Aliasing and the Sampling Theorem
Discover how the sampling theorem acts as a fundamental limit on the sample rate beyond which distortion in the signal is unavoidable.
We'll cover the following...
We have learned that spectral aliases arise after sampling at integer multiples of the sample rate . An example of this is shown in the figure below:
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We’ll now look at the sampling theorem, which puts a fundamental limit on the sample rate for signal representation in discrete time.
Background
How should we choose the sample rate ?
- We know that a closer time spacing, i.e., a smaller , produces a better approximation of the signal in discrete time and pushes the spectral aliases further away due to the large