Digital Automatic Gain Control (DAGC) for Surveillance Radar Applications: Theory and Simulation

The potential for using a digital automatic gain control (DAGC) is examined. The DAGC operates by digitally storing a clutter map of the average of past returns. This average clutter map is digitally filtered to remove small spatial variations and the resulting values are used to adjust the front end receiver gain. In contrast a traditional analog automatic gain control (AAGC) uses real time filtered feedback to control the adjustable front end …