SDR PHY vs Calypso » History » Version 1
ptrkrysik, 09/06/2018 09:17 AM
| 1 | 1 | ptrkrysik | h1. SDR PHY vs Calypso |
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| 2 | |||
| 3 | h2. What's so special about SDR? |
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| 4 | |||
| 5 | * General purpose hardware |
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| 6 | ** i.e. not limited to any particular technology and/or protocol stack, |
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| 7 | ** could be used as PHY for GSM, LTE, IEE802.11, GPS, Bluetooth, etc. |
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| 8 | * Becomes cheap and available for everyone |
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| 9 | ** e.g. RTL-SDR, LimeSDR-Mini |
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| 10 | * Becomes even smaller than a credit card |
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| 11 | ** e.g. XTRX |
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| 12 | * Open Source friendly |
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| 13 | ** GNU Radio, GQRX, OpenBTS, OsmoTRX, srsLTE, etc. |
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| 14 | ** some drivers, firmware and PCB schematics are available |
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| 15 | |||
| 16 | h2. Advantages over Calypso |
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| 17 | |||
| 18 | * No need to rely on a 'black box' DSP |
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| 19 | * No hardware availability problem |
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| 20 | * No reverse engineering required |
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| 21 | * No freq. band limitations |
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| 22 | |||
| 23 | h2. Disadvantages |
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| 24 | |||
| 25 | * Low output power |
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| 26 | * General purpose hardware |
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| 27 | ** No screen, no keyboard, |
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| 28 | ** No built-in SIM reader, |
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| 29 | ** No built-in audio |
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| 30 | ** etc. |
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| 31 | |||
| 32 | h2. What is it for? |
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| 33 | |||
| 34 | * Another hardware platform for [[OsmocomBB]] |
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| 35 | * 100% Open Source GSM L1 implementation |
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| 36 | ** GSM TS 05.02 scheduling |
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| 37 | ** GSM TS 05.03 channel coding |
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| 38 | ** GSM TS 05.04 (de)modulation |
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| 39 | ** GSM TS 05.10 synchronization |
