#gnuradio — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #gnuradio, aggregated by home.social.
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I've just tested the principle of #SSB processing using Controlled-Envelope Single-Sideband modulation (CESSB) in #GNURadio and it is beyond beautiful.
It uses a two stage process of clipping and peak stretching that combined can reduce the effects of over modulation typically introduced by #agc
Even extremely overmodulated input signals (25x) still produce clean audio indistinguishable from the original source signal.
Paper:
https://www.arrl.org/files/file/QEX_Next_Issue/2014/Nov-Dec_2014/Hershberger_QEX_11_14.pdf -
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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I was able to reconnect with #hams from #maryland and people I met at #hamsci, #cedar, #hamvention and #gnuradio conferences. Some folx I haven't seen since the #pandemic! It was good to be out and about. Everyone was cool but no one who was still working wanted their photos shared on #socialmedia because they were concerned about security issues and fear of a #facist planet. This is what it has come down to. SMH 4/4
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HackRF + GNU Radio = WBFM Transmitter
Продолжаю цикл статей посвященных легендарному HackRF. В этом материале я хотел бы разобрать изнанку GNU Radio и описать широкими мазками то, каким образом оно устроено под капотом и сделать какой-нибудь минимально интересный проект с его использованием. Для себя я выбрал простую передачу аудиосигнала с микрофона с одного HackRF на другой через коаксиальный кабель с использованием OFDM-модуляции. Посмотрим на созвездия, спектр, принимаемый сигнал во времени и по частотам. Добро пожаловать под кат, будет интересно! 🙂
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Learning SDR and DSP Hack Chat - Join us on Wednesday, November 11th at noon Pacific for Learning SDR and DSP Hack Chat with Marc Lic... - https://hackaday.com/2020/11/09/learning-sdr-and-dsp-hack-chat/ #digitalsignalprocessing #software-definedradio #hackadaycolumns #gnuradio #hackchat #plutsdr #python #radio #dsp #sdr