DVB S2

DVB-S2, or Second Generation Digital Video Broadcasting, is the the successor for the popular and widely used DVB-S.

Key improved features from the original DVB-S are:

  • The coding scheme is a powerful LDPC code. Chosen because of its low encoding complexity they have a special structure, known as Irregular Repeat-Accumulate Codes.
  • VCM & ACM (Variable & Adaptive coding and Modulation) modes. This fully allows optimisation to the bandwidth by changing the transmission parameter dynamically.
  • Enhanced modulation scheme up to 32APSK
  • Backward Compatibility

DVB S2 achieves significantly better performance than all predecessors.

Typical DVB Tuner

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Input Interface

Modes

FEC

Modulation

Modulation Schemes

Interleaving

Pilots

DVB-S

Single Transport Stream (TS)

Constant Coding

Reed-Solomon (RS)

Single-Carrier QPSK

BPSK, QPSK, 8PSK, 16QAM

Bit-Interleaving

N/A

DVB-S2

Multiple Transport Stream and GSE

Variable and Adaptive Coding and Modulation

LDPC + BCH

Single-Carrier QPSK with multiple streams

BPSK, QPSK, 8PSK, 16QAM, 32APSK

Bit-Interleaving

Pilot Symbols

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