WikiStart » History » Version 17
ahuemer, 02/19/2016 10:50 PM
Add description of 38C3 presentation
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| 2 | 17 | ahuemer | h1. GEO Mobile Radio |
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| 5 | 17 | ahuemer | This is the homepage of the Osmocom sub-project _GEO Mobile Radio_. |
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| 7 | It is collecting information and software related to the ETSI GEO Mobile Radio specification and its practical implementations like the [[Thuraya]] satellite phone network |
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| 9 | 1 | GEO Mobile Radio is a set of specifications describing a satellite based mobile phone network. |
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| 11 | [[BlogList(format=float,recent=5,max_size=350)]] |
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| 14 | 17 | ahuemer | h2. Radio aspects |
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| 17 | 1 | It uses the L-band frequencies 1634 to 1656 MHz (earth to space) and 1532.5 to 1554.5 MHz (space to earth) for communication |
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| 18 | between mobile phones and the respective satellites. The polarization is circular (left) and the modulation is pi/4 QPSK, using |
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| 19 | a channel spacing of 31.25 kHz |
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| 22 | 17 | ahuemer | h2. Index |
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| 24 | 17 | ahuemer | * [[GMR_Specifications]] -- An Introduction and Overview into the GMR specifications |
| 25 | ** [[SpeechCodec]] -- The voice codec |
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| 26 | ** [[A5-GMR-1]] -- The cipher |
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| 27 | * Devices: |
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| 28 | ** [[Thuraya_SO2510]] -- A popular handset for use in the [[Thuraya]] system. |
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| 29 | ** [[Thuraya_SG2520]] -- A dual-mode GSM/ [[Thuraya]] handset running [[WindowsCE]]. |
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| 30 | * [[Thuraya_Beams]] -- Information about the Thuraya beams |
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| 31 | ** "-- Google Maps view of the Thuraya beams that we have found so far |
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| 32 | * [[OsmoGMR_Software"httpbitlynInTOi]] -- Software that we wrote for GMR analysis |
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| 33 | ** [[GettingStarted]] -- A small guide to get you going |
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| 34 | ** "Browse code":http://cgit.osmocom.org/cgit/osmo-gmr/ -- Browse the [[OsmocomGMR]] source code |
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| 35 | * [[Receiver_Setup]] -- How to receive GMR signals coming down from a satellite |
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| 36 | 7 | laforge | |
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| 38 | 17 | ahuemer | h2. Presentations |
| 39 | 6 | laforge | |
| 40 | 17 | ahuemer | * 28C3 talk by Sylvain |
| 41 | ** Description: https://events.ccc.de/congress/2011/Fahrplan/events/4688.en.html |
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| 42 | ** Video: http://media.ccc.de/browse/congress/2011/28c3-4688-en-introducing_osmo_gmr.html |
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| 43 | ** Slides: http://events.ccc.de/congress/2011/Fahrplan/attachments/2027_28c3_introducing_osmocom_gmr.pdf |
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| 45 | * Recording of a "Wireless Hacking: GMR-1 / Thuraya" talk by Sylvain Munaut in the Moscow hackerspace Neuron. |
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| 46 | ** Video: http://www.youtube.com/watch?v=IpZPamI2vTk |
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| 48 | * 31C3 talk by Sylvain |
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| 49 | ** Description: https://events.ccc.de/congress/2014/Fahrplan/events/6267.html |
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| 50 | ** Video: http://media.ccc.de/browse/congress/2014/31c3_-_6267_-_en_-_saal_g_-_201412271600_-_osmo-gmr_what_s_up_with_sat-phones_-_sylvain_munaut.html |
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| 51 | ** Slides: https://events.ccc.de/congress/2014/Fahrplan/system/attachments/2496/original/31c3_gmr.pdf |
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| 54 | h2. Community |
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| 57 | * IRC: #osmocom on [[FreeNode]] |
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| 58 | * Mailing list : http://lists.osmocom.org/mailman/listinfo/gmr |
