信号与系统重点题英文版课后答案.pdfVIP

Chapter8

8.1Solution:

Y(jw)=2X(j(w−w))

0

jw0t

∴y(t)=2x(t)e

1

−jwt

thatisx(t)=y(t)e

0

2

x(t)=y(t)m(t)

1

−jwt

∴m(t)=e

0

2

8.3Solution:

Accordingtotheconditionsasgiven,wewillsee:

SupposeX(jw)is:

Then,ifp(t)passesthroughtheideallossfilterwhosefrequencyresponseH(jω)

withcutofffrequency2000π,wewillgetY(jw)=P(jω)H(jω)=0,thatisy(t)=0.

Soy(t)=0.

8.22Solution:

Accordingtotheconditionsasgiven,wewillget:

8.28Solution:

thesystemabouttheimntationofsingle-sidebandmodulationis:

(a).According