EC > GATE 2026 > Narrowband Signals
Consider a real, narrowband signal x(t) = A(t)cos[2πfct + θ(t)] where the maximum frequency components of A(t) and θ(t) are fM and fc (= 1000 fM), respectively.
Which of the following statements is/are correct for −∞ < t < ∞?
A
x(t) represents a PSK modulated signal for suitable choices of A(t) and θ(t).
B
x(t) represents an amplitude modulated signal for suitable choices of A(t) and θ(t).
C
x(t) represents a band-limited Gaussian noise process.
D
x(t) never represents a narrowband FM signal.

Correct :

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