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Filter design
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<p>Filter design is the process of designing a <a href="/facts/Filter_(signal_processing)/vydJCNle">signal processing filter</a> that satisfies a set of requirements, some of which may be conflicting. The purpose is to find a realization of the filter that meets each of the requirements to an acceptable degree. </p><p>The filter design process can be described as an optimization problem. Certain parts of the design process can be automated, but an experienced designer may be needed to get a good result. </p><p>The design of digital filters is a complex topic. Although filters are easily understood and calculated, the practical challenges of their design and implementation are significant and are the subject of advanced research. </p>