数字通信系统中新型自动增益控制方法设计

Design of a Novel Automatic Gain Control Method for Digital Communication System

设计了一个新型的自动增益控制(Automatic Gain Control,AGC)方法。针对某数字通信系统的需求,所设计的AGC可以充分利用ADC量化位数,并能够处理LTE多种传输模式(TM2和TM3)信号。仿真结果表明,本AGC能够同时适用于TM2和TM3信号,能够在充分利用ADC量化位数的同时避免过饱和现象,能够准确判断输入信号功率变化状态并迅速调整,从而对稳定功率的输入信号给出恒定的增益。

A novel automatic gain control(AGC) method is designed.Aiming at satisfying the requirement of some certain digital communication system,the digitaMzing bits of ADC can be fully utilized with the designed AGC,and it is able to handle with several transmission modes of LTE(such as TM2 and TM3) signal.It is shown from simulation results that by utilizing the proposed AGC,LTE TM2 and TM3 signal can be well handled,the digitaMzing bits of ADC can get fully utilized while avoiding the oversaturation phenomenon,the power status of input signal can be estimated accurately and the gain can be adjusted rapidly,by this means,for input signal with stable power,constant gain can be generated by the proposed AGC.