transfer function measurement with maximum length sequence?
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Hey,
I'm desperately and unsuccessfully trying to do a transfer function measurement with maximum length sequence. I'm using cross spectra techniques to compute the transfer function calculations but am having trouble in using the maximum length sequence correctly. I think I should get 2 periods of the mls signal, one to excite the filter and the other to do the calculations. it was suggested to get the signal over two peridos by doing c=cat(1,x,x) but after how do i do the calculations over the second period?
N=1023; %length of signals being tested
[x fs bits] = wavread('mls1023'); %read in mls signal, input signal in x
[b,a] = cheby1(9,0.5,0.3); %generate a LTI system (a simple filter)
y=filter(b,a,x);
thanks in advance
Catarina
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