WikiStart » History » Version 11
laforge, 02/19/2016 10:50 PM
| 1 | 2 | laforge | = GEO Mobile Radio = |
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| 3 | 2 | laforge | This is the homepage of the Osmocom sub-project ''GEO Mobile Radio''. |
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| 5 | 2 | laforge | It is collecting information and software related to the ETSI GEO Mobile Radio specification and its practical implementations like the [wiki:Thuraya] satellite phone network |
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| 7 | 2 | laforge | GEO Mobile Radio is a set of specifications describing a satellite based mobile phone network. |
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| 9 | 11 | laforge | [[BlogList(format=float,recent=5,max_size=350)]] |
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| 11 | 3 | laforge | == Radio aspects == |
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| 13 | 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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| 14 | between mobile phones and the respective satellites. The polarization is circular (left) and the modulation is pi/4 QPSK, using |
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| 15 | a channel spacing of 31.25 kHz |
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| 16 | |||
| 17 | == Index == |
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| 18 | 2 | laforge | * [wiki:GMR_Specifications] -- An Introduction and Overview into the GMR specifications |
| 19 | 8 | * Devices: |
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| 20 | * [wiki:Thuraya_SO2510] -- A popular handset for use in the [wiki:Thuraya] system. |
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| 21 | * [wiki:Thuraya_SG2520] -- A dual-mode GSM/ [wiki:Thuraya] handset running WindowsCE. |
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| 22 | 7 | laforge | * [wiki:Thuraya_Beams] -- Information about the Thuraya beams |
| 23 | 1 | * [http://bit.ly/nInTOi] -- Google Maps view of the Thuraya beams that we have found so far |
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| 24 | 7 | laforge | * [wiki:OsmoGMR_Software] -- Software that we wrote for GMR analysis |
| 25 | 8 | * [wiki:GettingStarted] -- A small guide to get you going |
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| 26 | 9 | steve-m | * [http://cgit.osmocom.org/cgit/osmo-gmr/ Browse code] -- Browse the OsmocomGMR source code |
| 27 | 6 | laforge | * [wiki:Receiver_Setup] -- How to receive GMR signals coming down from a satellite |
| 28 | 10 | laforge | |
| 29 | == Presentations == |
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| 30 | * 28C3 talk by Sylvain |
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| 31 | * Video: http://mirror.fem-net.de/CCC/28C3/mp4-h264-HQ/28c3-4688-en-introducing_osmo_gmr_h264.mp4 |
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| 32 | * Slides: http://events.ccc.de/congress/2011/Fahrplan/attachments/2027_28c3_introducing_osmocom_gmr.pdf |
