Free all radios for great justice!

GNU radio is a free software toolkit for building and deploying software radios; for learning about DSP and communication systems; for creating new kinds of radios, modulations, protocols, development environments; regulatory hacking; exploring.

I'm in it especially for the new kinds of modulations, by the way.


Software radio is:  Get the software close to the antenna; turn hardware problems into software problems; defines the waveforms transmitted; demodulates the waveforms received.

The equipment is off-the-shelf hardware.  Conventional radio stuff?  Spectrum monitoring?  Multi channel, mode, morph on the fly, better spectrum utilization, cognitive radio.

With a software model, you have one RF frontend and you suck down an entire spectrum of broadband; it lets you do distributed, parallel multiprocessing of an entire range of frequencies.

AI!  Smart radio detection.

What kind of hardware?  Narrow:  Soundblaster, narrow band RF front end (NFM, USB/LSB, AM, ...); audio output from receiver (packet, PSK31, ...); sub 50 kilohertz.  Wide band: high speed A/D (20M+ samples/sec), wide band RF front end (TV tuner).

[time passes]

Politics: MPAA / CPTWG / BPDG "Broadcast Flag".  FCC software radio in general; FCC free software radio.

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