type1_ir.m

matlab写的数字信号处理源代码,里面包括最基本的fft计算

% Chapter 7 Matlab Figure on 
%           sym impulse response odd M
%
subplot(1,1,1)
% ODD M
h = [-4,1,-1,-2,5,6,5,-2,-1,1,-4];
M = length(h); n = 0:M-1; alpha = (M-1)/2;
subplot(2,1,2);
stem(n,h); axis([-1,M,-5,8]);
title('Symmetric Impulse Response: M odd')
xlabel('n'); ylabel('h(n)')
set(gca,'XTickMode','manual','XTick',[0,5,10],'Xgrid','on')
set(gca,'XTickLabelMode','manual',...
        'XTickLabels',['   0   ';'(M-1)/2';' (M-1) '])
set(gca,'YTickMode','manual','YTick',[0],'Ygrid','off')
set(gca,'YTickLabelMode','manual','YTickLabels',['0'])