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code in signal processing
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Hi people, I have a problem with a code.
A = [ 1 2 3 4]; % amplitude fr = [20 30 40 50]; % frequency
% Number of time samples, and number of samples per FFT Nt = 1024;
% Sampling freqency fs = 1000;
% Frequency spacing df = fs/Nt;
% Time t = [0:Nt-1]/fs;
I want to sum four signals as:
y = A*cos(2*pi*fr*t)
I want to use a FOR to do it, but the A and fr goes until 4 and the t goes until 1024.
I would like to do something
y = 1*cos(2*pi*20*t) + 2*cos(2*pi*30*t) + 3*cos(2*pi*40*t) + 4*cos(2*pi*50*t);
But I want to use a FOR.
How can I do it?
thanks
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回答 (1 件)
Walter Roberson
2011 年 6 月 24 日
y = zeros(size(t));
for K = 1:length(A)
y = y + A(K) * cos(2*pi*fr(K)*t);
end
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