说明：  系数对称的FIR滤波器设计 * *N=8,h(n)=h(N-1-n) * *y(n)=h0*[x(n)+x(n-7)]+h1*[x(n-1)+x(n-6)] * * +h2*[x(n-2)+x(n-5)]+h3*[x(n-3)+x(n-4)]
(Symmetrical coefficient FIR filter design** N = 8, h (n) = h (N-1-n)** y (n) = h0* [x (n)+ X (n-7)] 2B ! h1* [x (n-1)+ x (n-6)]**+ h2* [x (n-2)+ x (n-5)]+ h3* [x (n- 3)+ x (n-4)])