About Windowed FFT

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maurits
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About Windowed FFT

Сообщение maurits »

Hi. I am maurits. I really need a help. I have an excel data and than I use a Real FFT vi to get the frequency spectra of data/wave. Now, I want to use windowed FFT with the same excel data, but was fail. Input for real FFt is a vector, while input for windowed FFT is a point. Can someone help me how to use the excel data for input of windowed FFT?. Thank you for advance.
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mzu2006

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Re: About Windowed FFT

Сообщение mzu2006 »

Hi, Maurits, and welcome to the forum. Please, provide the data you are using and post the code you are trying to make work.
maurits
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Re: About Windowed FFT

Сообщение maurits »

Hi mzu2006

I attach the excel data (csv file) and the code (using real FFT.Vi). There are 2 channels. The sampling freq. is 125 Mhz.
(Please save and change the xls file to csv file for data input)
Thank you for your kind attention.

Maurits
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Using Real FFT.vi
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Re: About Windowed FFT

Сообщение mzu2006 »

Windowed FFT PtByPt VI - is one of the VIs that is used to process signals as they are acquired. So, naturally, it uses 1 input for the current datapoint. One way to solve it would be to create a for loop, index your signal at the border, and feed Windowed FFT PtByPt VI single point at a time. You will get number of spectra as a result. Something like that:
windowedFFT.png
windowedFFT.png (14.65 КБ) 6313 просмотров
Depending on your final goal there might be easier/ more effective solutions.
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Re: About Windowed FFT

Сообщение maurits »

I am sorry, I can not run the code. Could you give me more detail information about the code? (how to index the signal; how to feed more than 1000 data with a certain rate sampling of frequency; how to display the results). Sorry for giving many questions in this forum.
Thank you for your help.

Maurits
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Re: About Windowed FFT

Сообщение mzu2006 »

maurits писал(а):I am sorry, I can not run the code.
Mauritis,
the code is posted. What prevents you from running it? Post your code.
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