h(n) x(n) ON。N1 ↑h(n-m) 0N2N3 n=0 t h(n-m) -N。0 m ☐n=N。+N, h(n-m） 0 N2 m On=Nm h(n-m) n=N+N h(n-m) m N: 2024o20l n=N m 29x n( ) 0 n N2 N3 h n( )0 n N0 N1 n N N = +0 2 n N N = +1 3 0 n N= 1 n N = h n m ( ) − −N1 −N0 0 m n = 0 h n m ( ) − 0 m h n m ( ) − 0 m h n m ( ) − 0 N2 m h n m ( ) − m 0 N3 2024/10/21 29