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