topic Re: Power Spectrum Density conversion to Time Series Data in LabVIEW

Power Spectrum Density conversion to Time Series Data

rustawilliams2011 — Fri, 15 Jul 2011 20:49:44 GMT

Hi,

This may seem an odd request but is there a way to convert power spectrum density data back to the time series data that generated it in the first place. I have lost the original time series data but still have the PSD and need the time series to do other analysis.

Thanks,

Rhys Williams

Re: Power Spectrum Density conversion to Time Series Data

Darin.K — Fri, 15 Jul 2011 22:28:01 GMT

Hate to be the bearer of bad news, but there are an infinite number of time series that will generate a given PSD. You lose all phase information upon taking the PSD. For this reason I almost always save time domain data, or at least complex FFT values.

Re: Power Spectrum Density conversion to Time Series Data

rustawilliams2011 — Fri, 15 Jul 2011 22:41:38 GMT

Thanks Darin,

I was saving pretty extensively but I accidentally gave the same filename for two different parameters, doh.

Rhys