Question

Which of the following is the process of ‘aliasing’?

(a) Peaks overlapping

(b) Phase overlapping

(c) Amplitude overlapping

(d) Spectral overlapping

The question was asked in exam.

I would like to ask this question from Sampling in chapter Sampling Theorem of Signals and Systems

Answer 1

Correct option is (d) Spectral overlapping

Best explanation: Aliasing is defined as the phenomenon in which a high frequency component in the frequency spectrum of the signal takes the identity of a lower frequency component in the spectrum of the sampled signal.

Aliasing can occur if either of the following condition exists:

• The signal is not band-limited to a finite range.

• The sampling rate is too low.