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h1. SDR

http://en.wikipedia.org/wiki/Software-defined_radio

ARCEP fréquences & misc : Issue #53

h2. Matériel

* http://en.wikipedia.org/wiki/Universal_Software_Radio_Peripheral
* http://gnuradio.org
* http://sdr.osmocom.org/trac/wiki/rtl-sdr
** Then by accident I found the rtl-sdr software radio project. Long story short is that a $20 USB dongle designed for receiving digital TV can also be used as a wideband receiver from 64Mhz to over 1.6GHz. Yes it works on Linux too.
** http://www.reddit.com/r/RTLSDR/
** http://shop.sysmocom.de/products/tv28t-bulk
* funcube http://www.funcubedongle.com/
** http://lordepsylon.net/sats.php
** http://www.cqdx.ru/ham/new-equipment/hf-converter-kit-for-funcube-dongle-sdr/ (funcube HF converter -> enlarge funcube bandwidth from DC to 1700MHz !)
* http://croatia-microwave.blogspot.com/2011/05/24-ghz-transverter-conquering-last-cm.html
* http://swling.com/db/software-defined-sdr/ (shortwave receivers)
* http://www.websdr.org/ (quelques SDR en ligne)
* http://tapr.org/kits_tadd-3.html

h2. OpenRadio

http://www.stanford.edu/~skatti/
http://snsg.stanford.edu/projects/openradio-wireless-virtualization/
http://gigaom.com/broadband/openradio-changes-what-it-means-to-be-an-isp/

h2. Serval

http://www.servalproject.org/
http://developer.servalproject.org/site/docs/2011/Serval_Introduction.html
http://www.lemonde.fr/international/article/2012/04/21/le-logiciel-de-telephonie-mobile-qui-defie-le-controle-des-etats_1688852_3210.html

h2. Village Telco

http://villagetelco.org/

h2. Codec

codec2 voice codec ham radio http://www.youtube.com/watch?v=7y6CHpMauHw&feature=relmfu
http://www.rowetel.com/blog/

opus codec http://www.youtube.com/watch?v=iaAD71h9gDU&feature=relmfu