FFT

Nancy Jewel Mcdonie

Hi all, 

I'm learning how to  convert from time domain to frequency domain using Altair Compose, I see some variables that I don't really understand:

Can anyone explain for me?

Thanks.

 

Orestis_YB

Hello Nancy,

the variables that you see over here are:

Fs: sampling frequency which defines the number of samples per second taken from a continuous signal to make a discrete or digital signal.

L: length of signal which defines the total number of measured points

T: sampling period which defines the time difference between two consecutive samples (here it's used just to help construct the time vector below).

t: time vector contains from beginning to end its time instant that a measurement on the signal was made.

I am attaching here some more information

1) FFT in-build function documentation: https://help.altair.com/compose/help/en_us/topics/reference/oml_language/SignalProcessing/fft.htm?hl=fft

2) Signal Processing video series - FFT:
https://www.youtube.com/watch?v=HV7WqrZppyg


Hope this helps!

Best regards,
Orestes.

RSGarciarivas

Hi Nancy,

Adding to what Orestes said, you might find it useful to look at our signal processing eLearning:

Altair Compose - Signal Processing

Rafael