodiment approach 3

[0066] Specific implementation mode three: assume that the communication system adopts 16QAM modulation mode

[0067] Step 1: The base station obtains the modulation mode adopted according to the current configuration of the system. At this time, the base station can learn that the modulation mode adopted by the system is 16QAM.

[0068] Step 2: Adjust the step-up and step-down of the automatic gain control according to the modulation method. Since the modulation method adopted by the system is 16QAM, after automatic gain control adjustment, all constellation points of all symbols in a received subframe cannot exceed the upper limit of the self-judgment area, and the boost energy is 20log10(2 / 1)=6.02dB; after automatic gain control adjustment, one All constellation points of all symbols of the received subframe cannot exceed the lower limit of its own decision area, and the reduced energy is 20log10(3 / 2)=3.52dB. Then it can be known that the increase step size of the automat...

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Abstract

Disclosed are a method and apparatus for adjusting an automatic gain-controlled step length, and a computer storage medium, which relate to communication technologies. The method comprises: obtaining, according to current configuration of a system, an automatic gain-controlled modulation mode; obtaining, according to the obtained modulation mode, automatic gain-controlled adjusted step length; and adjusting, according to the obtained adjusted step length, strength of an input signal.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for adjusting the step size of automatic gain control. Background technique [0002] Automatic Gain Control (AGC) is an automatic control method that automatically adjusts the gain of the amplifier circuit with the signal strength. Automatic gain control is a kind of limiting output, which uses the effective combination of linear amplification and compression amplification to adjust the output signal of the circuit. When a weak signal is input, the linear amplifying circuit works to ensure the strength of the output signal; when the input signal reaches a certain strength, the compression amplifying circuit is started to reduce the output amplitude. The automatic gain control function can automatically control the magnitude of the gain by changing the input and output compression ratio. [0003] When the existing automatic gain control adjusts the str...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03G3/20
CPCH04W52/52
Inventor 吴昊
Owner ZTE CORP