https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/2017RS006420 or http://jmfriedt.free.fr/agu_dcf77.pdf We are currently working on simultaneously decoding (e)LORAN/MSF, TDF & DCF77 v.s GPS with a sound card.
JM -- JM Friedt, FEMTO-ST Time & Frequency/SENSeOR, 26 rue de l'Epitaphe, 25000 Besancon, France May 2, 2019 10:24 PM, "Brad Hein" <linuxb...@gmail.com> wrote: > I took a Raspberry Pi and attached a 48KHz USB sound card, with a big > magnetic loop antenna fed > into the mic. A little cheesy? yes! But I'd like to try and see if I can > receive VLF. It's in a > remote location with little to no interference so I'm thinking my chances > should be good. The > challenge I'm facing is that I need to write the SDR logic to "tune" > throughout the 0-24KHz tuning > range. > > My question is, being that a sound card source presents samples in float and > not the usual complex > data type, can I still apply the same SDR logic that we use for SSB/FM/AM > demodulation such as > those presented in the Gnuradio tutorials (eg. > http://www.csun.edu/~skatz/katzpage/sdr_project/sdr/grc_tutorial3.pdf) and if > not, how do I go > about translating the float input into something I can use to feed existing > AM/FM/SSB demodulator > flowgraphs? > > I run many other flowgraphs on Raspberry Pi's remotely so the networking and > remote aspect of the > project will be easy for me. I really just need some initial guidance knowing > which direction to go > in terms of tuning. > > Thanks! > Brad _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
