topic Re: Cross correlation for 5 signals in LabVIEW
https://forums.ni.com/t5/LabVIEW/Cross-correlation-for-5-signals/m-p/35376#M23093
Felix,<BR />What do you mean by "cross correlate signals?" What kind of signals do you have, are they related? <BR />If you already have all of the values used in the function and are just concerned on how to implement this function into LabVIEW, you can use one of the Mathematics>>Formula VIs. <BR /><BR />Zvezdana S.<BR />National Instruments <BR />Fri, 15 Feb 2002 18:58:39 GMTZvezdana S.2002-02-15T18:58:39ZCross correlation for 5 signals
https://forums.ni.com/t5/LabVIEW/Cross-correlation-for-5-signals/m-p/35375#M23092
Hi folks,<BR /><BR />I want to cross correlate 5 signals with constant delay. So I want the<BR />function:<BR /><BR />Corr(\tau)= \int(f1(t)*f2(t+\tau)*f3(t+2*tau)*f4(t+3*\tau)*f5(t+4*\tau))dt<BR /><BR />Has anyone already written a vi like this? Would it be much faster if<BR />I'd write it in C and would use the "Call Library Function"?<BR /><BR />come and join us for skiing in Davos, Felix<BR /><BR /><BR /><BR /><BR /> Felix Tiefenbacher<BR /> <BR /> Swiss Federal Institute for Snow- and Avalanche Research<BR /> Avalanche Dynamics<BR /> Fluelastrasse 11<BR /> CH-7260 Davos Dorf<BR /> <BR /> Tel: +41 (0)81/417 02 53<BR /> Fax: +41 (0)81/417 01 10 <BR />Wed, 13 Feb 2002 15:36:13 GMThttps://forums.ni.com/t5/LabVIEW/Cross-correlation-for-5-signals/m-p/35375#M23092felix2002-02-13T15:36:13ZRe: Cross correlation for 5 signals
https://forums.ni.com/t5/LabVIEW/Cross-correlation-for-5-signals/m-p/35376#M23093
Felix,<BR />What do you mean by "cross correlate signals?" What kind of signals do you have, are they related? <BR />If you already have all of the values used in the function and are just concerned on how to implement this function into LabVIEW, you can use one of the Mathematics>>Formula VIs. <BR /><BR />Zvezdana S.<BR />National Instruments <BR />Fri, 15 Feb 2002 18:58:39 GMThttps://forums.ni.com/t5/LabVIEW/Cross-correlation-for-5-signals/m-p/35376#M23093Zvezdana S.2002-02-15T18:58:39ZRe: Cross correlation for 5 signals
https://forums.ni.com/t5/LabVIEW/Cross-correlation-for-5-signals/m-p/35377#M23094
"Zvezdana S." <X> wrote in message news:<5065000000050000004B600000-1012609683000@exchange.ni.com>...<BR />> Felix,<BR />> What do you mean by "cross correlate signals?" What kind of signals do<BR />> you have, are they related?<BR />> If you already have all of the values used in the function and are<BR />> just concerned on how to implement this function into LabVIEW, you can<BR />> use one of the Mathematics>>Formula VIs.<BR />> <BR />> Zvezdana S.<BR />> National Instruments<BR /><BR />Yes, the 5 signals are related in the sense that they are similar but<BR />time shifted. Using the cross correlation I want to calculate the<BR />thime shift. The problem is that we have a lot of data. We sample 25<BR />channels with 50 kHz in total. I was concerned about the velocity of<BR />the vi and a simple handling.<BR /><BR />Thanks Felix <BR /></X>Wed, 20 Feb 2002 10:06:08 GMThttps://forums.ni.com/t5/LabVIEW/Cross-correlation-for-5-signals/m-p/35377#M23094felix2002-02-20T10:06:08Z