GATE 2019: Communication Live Practice Quiz (App update required to attempt this test)

Given below is spectrum of AM signal find the power efficiency of AM signal given carrier signal frequency is 200 rad/sec.

The efficiency of AM is __________

Periodic signal shown below angle modulates a very high frequency carrier (sinusoidal). The modulated signal is given as X_(t) = A_c cos[2π × 10⁶t + K_p m(t)] and m(t) is given as :

The frequency deviation from maximum to minimum is 20 KHz.  The value of Kp in the above expression is

Given below is figure of Indirect FM transmitter. Find the maximum frequency duration Δf and carrier frequency fc at the output of transmitter.

Given f₁ = 200 KHz,     f_LO = 10.8 MHz,

Δ f₁ = 25 Hz,     n₁ = 64 and n₂ = 48,   f_LO < f₂

For a LTI system shown below

The input random process X(τ) is R_X(τ) = , given ; ∝, β are constant, u(τ) is unit step function. The PSD of output process y(t),  will be

for the system shown in figure :

The input x(t) has mean of 1, the output mean of the system will be ______.

Consider a signal having pdf as

The signal is quantized to 256 levels the SN_qR (signal to quantization noise) by sampled signal is ______ dB

Two independent random variables X and Y have PDF as

And given that z = 2x + y,

Find the probability that z > 2