On Tue, Mar 19, 2013 at 4:14 AM, Gullik Webjörn <[email protected]> wrote:
> For anyone interested (and with the skills), just increase the > bandwidth, To be clear: the SPEECH bandwidth, not the RADIO bandwidth. (the analog audio portion at your microphone or speaker) The idea is to have speech wider than 4 kHz being crammed into a radio channel that narrower than 4 kHz. It's not possible with analog, but possible with digital. > add a few carriers to the modem, > and modify to your hearts extent, this goes in the nice Amateur > tradition of "hacking" somebody elses > solution, and publishing your findings and results. I strongly suspect this requires reworking the codebook stuff and generally rebalancing how bits are allocated, etc. > I wonder if starting with the "filter" would be a practical approach. > After all, this is the bit in a already existing > transceiver that decides what you can receive, and what noise will pass > the RX chain, unless you want to > design an entirely NEW system. The filter is 2 to 3 times as wide as the existing signal already, assuming a normal SSB radio. The width is going unused. ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_mar _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
