Signal Processing - Study Mode
[#141] A system is defined by its impulse response h(n) = 5 n u(n - 5). The system is
Correct Answer
(C) Unstable & causal
[#142] Let $$Xleft( {{e^{jomega }}}
ight) = sum
olimits_{n = - infty }^infty {xleft[ n
ight]{e^{ - jomega n}}} $$ xa0 xa0 xa0and $$xleft[ n
ight] = frac{1}{{2pi }}intlimits_{ - pi }^pi {Xleft( {{e^{jomega }}}
ight){e^{jomega n}}domega } .$$ If $$Xleft( {{e^{jomega }}}
ight) = frac{1}{{left( {1 - 0.2{e^{ - jomega }}}
ight)left( {1 - 0.1{e^{ - jomega }}}
ight)}},$$ xa0 xa0 xa0 what is x[n] in terms of unit discrete step function u(n)?
Correct Answer
(A) 2(0.2) n u(n) - (0.1) n u(n)
[#143] Sampling theorem denoted as
Correct Answer
(A) $$frac{1}{{Delta T}} > 2{mu _{max }}$$
[#144] Given $$mathop ylimits^{..} left( t
ight) + 3mathop ylimits^. left( t
ight) + 4yleft( t
ight) = 2mathop xlimits^{..} left( t
ight) + 7mathop xlimits^. left( t
ight) + 8xleft( t
ight)$$ Then H(s) is given by
Correct Answer
(B) $$Hleft( s
ight) = frac{{2{s^2} + 7s + 8}}{{{s^2} + 3s + 4}}$$
[#145] The discrete equation y(n + 1) + 0.5ny(n) = 0.5x(n + 1) is not attributable to a
Correct Answer
(C) Linear system