基于FPGA的一种通信设备大动态范围AGC实现方法

Implementation Method Based on FGPA of Communication Equipment Large Dynamic Range AGC

自动增益控制(AGC)系统广泛应用于通信和雷达接收机,接收机动态范围60dB或者更大时,需要选用大动态范围的AGC系统来保证或者扩大该指标。本文介绍了AGC系统的组成,给出了一种通信设备中使用大动态范围的数字AGC的设计流程和组成,并给出了基于FPGA技术的具体实现方法,通过对接收数据的采样和处理,可以看出该方法可实时有效实现大动态范围增益调整。

Automatic gain control(AGC)system is widely used in communication and radar receivers.When the dynamic range is wider more than 60dB,it is necessary to select AGC system with wide dynamic range to ensure or expand the index.This paper introduces the composition of the AGC system,a design flow and composition of digital AGC with large dynamic range in communication equipment are presented,and the implementation method based on FPAG is also provided.By sampling and processing the received data,this method can achieve wide dynamic range gain adjustment in real time and effectively.