Hi, In between work and study, I have also been thinking about TDD for Codec2 on the shorter wavelengths.
GMSK or C4FM is not only power efficient, but generally speaking, it is also compatible with all those "9k6 data ready" VHF/UHF transceivers that are out there. More people will probably connect their PC soundcard or a STM32F4 discovery board into their existing radio than will go out an buy a special experimental radio just to play with Codec2. In light of this, it might be a good idea for at least one of the TDD operating modes to be compatible with as many existing transceivers as possible (eg a DC free line code with generous T-R switching delay allowances). Then, when people like it, and build or buy new Codec2-compatible transceivers, repeaters can be configured to use the advanced modes that can cram lots of voice and data into a 25kHz channel (executed properly, this could also alleviate some of the APRS people have with poor collision avoidance with Ax.25). Before anyone rushes off a writes a (TDD) protocol for Codec2, how likely is the frame size/frame rate/etc of Codec2 to change in the near future? 73 Ross Whenmouth ZL2WRW ------------------------------------------------------------------------------ Start Your Social Network Today - Download eXo Platform Build your Enterprise Intranet with eXo Platform Software Java Based Open Source Intranet - Social, Extensible, Cloud Ready Get Started Now And Turn Your Intranet Into A Collaboration Platform http://p.sf.net/sfu/ExoPlatform _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
