overlapping for FFT

[Patra79]

hi there,

I would like to do overlapping in FFT can anyone suggest me what is the best possible approach to include it. I am attaching my VI for which I have created to read the data from an ascii file and also I have used waveform segment VI so as to read teh data in segments.

thanks and regards,

Suresh

[Smootastic]

Hi Suresh,

Is something similar to this example what you're trying to do?

http://decibel.ni.com/content/docs/DOC-2911

I'm sure we can modify this SubVI to use Waveform Data.

[Patra79]

Hi Kyle,

yeh it is something similar to the example described but I will like to have 75% overlap. the reason for me to use overlap is to have more number of data points so as to smoothen response. i would very much appreciate if you could help me out here.

Thanks and regards,

Suresh 

[Peñata]

Hi Suresh,

It looks like you should be able to adjust the overlap by modifying the "shift" global variable. Is there a particular issue you are having when using this example?

Aaron P

National Instruments

Applications Engineer

http://www.ni.com/support