An automatic gain control adjustment system and method with signal strength detection

Abstract

The invention discloses an automatic gain control regulation system with a signal strength detection function, and particularly regulates to an automatic gain control regulation device. The system comprises an antenna, a receiving module and an automatic gain control module, wherein the antenna is coupled to the receiving module; the automatic gain control module is provided with a digital input end, an analogue input end and a regulation signal output end; the signal output end of a power detection module is connected with the analogue input end; the signal output end of a signal processing module is connected with the digital input end; the automatic gain control module comprises a controller, a comparison unit and a storage unit; the controller is used for comparing an output signal of the comparison unit with a reference difference value stored in the storage unit, and outputting a regulation signal to the receiving module to regulate the gain of the receiving module through the regulation signal output end. According to the system, the analogue signal strength and digital signal strength of the receiving module of a transceiver are compared to judge whether interference exists or not, so that a basis is provided for the gain regulation of an amplification unit in the receiving module.

Description

technical field [0001] The invention relates to the technical field of electronic communication, in particular to an automatic gain control adjustment system. Background technique [0002] With the development of 3GPP (3rd Generation Partnership Project, 3rd Generation Partnership Project), the coexistence of different communication systems has become more and more prominent. At the same time, with the needs of consumers and the advancement of manufacturing technology, the circuit parts of mobile terminals (such as mobile phones, notebooks, etc.) are becoming smaller and thinner, and wireless transmission (including voice and data transmission) has become an indispensable part of various mobile terminals function. The interference between various terminals increases greatly. At the same time, on the one hand, due to the omission of the surface acoustic wave filter (surface acoustic wave filter), the ability to suppress out-of-band interference signals is weakened. On the o...

AI Technical Summary

Problems solved by technology

The interference between various terminals is greatly increased. At the same time, on the one hand, due to the omission of the surface acoustic wave filter (surface acoustic wave filter), the ability to suppress out-of-band interference signals is weakened.

On the other hand, due to the strengthening of the integrated design of analog and digital, part of the analog filter function of the RF analog chip is integrated into the digital baseband chip, resulting in the weakening of the ability of the analog part to suppress out-of-band interference signals, while the ability of the digital filter to suppress out-of-band Maintain or may increase; out-of-band interference may saturate the analog part, resulting in a decline in the RSSI (Received Signal Strength Indicator, received signal strength indicator) of the digital part; the existing AGC (Automatic Gain Control, automatic gain control) adjustment strategy challenged

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