A receiver automatic gain control method and system

An automatic gain control and gain control technology, applied in transmission systems, electrical components, etc., can solve the problems of signal instability, limited range and influence of radio frequency signal automatic gain control, and achieve the effect of ensuring linearity and improving the range of automatic gain control

Active Publication Date: 2018-11-09
HUNAN KEAYSHARE COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] These methods mainly include two types, one is to add an attenuator at the front end of the receiver link, but if only one attenuator is added, the automatic gain control range of the radio frequency signal is very limited, and it is not suitable for long-distance data transmission. transmission
[0005] The other is to add two or more stages of attenuators. This method can expand the range of automatic gain control. However, since the single-chip microcomputer cannot control the multi-stage attenuators at the same time, it is easy to cause adverse effects on the signals of the links of all levels of the entire receiver. stable impact

Method used

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  • A receiver automatic gain control method and system
  • A receiver automatic gain control method and system
  • A receiver automatic gain control method and system

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Embodiment 1

[0038] The present invention provides a receiver automatic gain control method, see figure 1 as shown, figure 1 A flow chart of the process of a receiver automatic gain control method provided by the present invention; the method includes:

[0039] Step s101: respectively collect the signals output by the attenuation units in the various links of the receiver;

[0040] Step s102: Perform detection processing and analog-to-digital conversion processing on the signals collected in the links at all levels, and send the processed signals in the links at all levels to FPGA (Field-Programmable Gate Array, Field Programmable Gate Array )control unit;

[0041] Step s103: The FPGA control unit obtains the attenuation control signals corresponding to the links of each level according to the processed signals in the links of each level and the preset gain control table, and sends the attenuation control signals corresponding to the links of each level in parallel To the attenuation un...

Embodiment 2

[0045] The present invention also provides another receiver automatic gain control method, see figure 2 as shown, figure 2A flow chart of the process of another receiver automatic gain control method provided by the present invention; the method includes:

[0046] Step s201: Before the signals in the links of each level are input to the attenuation units in the links of each level, filter the signals respectively;

[0047] Wherein, the receiver here may be a receiver using double frequency conversion, and in this case, links of various levels of the receiver are a radio frequency link, a high-medium frequency link, and a low-medium frequency link.

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Abstract

The invention discloses an automatic gain control method for a receiver, which comprises collecting signals output by attenuation units in links of various levels of the receiver respectively; performing detection processing and analog-to-digital conversion processing on the signals collected in links of various levels respectively , and send the processed signals in the links at all levels to the FPGA control unit respectively; the FPGA control unit obtains the attenuation control signals corresponding to the links at all levels respectively according to the processed signals in the links at all levels and the preset gain control table, And the attenuation control signals corresponding to the links of each level are respectively sent in parallel to the attenuation units in the links of each level; the attenuation units in the links of each level respectively perform gain control processing on the signals input to the attenuation unit according to the attenuation control signals. The method can parallelly control the attenuation units in the links at all levels, and the control confusion of the links at all levels will not occur; and the automatic gain control range of the signal in the receiver is greatly improved. The invention also discloses a receiver automatic gain control system.

Description

technical field [0001] The invention relates to the field of automatic gain control, in particular to a receiver automatic gain control method. The invention also relates to a receiver automatic gain control system. Background technique [0002] Due to the higher and higher requirements for the communication rate and wider channel bandwidth, the linearity requirements for the receiver channel are also higher and higher. Therefore, certain requirements are put forward for the receiver link, and the receiver (such as The receiver using double frequency conversion) can automatically control the gain, so that the power output of the radio frequency signal can be kept within a stable range, so as to achieve the purpose of maintaining the maximum signal-to-noise ratio of the radio frequency signal. And for the receiver, if the receiver and the transmitter can realize normal communication at various distances, the receiver itself is required to have a very large gain control range...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/12
CPCH04B1/123
Inventor 王德刚李尚立
Owner HUNAN KEAYSHARE COMM TECH CO LTD
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