> > + OFDM isn't needed unless your bandwidth is significantly wider, as its > a flat fading channel. Single carrier PSK/QAM is fine and has a better > PAPR. M-QAM only needed if you want wideband data, not needed for voice > as we have good compression. > > + Can't seen any good reason for FDMA, I'm shooting for TDMA with the > SM2000 and Brady's work. TDMA has been used for decades on GSM so PA > design issues aren't a practical issue (I'm not interested in re-use of > legacy FM radios). >
Hi David, OFDMA (not OFDM) is used as an access mode in LTE in combination with TDM. I'm toying with the idea for a while now, but with 5-6 hours a week available I haven't made much progress lately. Regarding 4FSK, personally I see no advantage over 2FSK. It's certainly more complicated to get working. Cheers, Adrian ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Freetel-codec2 mailing list Freetel-codec2@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freetel-codec2
