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AR Spectrum Estimate with Covariance Method Order Problem

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jack star
jack star 2016-5-16
关闭： MATLAB Answer Bot 2021-8-20
Hi all. I have data matrix y(80x200). I want to use AR Spectrum Estimate using Covariance Method (pcov) for orders 10,50,100. But I'm getting error at order 100. What should I do to fix it? (like zero-padding, maybe?) Or am I never be able to use order 100?
x=y; %y(80x200)
order=100; %10,50,100
nfft=80;
pxx = pcov(x,order,nfft);

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