From: Rachel2010 on 11 Mar 2010 08:55 Hi all, I have a few periods of a signal converted to an ASCII *.txt file that I want to apply Autocorrelation & Burg Method to seperately and then plot the frequency response for each. Does anyone have optimized C code or Java for doing so. Thank you.
From: Steve Pope on 11 Mar 2010 09:49 Rachel2010 <HUGHMOLONEY(a)GMAIL.COM> wrote: > I have a few periods of a signal converted to an ASCII *.txt > file that I want to apply Autocorrelation & Burg Method to > seperately and then plot the frequency response for each. Does > anyone have optimized C code or Java for doing so. Thank you. Do you need to do this to exactly one dataset, or do you need an ongoing capability to do this? I do not think the popular opensource C++ DSP libraries have everything you need out of the box. So it would take a few days for an average designer to put this together. If you have access to a MATLAB environment, and only need to process one dataset, it can be done in a few hours. Steve
From: Rachel2010 on 11 Mar 2010 13:04 >Rachel2010 <HUGHMOLONEY(a)GMAIL.COM> wrote: > >> I have a few periods of a signal converted to an ASCII *.txt >> file that I want to apply Autocorrelation & Burg Method to >> seperately and then plot the frequency response for each. Does >> anyone have optimized C code or Java for doing so. Thank you. > >Do you need to do this to exactly one dataset, or do you >need an ongoing capability to do this? > >I do not think the popular opensource C++ DSP libraries have >everything you need out of the box. So it would take a few days >for an average designer to put this together. If you have >access to a MATLAB environment, and only need to process one >dataset, it can be done in a few hours. > > >Steve > Hi Steve, I just need to do this to one dataset and it has to be done in C/C++ or Java. I thought there would be some sample code examples on here but doesn't seem so. Rachel
From: Clay on 11 Mar 2010 14:46 On Mar 11, 8:55 am, "Rachel2010" <HUGHMOLO...(a)GMAIL.COM> wrote: > Hi all, > > I have a few periods of a signal converted to an ASCII *.txt file that I > want to apply Autocorrelation & Burg Method to seperately and then plot the > frequency response for each. Does anyone have optimized C code or Java for > doing so. Thank you. The book "Numerical Recipes in C" does have a routine for Maximum Entropy Method. The book (chapters at least) use to be on the web available for free. Try looking here: http://www.nr.com/ IHTH, Clay
From: Steve Pope on 11 Mar 2010 16:23 Clay <clay(a)claysturner.com> wrote: >On Mar 11, 8:55�am, "Rachel2010" <HUGHMOLO...(a)GMAIL.COM> wrote: >> I have a few periods of a signal converted to an ASCII *.txt file that I >> want to apply Autocorrelation & Burg Method to seperately and then plot the >> frequency response for each. Does anyone have optimized C code or Java for >> doing so. Thank you. >The book "Numerical Recipes in C" does have a routine for Maximum >Entropy Method. The book (chapters at least) use to be on the web >available for free. Try looking here: http://www.nr.com/ I think the MEM is unrelated to Rachel's problem, although I could be mistaken. I assume the problem is to generate LPC coefficients by the two different methods (autocorrelation followed by e.g. LevinsonDurbin; or a lattice analyser using Burg arithmetic); and to then compare the frequency response of the allpole filters generated by these two methods. ("Frequency response" possibly meaning the PSD of the impulse response of these filters.) Steve

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