Problem 15.19. Consider the frequency response -j, H(ej") = 0

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Problem 15.19. Consider the frequency response
S -i,
-j,
0 <w< T
H(ej") =
j,
-T <w<0
which corresponds to a 90º phase shifter. Show that the corresponding impulse response sequence is
given by
{
2
odd n
h(n)
0,
even n
Is the phase shifter a stable system?
Transcribed Image Text:Problem 15.19. Consider the frequency response S -i, -j, 0 <w< T H(ej") = j, -T <w<0 which corresponds to a 90º phase shifter. Show that the corresponding impulse response sequence is given by { 2 odd n h(n) 0, even n Is the phase shifter a stable system?
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