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SDR PHY vs Calypso¶
What's so special about SDR?¶
- General purpose hardware
- i.e. not limited to any particular technology and/or protocol stack,
- could be used as PHY for GSM, LTE, IEE802.11, GPS, Bluetooth, etc.
- Becomes cheap and available for everyone
- e.g. RTL-SDR, LimeSDR-Mini
- Becomes even smaller than a credit card
- e.g. XTRX
- Open Source friendly
- GNU Radio, GQRX, OpenBTS, OsmoTRX, srsLTE, etc.
- some drivers, firmware and PCB schematics are available
Advantages over Calypso¶
- No need to rely on a 'black box' DSP
- No hardware availability problem
- No reverse engineering required
- No freq. band limitations
Disadvantages¶
- Low output power
- General purpose hardware
- No screen, no keyboard,
- No built-in SIM reader,
- No built-in audio
- etc.
What is it for?¶
- Another hardware platform for OsmocomBB
- 100% Open Source GSM L1 implementation
- GSM TS 05.02 scheduling
- GSM TS 05.03 channel coding
- GSM TS 05.04 (de)modulation
- GSM TS 05.10 synchronization
Updated by ptrkrysik over 5 years ago · 2 revisions