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digit signal with unequal samples time interval used to frequency analyzing

Hi everyone,

 

I am just working at a project, which is obtain accelerometers signal via RS232 to frequency analyzing(STFT). But now I find a problem, that is the digital signal is with unequal samples time interval. The samples time interval is change all the time, from 15ms to 150ms, the reason is the interval of accelerometers reading is not fixed, and some data is missed through RS232 communication.

 

My question is how can I deal with these continuous samples for frequency- time domain analysis. Can I convert the digit signal to analog signals firstly, or linear interpolation ?

 

Thanks for all!

 

Ted

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Ted,

 

You could certainly use linear interpolation, if that is a reasonable model for your process.

 

There are some resampling VIs.  I do not recall the names at the moment. Have LV search for "resampling" or similar terms.

 

Lynn

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Thanks to Lynn, the BW of signal is 0.25-15 Hz, I will try.

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