> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of > Steven Clark > Sent: Friday, February 02, 2007 4:16 PM > To: [email protected] > Subject: [Discuss-gnuradio] Quick Costas Loop question > > Is there any reason why the Costas carrier recovery loop used in the dqpsk.py example would not be suitable for similar use > in a gmsk receiver? > > TIA > -Steven
Steven, You should be able to. I've used it in an AM receiver before to get better carrier lock. The GMSK is fairly tolerant of frequency offsets, though, so the Costas loop would increase the computational complexity and it shouldn't be necessary (except under exceptional circumstances) that a change in frequency wouldn't correct. The FM receiver and the M&M do a bit of carrier correction themselves. Top of my head, I think about +-4 kHz max. Tom _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
