#gnuradio — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #gnuradio, aggregated by home.social.
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Contributed my first patches to the amazing vrt-iq-tools:
https://github.com/tftelkamp/vrt-iq-tools
With these you can stream IQ sampling data from SDRs over the network, supporting many interesting use cases. Including multiple concurrent users, integration with GNURadio, conversion to a Soapy device and even things like a correlator.
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Here is a video comparing SSB and FM transmission with and without audio companding. Audio compression actually lowers the SSB single tone output power by about 6-7 dB, but the compressed audio seems more readable across a wider audio range.
Compressor adjustment methodology: a test audio file with normalized audio to -1.0f - 1.0f interval (highest peak at 1.0f), played on a virtual Pulseaudio sink with the play command.