Old thread, but I've implemented a streaming encoder/decoder for FSK bauddot (used for example for TTY/TDD over telephone lines). I used the excellent AudioIO and Multirate packages. The implementation is currently baked into my fork of AudioIO
https://github.com/goretkin/AudioIO.jl You can run the following example: julia> include("examples/tty_full.jl") INFO: Initializing PortAudio. Expect errors as we scan devices INFO: Scheduling PortAudio Render Task... hooked up receiverINFO: PortAudio Render Task Running... WARNING: Phase Noise: 1.5707963705062866 hooked up transmitterWARNING: Phase Noise: 1.5707963705062866 julia> BEEP BOOP BEEP BEEP BEEP. where the string is being decoded from the tones generated from the speaker and received by the mic. If you can get a good connection to the telephone network (I coupled acoustically with earphones on my cellphone in TTY mode), you can also communicate with TDD devices. On Tuesday, April 8, 2014 3:17:26 PM UTC-4, Kaj Wiik wrote: > > > > On Tuesday, April 8, 2014 5:43:05 AM UTC+3, Jay Kickliter wrote: >> >> You're absolutely right tagging, but have no intention of turning Radio >> into a streaming processing framework. My inspiration is LiquidDSP >> <http://liquidsdr.org> and Matlab's communications toolbox. If liquid >> wasn't GPL, I would just write an interface to it. It can be compiled >> without any dependancies, and has phenomenal documentation. >> > > Hmm, there is GSL.jl and GSL is GPL (and in fact also FFTW), I guess there > are no legal problems in writing an interface (unless you plan to use it in > a closed source software). > > Very interesting thread, a lot of good work, I'd very much like to see the > RTLSDR interface :-)... > > Cheers, > Kaj > >
