的四进制数(0.23)按二进制倒位序排列成(0213) X(n)「1 I x(o X1(2,n0)1 1-1x(1,n) X1(1,n -1j‖x(2,n0 x1(3,n x(3 (0,no) X1(0,n10) (1,no) oX1(2,n0) (2,no) XI(1, e) 3,no) X1(3,no) 图4-21一个基-4FFT基本运算的信号流图k0的四进制数0,1,2,3按二进制倒位序排列成0,2,1,3                 1 0 0 1 0 0 1 0 0 1 0 0 0, 0, 1 1 1 1 2, 1, 1 1 1 1 1, 2, 1 1 3, 3, 1 1 X n x n X n x n X n j j x n X n j j x n                                     