Wiley signals and systems e book TLFe BO 308

11.4 Exerrises 293 a) Draw A(j.-i)9-0 a ( t ) and a suitable example for X ( p ) in tlsc same slietch b) Comparc the amplification of the aperture fL1nction at the frrqurirc-y zero and at the band limits of 1ht3 signal By t ~ rnaiiy )~ dB is it, less at the I m d limits? c ) DctPrmine z so that the aperture functioii riialirs il suitahle prcliniiriary anti- aliasing filter if sarripling is carried out at fa = 10 kHL Exercise 11.24 The effect of triple projection 011 the flirlterivlg of cinematic films (see Examplc 11.2) will br im-estigat,ed The interpolation filtw takes the form of a mechanical sliu with t he sketched Express h ( t ) using recl-hurtions and (5-impnlses, as clescribed in (11 ) Then H ( p ) and skctch J H ( j u ) l€01 T = In particular, try to deiitify the zeros of H ( p ) &