Signal Processing - Study Mode
[#466] What is the spectral density of white noise?
Correct Answer
(A) A constant
[#467] A causal LTI filter has the frequency response as shown in Fig. If input signal to filter is x(t) = e -jt , then filter output will be:
Correct Answer
(B) 2je -jt
[#468] A rectangular pulse of amplitude A and time duration Z is applied to be matched filter. Its maximum SNR is
Correct Answer
(A) $$frac{{2{A^2}Z}}{eta }$$
[#469] The ROC of anti-causal sequence is:
Correct Answer
(C) Entire z - plane except z = ∞
[#470] Consider a four point moving average filter defined by the equation $$yleft[ n
ight] = sum
olimits_{i = 0}^3 {{alpha _i}xleft[ {n - i}
ight].} $$ xa0 xa0 The condition on the filter coefficients that results in a null at zero frequency is
Correct Answer
(A) α 1 = α 2 = 0
α 0 = -α 3