Matched filter

A matched filter is a signal processing tool designed to detect a specific known pattern within a noisy signal. It works by correlating the incoming data with the expected signal shape, effectively highlighting moments when the pattern appears. This method maximizes the likelihood of correctly identifying the target signal even when it's faint or buried in noise, improving detection accuracy. Think of it as a highly tuned "search filter" that aligns with the shape of what you're looking for, making it easier to find the signal amid interference.