Correlation of two signals at different sample rate

1. How do you calculate the correlation between two signals?
2. What happens if the signals sample less than Nyquist rate?
3. How does sampling rate affect the signals?
4. What happens when the sampling rate is less than 2 Hz?

How do you calculate the correlation between two signals?

In words, we compute a correlation by multiplying two signals together and then summing the product. The result is a single number that indicates the similarity between the signals x[n] and y[n].

What happens if the signals sample less than Nyquist rate?

When the sampling frequency drops below the Nyquist rate, the frequencies will crossover and cause aliasing.

How does sampling rate affect the signals?

Sampling rate determines the sound frequency range (corresponding to pitch) which can be represented in the digital waveform. The range of frequencies represented in a waveform is often called its bandwidth.

What happens when the sampling rate is less than 2 Hz?

When the sampling rate is not large enough (not larger than 2B Hz), then interference among adjacent bands will occur, and this results in the phenomenon of aliasing. In this case, the original signal cannot be recovered from the sampled signal.