Sampling (signal processing) - Wikipedia
https://en.wikipedia.org/wiki/Sampling_(signal_processing)
OverviewTheoryPractical considerationsApplicationsUndersamplingOversamplingComplex sampling See alsoFunctions of space, time, or any other dimension can be sampled, and similarly in two or more dimensions. For functions that vary with time, let S(t) be a continuous function (or "signal") to be sampled, and let sampling be performed by measuring the value of the continuous function every T seconds, which is called the sampling interval or sampling period. Then the sampled function is given by t…
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