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Communication Systems

Q1:

In phase shift keying the input signal is

A st(t) = A cos ω0t and s2(t) = - A cos ω0t

B s1(t) = s2(t) = A cos ω0t

C s1(t) = A cos ω0t and s2(t) = A cos (ω0t + p/2)

D s1(t) = A cos ω0t and s2(t) = - A (cos ω0t + p/2)

ANS:A - st(t) = A cos ω0t and s2(t) = - A cos ω0t

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