Signal Processing - Study Mode
[#106] A causal LTI system is described by the difference equation 2y[n] = αy[n - 2] - 2x[n] + βx[n - 1] The system is stable only if
Correct Answer
(C) |α| < 2, any value of β
[#107] The spectral density of a random signal is given by π[δ(ω - ω 0 ) + δ(ω + ω 0 )]. The auto-correlation function of the signals is
Correct Answer
(A) cos ω 0 τ
[#108] In a discrete-time Low Pass Filter, the frequency response is
Correct Answer
(C) Periodic with period 2π
[#109] A discrete time system y(n) is the resultant convolution of f(n) and h(n) having length 3 and 5 respectively. The maximum possible sample value of f(n) and h(n) are 10 and 20 respectively. Find the maximum possible value for sum of all sample value of y(n).
Correct Answer
(A) 3000
[#110] The autocorrelation function R x (τ) of the signal x(τ) = V sin ωt is given by
Correct Answer
(A) $$frac{1}{2}$$V 2 cos ωτ