理想低通抽样的证明 0=工1-n1)do280-a n=-00 cn=-00 m,0=m06,0=∑mnI,)8t-nI,) n=-00 Moj=u@)*ò(o Moao@ M(0-no,)8 ( ) ( ) T s n   t t nT  =− = −    =− = − n s s T n T ( ) 2 ( )         =− = = − n s T s nTs m (t) m(t) (t) m(nT ) (t )  ( )* ( ) 1 ()   T  s s M T M = 理想低通抽样的证明       =  −  N=− s s M n T ( )* ( ) 1           =  −  N=− s s M n T ( ) 1  