A matched filter is a signal processing technique used to maximize the signal-to-noise ratio (SNR) when detecting a known signal in the presence of noise. It is particularly useful in situations where the signal is embedded in a noisy environment, such as in radar, communications, and image processing. ### Key Concepts 1. **Purpose**: The primary purpose of a matched filter is to identify the presence of a specific signal shape (or template) within a received noisy signal.
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