2) You are asked to design a DSB-SC modulator to generate a modulated signal km(t) cos wet, where m(t) is a signal band-limited to B Hz. Figure below shows a DSB-SC modulator available in the stock room. The carrier generator available generates not cos w̟t, but cos³ w̟t. M(f) km(t)cos³ wet m(t) A Filter f -B B cos w̟t Sketch the signal spectra at points a and b. Is it possible to realize a DSB-SC modulator as in the figure above? (If yes) what kind of filter b) should be used? Comment on the bandwidth of the filter and the minimum and/or maximum frequencies that the filter should allow to pass. c) What is the minimum usable value of wc? a=1 , b=8, c=0, d=9,e=0_f=0 g=0 h=6 i=2|

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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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2) You are asked to design a DSB-SC modulator to generate a modulated signal km(t) cos wet, where
m(t) is a signal band-limited to B Hz. Figure below shows a DSB-SC modulator available in the stock
room. The carrier generator available generates not cos w̟t, but cos³ w̟t.
M(f)
km(t)cos³ w,t
m(t)
А
Filter
if
-B
В
cos³ wet
Sketch the signal spectra at points a and b.
а)
b) . Is it possible to realize a DSB-SC modulator as in the figure above? (If yes) what kind of filter
should be used? Comment on the bandwidth of the filter and the minimum and/or maximum frequencies
that the filter should allow to pass.
c)
What is the minimum usable value of wc?
a=1 , b=8, c=0, d=9 ,e=0 f=0 g=0 h=6 i=2|
Transcribed Image Text:2) You are asked to design a DSB-SC modulator to generate a modulated signal km(t) cos wet, where m(t) is a signal band-limited to B Hz. Figure below shows a DSB-SC modulator available in the stock room. The carrier generator available generates not cos w̟t, but cos³ w̟t. M(f) km(t)cos³ w,t m(t) А Filter if -B В cos³ wet Sketch the signal spectra at points a and b. а) b) . Is it possible to realize a DSB-SC modulator as in the figure above? (If yes) what kind of filter should be used? Comment on the bandwidth of the filter and the minimum and/or maximum frequencies that the filter should allow to pass. c) What is the minimum usable value of wc? a=1 , b=8, c=0, d=9 ,e=0 f=0 g=0 h=6 i=2|
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