I've been working on an independent implementation of the FDMDV modem as a personal exercise. As I understood the description*, the central BPSK subcarrier should be at a symbol rate of 50 per second, but looking at the tone spacing it's too narrow: but a 25 symbols per second seems to line up. Am I overlooking something or is the sync subcarrier really at 25 sym/sec?
*: http://freedv.org/tiki-index.php?page=FreeDV+Specification http://n1su.com/fdmdv/FDMDV_Docs_Rel_1_4b.pdf http://www.arrl.org/files/file/FDMDV.pdf ------------------------------------------------------------------------------ _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
