Hello, does anyone know if any stability and accuracy evaluation of the digital PLL as implemented in GNU Radio exist?
I'm trying to measure the frequency of a very low phase-noise signal and I see strange artifacts for certain combinations of detuning (residual frequency difference between the signal and the N210 center frequency) and PLL bandwidth. I already have re-implemented the PLL blocks to measure phase using a more accurate arctan2() function than the one provided by Volk (which uses a linear approximation for small angles) but I still see strange things that I believe are due to the control loop going nuts due to numerical problems. If some work has already been done in this regard I could probably save some time. Thanks. Cheers, Daniele _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
