Wiley signals and systems e book TLFe BO 528

513

Appciidix A. Solutions to the Escrcises

Wlieii choosing

2 criteria inlist be satisfied:

~34,

Ail iiuagc of the spectrurri Y ( J u )iiiust lie exactly 111 1,liebaschand. so n.ii).a =
d o , T/, t IN
0

No a,liasirig (overlapping imagcs) may

l'wo possilile solutions w 1 =

o(~iir-

4 1

= -.

The recoiistruc-tiorr h1tt.r must
2
rcniove all imagrs outside of the baseband, a i d 1 d the basrl)and p a s unchanged
H(jw)
j

aiid

d 4

Solution 11.20
a) r w l hand-pass signal
h) Yes, berauw the allocatcrl frcqueiicy lmid is a riiiiltiplr of the bantltvirltli,
S O (I1 42) ii \atished.

baseband

baseband