ex070400.m

来自「DSP2 using matlab v4」· M 代码 · 共 31 行

% Chapter 7: Example 7.4 Type-1 Linear phase FIR filter

%

subplot(1,1,1)

h = [-4,1,-1,-2,5,6,5,-2,-1,1,-4];

M = length(h); n = 0:M-1;

[Hr,w,a,L] = Hr_Type1(h);

amax = max(a)+1; amin = min(a)-1;

subplot(2,2,1); stem(n,h); axis([-1 2*L+1 amin amax])

xlabel('n'); ylabel('h(n)'); title('Impulse Response')

subplot(2,2,3); stem(0:L,a); axis([-1 2*L+1 amin amax])

xlabel('n'); ylabel('a(n)'); title('a(n) coefficients')

subplot(2,2,2);plot(w/pi,Hr);grid

xlabel('frequency in pi units'); ylabel('Hr')

title('Type-1 Amplitude Response')

subplot(2,2,4);pzplotz(h,1)