Question 1: a. If the message
m(t)
(shown if Figure 1) is to be transmitted using a wirelss communication system. Sketch the AM modulated signal (label the message) and the FM modulated signal.
?
b. Define "ailisasing" and state two techniques that can be used to avoid it. c. Find the Nyquist rate and Nyquist interval of the following signals i.
,x(t)=sinc(400\pi t)
ii.
,y(t)=sinc^(2)(2.5\pi t)
iii.
,z(t)=cos(2000\pi t)+sin(6000\pi t)
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