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Communication Systems

Q1:

An AM signal and a narrowband FM signal with identical carriers, modulating signals and modulation index of 0.1 are added together. The resultant signal can be closely approximated by

A Broadband FM

B SSB with carrier

C DSB-SC

D SSB without carrier

ANS:B - SSB with carrier

s(t)AM + s(t)NBFM = A1 sin ωct + A2 cos ωct + (A - B) m m(t) sin ωct it will not be NBFM because μ = 0.1, and SSB with carrier.



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