Nyquist–Shannon Sampling Theorem
A signal containing no frequency above B hertz is completely determined by samples taken at a rate greater than 2B; sampling multiplies the signal by an impulse train, which replicates its spectrum at every multiple of the sample rate, and the replicas stay separable only above the Nyquist rate.
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A signal containing no frequency above B hertz is completely determined by samples taken at a rate greater than 2B; sampling multiplies the signal by an impulse train, which replicates its spectrum at every multiple of the sample rate, and the replicas stay separable only above the Nyquist rate.
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