Band-limited signal sampling frequency

1. What is the minimum sampling frequency for a band-limited signal?
2. What is band-limited frequency?
3. What should be the ideal sampling rate of a band-limited continuous time signal?
4. What is the Nyquist criteria for band-limited signal?

What is the minimum sampling frequency for a band-limited signal?

The Nyquist sampling theorem says that a band-limited signal can be recovered from evenly-spaced samples. If the highest frequency component of the signal is f_c then the function needs to be sampled at a frequency of at least the Nyquist frequency 2f_c.

What is band-limited frequency?

A signal is said to be band-limited if the amplitude of its spectrum goes to zero for all frequencies beyond some threshold called the cutoff frequency.

What should be the ideal sampling rate of a band-limited continuous time signal?

A band-limited signal of finite energy with no frequency components higher than W Hz may be completely recovered from a knowledge of its samples taken at the rate of 2 W samples/sec. This is also known as the uniform sampling theorem.

What is the Nyquist criteria for band-limited signal?

Thus, the minimum sampling frequency necessary for sampling without aliasing is 2BW. This result is generally known as the Nyquist criterion.