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electronics and communication engineering communication systems
1. In phase shift keying the input signal is
(A): s1(t) = A cos ω0t and s2(t) = - A (cos ω0t + p /2)
(B): s1(t) = A cos ω0t and s2(t) = A cos (ω0t + p /2)
(C): s1(t) = s2(t) = A cos ω0t
(D): st(t) = A cos ω0t and s2(t) = - A cos ω0t
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