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From: | Jean-Michel FRIEDT |
Subject: | Re: [Discuss-gnuradio] Getting signal from a LEO Satellite? ( Doppler shift handling) |
Date: | Thu, 26 Oct 2017 13:20:11 +0200 |
User-agent: | Internet Messaging Program (IMP) H3 (4.3.7) |
costas will do the job as long as your measurement bandwidth includes twice the expected frequency offset, see http://jmfriedt.free.fr/efts_gps.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
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