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Test Signal !!

Started by Unknown December 16, 2003
Hi Everyone.....Well this is Nitin here and I am doing my MS from the
University of Hartford.
Actually , I wanted to know, suppose I have designed a Butterworth
filterusing the "Butter" command in Matlab and "Buttord" for finding
the order of the Filter ...
Now I got the Frequency response by using the "Freqz" command.
Now I want to test the filter using a test signal in the passband
frequecy, how should I generate the test signal and then finally
analyze the filter....how the Filter behaves with the Test Signal.
Thanks
Nitin



Hi Nitin!

I sugest random sequence, white Gaussian noise:

x=randn(1024,1);

LP filter is:

L=7;
F=0.2;
[B,A]=butter(L,2*F);

y is filtered signal

y=filter(B,A,x);

Spectrums of original (x) and filtered signal are performed by FFT:

Xt(x);
Xas(X);
Yt(y);
Yas(Y);

Plotting of amplitude spectrums:

plot(Xa);
plot(Ya);
Regards
Predrag Valozic
----- Original Message -----
From: <>
To: <>
Sent: 2003. prosinac 16 13:04
Subject: [matlab] Test Signal !! > Hi Everyone.....Well this is Nitin here and I am doing my MS from the
> University of Hartford.
> Actually , I wanted to know, suppose I have designed a Butterworth
> filterusing the "Butter" command in Matlab and "Buttord" for finding
> the order of the Filter ...
> Now I got the Frequency response by using the "Freqz" command.
> Now I want to test the filter using a test signal in the passband
> frequecy, how should I generate the test signal and then finally
> analyze the filter....how the Filter behaves with the Test Signal.
> Thanks
> Nitin >
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check out sptool ,fdatool and filter.

Mandar
--- wrote:
> Hi Everyone.....Well this is Nitin here and I am doing my MS from
> the
> University of Hartford.
> Actually , I wanted to know, suppose I have designed a Butterworth
> filterusing the "Butter" command in Matlab and "Buttord" for
> finding
> the order of the Filter ...
> Now I got the Frequency response by using the "Freqz" command.
> Now I want to test the filter using a test signal in the passband
> frequecy, how should I generate the test signal and then finally
> analyze the filter....how the Filter behaves with the Test Signal.
> Thanks
> Nitin >


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