how to process a random signal with bandpass filter, windowed integrator and maximum amplitude?

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Jorge 2014-8-11

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https://ww2.mathworks.cn/matlabcentral/answers/147100-how-to-process-a-random-signal-with-bandpass-filter-windowed-integrator-and-maximum-amplitude

编辑： Star Strider 2014-8-11

Hi all,

I've got a random signal with two vectors; time and pressure. I used a bandpass filter. I droped it here to take a look. I'm not sure if the signal is well filtered.

a=xlsread('Mini_With_Knock.xlsx','A2:A430')
b=xlsread('Mini_With_Knock.xlsx','B2:B430')
plot(a,b)
hold on
d = fdesign.bandpass('Fst1,Fp1,Fp2,Fst2,Ast1,Ap,Ast2',1e3,2e3,20e3,21e3,40,1,40,48e3);
Hd = design(d,'equiripple');
Hd.PersistentMemory = true;
fvtool(Hd);
y = filter(Hd,b);
abs=abs(y)
max=max(abs)
plot(a,y);