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Old 10th May 2005, 10:37 AM   #1
shyfx is offline shyfx  Australia
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Join Date: Apr 2003
Location: Melbourne, Australia
Default Sampling (Signal Analysis)

I am at uni doing electronics and one of our subjects is circuit and signal analysis. We are currently doing the sampling theorem and I am not sure on how this works.

How does one sample a signal then reconstruct it? We are using MATLAB to do this, so we just generate a sampled signal instead of sampling a continuous signal. From there, where do I go?
All I can make out is that I Fourier transform it using FFT in MATLAB, then sample this function, run it through a low pass (ideal rectangle) filter then from there, I can reconstruct it, but I haven't the slightest clue how and I can't gather anythign from my text.
http://www.jhu.edu/~signals/sampling/
I see this website does it.

Any help would be great!!

Thanks
-Mikey
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Old 10th May 2005, 11:33 AM   #2
joensd is offline joensd  Germany
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Join Date: Dec 2001
Location: Germany
Hi Mikey,
am in the same boat here. Just started to have a seminar called "signals&systems" working with Matlab also.
Donīt know much about it but will try to help as far as I can.

Quote:
All I can make out is that I Fourier transform it using FFT in MATLAB, then sample this function, run it through a low pass (ideal rectangle) filter then from there, I can reconstruct it, but I haven't the slightest clue how and I can't gather anythign from my text.
Seems like you know whatīs going on so where is your exact problem.
The formulas of each step?

Can you send me the m-file or did you simulate with Simulink?

greets
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