基于FPGA实现的中频数字相干AGC的设计方法

自动增益控制(AGC)电路在大动态中频接收机中具有重要作用,提出一种基于FPGA实现的中频数字相干AGC设计方法,讨论了数字相干AGC模块的实现原理,并对该模块进行了仿真,给出了仿真结果和在实际工程中应用该模块的情况;提出的中频数字相干AGC设计方法比传统的模拟AGC设计方法对信号幅度的控制精度更高,并且全部在数字域实现,设计方法简便,实时性高,可用性强。

Design Method of Digital IF Coherent AGC Based on FPGA

Automatic gain control circuit is very important in IF receiver with large dynamic range. A de- sign method of digital IF coherent AGC based on FPGA and the principle of this method are introduced in this thesis. This paper gives the simulation result of this method. It can be used for engineering applica- tion. The method of digital IF coherent AGC controls amplitude of signal is more accurately than tradition method. It is carried out in digital domain. This design is simple and easy with strong real time characterist and usability.