Howtosignalprocessing
- How does sampling rate affect aliasing?
- What happens when sampling rate is too high?
- What is the effect if aliasing happened on a sampled signal?
- What will happen when sampling rate is greater than Nyquist rate?
How does sampling rate affect aliasing?
Aliasing occurs because signal frequencies can overlap if the sampling frequency is too low. Frequencies "fold" around half the sampling frequency - which is why this frequency is often referred to as the folding frequency.
What happens when sampling rate is too high?
If the rate of samples is too high the system may not be able to process them fast enough - it runs out of processing time.
What is the effect if aliasing happened on a sampled signal?
In signal processing and related disciplines, aliasing is an effect that causes different signals to become indistinguishable (or aliases of one another) when sampled.
What will happen when sampling rate is greater than Nyquist rate?
It is the critical rate of sampling. If the signal xt is sampled above the Nyquist rate, the original signal can be recovered, and if it is sampled below the Nyquist rate, the signal cannot be recovered.
