Along these lines.. the group might want to investigate the HamDRM mode that has multiple QAM modes. I've personally used this mode quite effectively for digital SSTV over FM on a local repeater via the standard 1200baud packet connector on most VHF radios. Both Qsstv ( http://users.telenet.be/on4qz/index.html ) and TRXAMADRM ( http://pa0mbo.nl/ties/public_html/hamradio/txamadrm/ ) are available for Linux and could be used as tools to do more investigation. HamDRM is quite fast and with it's built-in Reed Solomon FEC, it's quite robust too! Check out page 7 of http://pa0mbo.nl/ties/public_html/hamradio/txamadrm/txamanew.pdf to see some of the details on this mode though it runs at 2.2 or 2.5Khz by default.
Back on this specific thread though, I do agree that trying to use FM radios is probably going to hinder the bit rate. SDR technology is just getting too cheap to short-sell a new technology like CODEC2! --David KI6ZHD ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
