Visualizing aliasing in Matlab

1. How do you detect aliasing?
2. What is aliasing in Matlab?

How do you detect aliasing?

You can detect aliasing by running a horizontal test on your oscilloscope. If the shape of the waveform changes drastically, you may have aliasing. You can also perform a peak detect test and if the waveform still changes drastically, aliasing may be an issue.

What is aliasing in Matlab?

Aliasing is the distortion that occurs when overlapping copies of the signal's spectrum are added together. The more the signal's baseband spectral support exceeds 2 π / M radians, the more severe the aliasing. Demonstrate aliasing in a signal downsampled by two.