Appciidix A Solutions to the Escrcises 513
Wlieii choosing ~ 3 4 , 2 criteria inlist be satisfied:
Ail iiuagc of the spectrurri Y ( J u ) iiiust lie exactly 111 1,lie baschand so n.ii).a =
d o , T/, t IN
0 No a,liasirig (overlapping imagcs) may o ( ~ i i r -
4 1
2
j l'wo possilile solutions w 1 = aiid d 4 = - The recoiistruc-tiorr h1tt.r must
rcniove all imagrs outside of the baseband, a i d 1 d the basrl)and p a s unchanged
H(jw)
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) i i \atished