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Automatic gain control method and device

A technology of automatic gain control and receiving gain, which is applied in the field of communication, can solve problems such as in-band signal amplitude distortion and reduce the receiving performance of Bluetooth devices, and achieve good receiving sensitivity and anti-interference performance

Active Publication Date: 2018-01-30
ACTIONS ZHUHAI TECH CO
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Problems solved by technology

[0005] The embodiment of the present invention provides an automatic gain control method and device, which are used to solve the problem that the existing automatic gain control method may cause distortion of the in-band signal amplitude and reduce the receiving performance of the Bluetooth device

Method used

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  • Automatic gain control method and device

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Embodiment 1

[0122] Embodiment 1. The structure of the bluetooth device applied in this embodiment is as follows Figure 4 As shown, it includes a radio frequency (RF) module 410, a digital demodulator 420, and an AGC module 430, wherein the radio frequency module 410 includes an antenna, an amplifier, a mixer, an analog filter, a variable gain controller, and an analog-to-digital converter . Before automatic gain control is performed, the second corresponding relationship and the first corresponding relationship shown in Table 1 and Table 2 are configured first. The processing procedure of this embodiment is as follows Figure 5 shown, including:

[0123] S501. Configure an initial receiving gain, and initialize to a lower nonlinear region.

[0124] Specifically, when AGC is enabled, that is, after the AGC function is turned on, the RF module gain value is configured as the G6 gear, and the state of the actual power of the data frame received by the RF module is divided into "lower non...

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Abstract

The invention discloses an automatic gain control method and device, which are used for resolving the problem that the conventional automatic gain control method may lead to in-band amplitude distortion and greatly reduce the function of a Bluetooth device. The method comprises the steps of measuring the RSSI value of a data frame; determining whether the actual power of the data frame is within alinear zone of curve relationship between the actual power and the measuring power or not based on the RSSI value of the data frame; adjusting the receiving gain of the data frame based on the judging result. The invention is advantageous in that the device can work at the best gain point, and the receiving sensitivity and anti-interference performance can be bettered.

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] The radio frequency (Radio Frequency, RF for short) transceiver in the Bluetooth device is the core of the Bluetooth device, and it is different from a common wireless transceiver used for broadcasting in that it is small in size and low in power. The main functions of the radio frequency transceiver are modulation / demodulation, frame timing recovery and frequency hopping, and complete the operation of sending and receiving at the same time. [0003] The signal energy received by the RF transceiver of the Bluetooth device, on the one hand, varies greatly due to the power and distance of the opposite transmitter. On the other hand, due to the different interference signal energies existing in the channel, the signal energy received by the radio frequency transceiver also has a large variation range....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03G3/30H04B1/40H04B5/02H04B5/48
Inventor 郑思彭洪胡世飞
Owner ACTIONS ZHUHAI TECH CO
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