A base-band signal can be up-converted using A. Sine wave B.

a-base-band-signal-can-be-up-converted-using-a-sine-wave-b

A base-band signal can be up-converted using

A. Sine wave

B. Cosine wave

C. Filtering

D. None of the mentioned

The question was asked in a national level competition.

My question is from Signals topic in section Signals and Spectra of Digital Communications

The correct answer is B. Cosine wave

For explanation: A base-band signal can be up-converted to band-pass filter by applying cosine wave.