DVBS2

Overview

Key Features

•  A flexible input stream adapter, suitable for operation with single and multiple input streams of various formats (packetized or    continuous)
•  A powerful FEC system based on low-density parity check (LDPC) codes concatenated with BCH codes, allowing quasi-error-free    operation at approx. 0.7 dB to 1 dB from the Shannon limit, depending on the transmission mode
•  A wide range of code rates from 1/4 up to 9/10
•  Four constellations (QPSK, 8PSK, 16APSK, 32APSK), ranging in spectrum efficiency from 2 bit/s/Hz to 5 bit/s/Hz, optimized for    operation over non-linear transponders
•  A set of three spectrum shapes with roll-off factors of 0.35, 0.25 and 0.20
•  Variable coding and modulation (VCM) may be applied in order to provide different levels of error protection to different service    components (e.g. SDTV and HDTV, audio, multimedia)
•  In the case of interactive and point-to-point applications, the VCM functionality may be combined with the use of return channels to    achieve adaptive coding and modulation (ACM). This methods provides the best-suited channel protection and dynamic link adaptation    to  propagation conditions, targeting each individual receiving terminal

Block Diagram

Applications

•  DVB‑S2 is intended to provide Direct‑To‑Home (DTH) services for consumer Integrated Receiver Decoder (IRD), as well as collective    antenna systems (Satellite Master Antenna Television ‑ SMATV) and cable television headend stations
• DVB-S2 includes provision for Digital TV Contribution and Satellite News Gathering (DTVC/DSNG) applications by satellite, consisting of point to point or point to multipoint transmissions, connecting fixed or transportable uplink and receiving stations

Technical Specifications