Digital filters are mathematical algorithms used to process digital signals, allowing for the modification of their frequency components. They can be used to enhance, suppress, or alter signal characteristics and are crucial in various applications, especially in the field of biomedical signal processing. Understanding their definition involves recognizing their types—such as finite impulse response (FIR) and infinite impulse response (IIR)—and their operational properties, which depend heavily on their region of convergence.
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