A Dynamic Adjustment Method of Automatic Gain Control AGC

Abstract

The invention discloses a dynamic adjustment method of AGC (Auto Gain Control), and can solve the technical problem of amplitude limiting of sampling signals due to the fact that the input signal power of ADC is too high and beyond the conversion range itself and the technical problem of subsequent digital signal precision loss due to the fact that the signal power is too low. According to the dynamic adjustment method of AGC in the invention, energy detection of burst signals is carried out by adoption of an exponential smoothing filtering algorithm; furthermore, AGC rapid adjustment and slowadjustment algorithms are separately adopted in different time windows; rapid convergence and normal smooth of the reception level are ensured; and subsequent digital demodulation is easily carried out. Dynamic adjustment of AGC is carried out by adoption of the method; the adjustment speed is rapid; the steady-state error is low; the dynamic range is large; the receiving sensitivity of a groundstation can be effectively improved; and thus, the flight radius of an unmanned aerial vehicle is increased.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a dynamic adjustment method of automatic gain control (AGC). Background technique [0002] TDD communication technology can flexibly set uplink and downlink conversion time, so it is often used to realize asymmetric uplink and downlink business bandwidth, while uplink and downlink work in the same frequency band, which can greatly save spectrum resources. In the application scenario of military UAV and ground communication, the encrypted working frequency band is often used, and the spectrum resources are very tight. At the same time, the uplink of the ground station sends fewer remote control commands, and the downlink receives a large amount of images and status information. , so it is more suitable to adopt TDD technology to realize air-to-ground long-distance wireless communication. [0003] When the UAV and the ground station use TDD technology to communicate, the ch...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome existing technical deficiencies, provide a kind of dynamic adjustment method of automatic gain control AGC, can solve that the input signal power of ADC (Analog Digital Converter, analog-to-digital converter) is too large, has exceeded its conversion range, It will lead to the limitation of the sampling signal; if the signal power is too small, it will lead to the technical problem of loss of accuracy of the subsequent digital signal

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