A signal with a bandwidth of 1.2 kHz must be sampled.
a. What is the Nyquist rate of the signal?
Nyquist Rate = 2*(bandwidth) or Nyquist Rate (Fnr) = 2*(freq max)
Fnr = 2*(1.2 khz) = 2.4khz
b. What is the minimum sampling frequency needed to avoid aliasing?
Fn => Fnr
Fn => 2.4khz (2400 hz)
c. Unbeknownst to us, the signal is contaminated with noise at a 20-kHz rate. What happens to this noise when sampled at the frequency specified in part (b)?