AGC

This repository contains an implementation of a digital AGC (Automatic Gain Control) using MATLAB and VHDL. The AGC is implemented based on the following resource: https://wirelesspi.com/how-automatic-gain-control-agc-works/

How to build

1. Open Vivado –> Launch the Xilinx Vivado software.
   
2. Access the TCL Console –> Locate the TCL console at the bottom of the Vivado interface.
   
3. Navigate to the Build Folder –> Use the cd command to move to the project's build directory.
   
4. Run the Build Command –> Execute the following command in the TCL console:

cd ./FPGA/build
source vivado_build2.tcl 

Test Bench verification

A test bench file is included in the project. You can run it to verify the functionality. The following image demonstrates the AGC's operation, where an input signal ranging from -2000 to 2000 is scaled down to an output range of -200 to 200:

The AGC's target power level is defined by the targetLevel parameter, which is implemented as a fixed-point number with:

• 16-bit integer part

• 0-bit fractional part (pure integer representation)

In this implementation, the targetLevel is set to hex(200) (which corresponds to 512 in decimal).

targetLevel = 0x200  # 512 in decimal, no fractional bits  

Simulation

The project includes a MATLAB simulation file located in the matlab folder. You can run this file to analyze the AGC's behavior and verify its performance.