摘要
分析数字接收机的主要问题是A/D转换器的过载问题,从AGC的基本原理和实现方法出发,阐述在数字AGC中,信号经A/D转换器数字化后,增益衰减主要是通过采集数据的运算处理来完成。结果证明,数字AGC具有控制平坦、建立时间快、电路结构简单和成本低、电路性能能达到较高的动态范围等特点。
Automatic Gain Control(AGC) is an important technology in digital shortwave receiver.This thesis is based on the basic theory and realization of AGC.In digital receiver,we pay more attention to the overload of A/D converter.In our digital AGC module.analogical signal is converted to digital signal by A/D converter,and then the control of gain is realized by the operation of sampled digital data.By the result of experiment,the digital AGC designed by this method,which is characteristic of flat controlled res...
出处
《舰船电子工程》
2008年第8期71-72,76,共3页
Ship Electronic Engineering
关键词
自动增益控制(AGC)
短波通信
短波数字接收机
数字下变频器
automatic gain control（AGC）
short-wave communication
HF digital receiver
programmable digital downconverter-PDC
