?? program_03_06.m
字號:
% Program 3_6
% Illustration of Overlap-Add Method
%
% Generate the noise sequence
colordef black;
R = 64;
d = rand(R,1)-0.5;
% Generate the uncorrupted sequence and add noise
for m = 1:1:R;
s(m) = 2*(m-1)*((0.9)^(m-1));
x(m) = s(m) + d(m);
end
k = 0:1:R-1;
% Read in the length of the moving average filter
M = input('Length of moving average filter = ');
% Generate the moving average filter coefficients
h = ones(1,M)/M;
% Perform the overlap-add filtering operation
y = fftfilt(h,x,4);
% Plot the results
plot(k,s,'r-',k,y,'g--')
xlabel('Time index n');ylabel('Amplitude')
legend( 'r-','s[n]','g--','y[n]')
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