Reference no: EM132595019
Question 1 Do the following problem with x(t)=Acos(Πt/τ)/Π(t/2τ).
Sketch and label Φ(t) and f(t) for PM and FM when x(t) = A^(t/τ). Take Φ(-∞) = 0 in the FM case.
Question 2: Consider a tone-modulated FM or PM wave with fm = 10 kHz, β = 2.0, Ac = 100, and fc = 30 kHz. (a) Write an expression for f(t). (b) Draw the line spectrum
Question 3: Do the following problem with W=5 kHz.
A message has W = 15 kHz. Estimate the FM transmission bandwidth fΔ = 0.1, 0.5, 1, 5, 10, 50, 100, and 500 kHz.
Question 4:
A video signal with W = 5 MHz is to be transmitted via FM with fΔ, = 25 MHz. Find the minimum carrier frequency consistent with fractional bandwidth considerations. Compare your results with transmission via DSB amplitude modulation.
Question 5:
An FM system with fΔ, = 30 kHz has been designed for W = 10 Id-h. Approximately what percentage of BT is occupied when the modulating signal is a unit-amplitude tone at fm = 0.1, 1.0, or 5.0 kHz?
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