figb3.m

来自「TI的DSP C55X的应用程序」· M 代码 · 共 12 行

%
% figb3.m - M-file for generating Figure B-3
%
n=[0:139];                              % time index
x1n=1.5*sin(2*pi*100*n*0.001+0.25*pi);  % sinewave
x2n=1.2*randn(1,140);                   % random noise
xn=x1n+x2n;                             % sinewave + random noise
b=[0.0305, 0 -0.0305];                  % numerator of IIR filter
a=[1, -1.5695, 0.9391];                 % denominator of IIR filter
yn=filter(b,a,xn);                      % IIR filtering
plot(n,xn,':', n,yn,'-');               % plot input and output signals