Hello all, I am doing some work with the GMSK demodulator block that is provided as part of GNU radio. I had been noticing some problems where sometimes the demodulator would not be able to lock on to the signal (generated with an agilent signal generator) properly and determined that the problem is due to a carrier frequency offset of ~5 kHz. While I could technically just compensate for the 5 kHz offset, this wouldn't account for differences with other crystals or signal sources. I know that the mueller and muller timing recovery algorithm that is used in the GMSK block is dependent on carrier tracking so therefore I assume that I would need a carrier tracking loop that isn't dependent on timing recovery in order for it the design to work properly. Has anybody attempted to add carrier recovery to the GMSK demod or could offer any pointers on a good possible solution? Any input into this would be greatly appreciated. Thanks for all of the help, John -- View this message in context: http://www.nabble.com/GMSK-and-Carrier-Recovery-tf... Sent from the GnuRadio mailing list archive at Nabble.com.
on 2007-01-29 23:40