If you have a tracking dish, you might want to look at the FLL (freq lock loop) band edge block. There was a talk on it during GRCON17 https://drive.google.com/file/d/0B-CV_07uSBIuQUVlNDFUX1BqZk0/view
If you have a symmetric signal spectrum w/ a generally flat channel (which tends to be satcom signals) then this might work as well. Jared. On Thu, Oct 26, 2017 at 5:02 AM, mehtap özkan <[email protected]> wrote: > Thank you. > Should we adjust the Loop Bandwidth to track the signal correctly? > > 2017-10-26 14:20 GMT+03:00 Jean-Michel FRIEDT < > [email protected]>: > >> costas will do the job as long as your measurement bandwidth includes >> twice the expected frequency offset, see http://jmfriedt.free.fr/efts_g >> ps.pdf >> slide 13. >> >> JM >> >> >> I am planning to track a signal from a LEO Satellite which transmits >>> approx. 100 kbps BPSK. >>> I wonder which blocks should I use since the carrier offset ranges are: >>> around -50 kHz (beginning of the pass) >>> around +50 kHz (at the endof the pass) >>> >>> Possible blocks are: >>> >>> PLL Carrier Tracking >>> Costas Loop (using the frequency output port to get the carrier freq. >>> error) >>> >>> Any other suggestions- Examples? >>> >>> Please don't offer manually shifting the frequency.(Using Gpredict) >>> >>> >> >> >> -- >> JM Friedt, FEMTO-ST Time & Frequency/SENSeOR, 26 rue de l'Epitaphe, 25000 >> Besancon, France >> >> ---------------------------------------------------------------- >> This message was sent using IMP, the Internet Messaging Program. >> >> > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >
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