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Communication Systems

Q1: An angle modulated signal is given by s(t) = cos 2p (2 x 106t + 30 sin 150t + 40 cos 150t). The maximum frequency and phase deviations of s(t) are

A 10.5 kHz, 140p rad

B 6 kHz and 80p rad

C 10.5 kHz, 100p rad

D 7.5 kHz, 100p rad

ANS:D - 7.5 kHz, 100p rad

s(t) = cos 2p(2 x 10+16t + 30 sin 150t + 40 cos 150t) Phase deviation = 100 p Frequency deviation = 7.5 kHz.



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