Signal Processing - Study Mode
[#161] Choose the function f(t), -∞ < t < ∞, for which a Fourier series cannot be defined?
Correct Answer
(C) exp (-|t|)sin (25t)
[#162] The Laplace transform of a function f(t) u(t), where f(t) is periodic with period T, is A(s) times the Laplace transform of its first period. Then
Correct Answer
(B) $$Aleft( s
ight) = {1 over {left( {1 - exp left( { - {T_s}}
ight)}
ight)}}$$
[#163] The DFT of a vector [a b c d] is the vector [α β γ δ]. Consider the product [left[ {p,q,r,s}
ight] = left[ {a,b,c,d}
ight]left[ {x08egin{array}{*{20}{c}}
a&b&c&d \
d&a&b&c \
c&d&a&b \
b&c&d&a
end{array}}
ight]] The DFT of the vector [p q r s] is a scaled version of
Correct Answer
(A) [α 2 β 2 γ 2 δ 2 ]
[#164] If the fourier transform of f(t) is F(jω), then what is the Fourier transform of f(-t)?
Correct Answer
(B) F(-jω)
[#165] Which one of the following is the correct statement? The continuous time system described by y(t) = x(t 2 ) is
Correct Answer
(D) non-causal and time-variant