Hi Edson, On 1/10/2017 12:39 PM, Edson W. R. Pereira wrote:
> I got across this paper some time ago. The algorithm suggested could > perhaps be applied to FreqCal. > > https://mgasior.web.cern.ch/mgasior/pap/FFT_resol_note.pdf > > 73, Edson PY2SDR Thanks for the pointer to an excellent paper! The parabolic interpolation described by Gasior and Gonzalez is exactly what is done in peakup.f90. It easily gets us easily down to better than 0.1 Hz, with a stable signal. The even better performance they get using Gaussian interpolation would not be useful in our FreqCal procedure. Owing to ionospheric propagation effects, our HF test signals are not stable in frequency to a tiny fraction of one Hz. -- Joe, K1JT ------------------------------------------------------------------------------ Developer Access Program for Intel Xeon Phi Processors Access to Intel Xeon Phi processor-based developer platforms. With one year of Intel Parallel Studio XE. Training and support from Colfax. Order your platform today. http://sdm.link/xeonphi _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
