Yes, but it isn't practical or effective. You would be re-inventing 802.11 very poorly. 1) You could use the given technique to create the MOdulation side of

Yes, but it isn't practical or effective. You would be re-inventing 802.11 very poorly. 1) You could use the given technique to create the MOdulation side of a modem[1]. You would have to solve the receiver and DEModulation side. Not likely to be do-able with a bare Raspberry Pi so you will end up adding a receiver and probably a demodulator (software demodulation is theoretically within the grasp of a Raspberry Pi). Ref: http://en.wikipedia.org/wiki/Modem http://en.wikipedia.org/wiki/Modem 2) Your data rate would be dependent on how well you implement your modem. Assuming you limit yourself to audio range frequency modulation (i.e. 10-3000Hz), you will have a hard time exceeding 300 baud using frequency shift keying (e.g. modulate with two tones, one indicating '0' and the other indicating '1'). If you use phase shift keying, you may achieve 2400 baud, but (a) I really doubt that a Raspberry Pi can do phase shift keying, (b) demodulating PSK is much more difficult that frequency shifting, and (c) in my limited experience, attempting phase shift modulation on top of a FM carrier doesn't work for crap (FM can be viewed as a type of phase shift modulation, so you end up phase shift modulating a phase shift modulator which doesn't demodulate + demodulate reliably into your baseband signal). Ref: http://en.wikipedia.org/wiki/Modem#Narrow-band.2Fphone-line_dialup_modems http://en.wikipedia.org/wiki/Modem#Narrow-band.2Fphone-line_... Higher data rates over phone lines encode multiple bits per baud (signaling unit), making the encoding and decoding tasks go through the roof if done in software. Getting to e.g. 56Kbaud of the end-of-the-road phone modem is impossible - 56Kbaud only worked when the phone company digitized the phone audio, and rather iffy even then. Ref: http://en.wikipedia.org/wiki/Modem#Using_digital_lines_and_PCM_.28V.90.2F92.29 http://en.wikipedia.org/wiki/Modem#Using_digital_lines_and_P...