反转与平移相结合即由 x()→>x(-t±t0 x(n)→>x(-n±m0) 例:x()→>x(-1-1) 作法一:x(1)→x(t-1)→x(-1-1) x() x(t-1) x(-t-1) t→)t-1 t→)-t 01T+1 T1-10 作法二:x(1)→x(t+1)→x-(t+1) x(t+1) t+1→>-(+1) t→t+1 1T1 T-16 反转与平移相结合,即由 例: 作法一: ( ) ( ) ( ) ( ) 0 0 x n x n n x t x t t       x(t)  x(t 1)  x(t 1) x(t)  x(t 1) 0 T x(t) t 1 0 1 1 T+1 0 1 t t  t 1 x(t 1) x(t 1) t  t-T-1 -1 t 作法二: x(t)  x(t 1)  x[(t 1)] -1 T-1 t 1 0 1 t  t 1 x(t 1) t 1 (t 1) -T-1 -1 t x(t 1)