Dvb-s2

• DVB-S2 combines DVB-S (intented for final consumers ) with DVB-DSNG (used by professionals),
• Adaptative coding to optimize the use of satellite transponders.
• 4 modulation modes are available : QPSK, 8PSK (used in non-linear transponders near to saturation); 16APSK and 32APSK (for professional, semi-linear aplicatons).
• Improved rolloff: α = 0.20 and α = 0.25 in adition to the DVB-S α = 0.35.
• Forward error correction: DVB-S2 uses a FEC system based on concatenation of the Bose-Chaudhuri-Hochquenghem code with a low density parity check. Performance should be 0.7 dB close to the Shannon limit.
• Cheap to implement.

External link

• DVB-S2 white paper (final)

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