Matched filtering

Matched filtering is a technique used to detect signals that may be hidden in noise. Imagine you're trying to find a particular song playing in a crowded room. A matched filter acts like your brain, focusing on the specific sounds of that song while ignoring others. In a technical context, it involves comparing a known pattern (the song) to a complex signal (the noise) to identify its presence and improve the clarity of the desired information. This method is widely used in various fields, including radar, telecommunications, and medical imaging, to enhance signal detection and analysis.