证:Z7[x(m)*(m)=∑[x(m)*h(m) n=-00 r(mn(n-m)2 n=-00n=-0 ∑x(m)∑h(n-m)" m=-0 n三-00 ∑x(m)="H(=) h=-00 =H(z)X(=) mx(R,、F)<=<mi(R,R)[ ( )* ( )] [ ( )* ( )] n n ZT x n h n x n h n z 证: ( ) ( ) n n m x m h n m z ( )[ ( ) ] n m n x m h n m z ( ) ( ) ( ) ( ) m m x m z H z H z X z max , min , x h x h R R z R R