What is aliasing and how can it be prevented What are the th

What is aliasing and how can it be prevented? What are the three steps for converting an analog signal into a digital signal? Given the following signals and spectra, determine the minimum sampling frequency

Solution

1) Aliasing is the effect, in which, two signals will overlap and will produce a different signal from the original one, when it is reconstructed back.

It can be prevented by taking sampling frequency Fs > maximum frequency of analog signal 2Fm.

Fs can also be equal to 2Fm

2) Three steps for converting analog signal to digital are ..

Take Fs>2Fm

Sampling time Ts=1/Fs

Replace t=nTs

3) Minimum sampling frequency Fs=2Fm=2(300)=600MHz

Fs=2Fm=2(3)=6kHz