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Sledeće karakteristike su predviđene za DVB-T2 standard:
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* COFDM modulation with QPSK, 16-QAM, 64-QAM, or 256-QAM (but not 128-QAM) constellations.
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* OFDM modes are 1k, 2k, 4k, 8k, 16k, and 32k. The symbol length for 32k mode is about 4 ms.
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* Guard intervals are 1/128, 1/32, 1/16, 19/256, 1/8, 19/128, and 1/4. (For 32k mode, the maximum is 1/8.)
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* FEC is LDPC and BCH (as in DVB-S2), with rates 1/2, 3/5, 2/3, 3/4, 4/5, and 5/6.
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* There are fewer pilots, in 8 different pilot-patterns, and equalization can be based also on the RAI CD3 system.
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* In the 32k mode, a larger part of the standard 8 MHz channel can be used, adding about 2% extra capacity.
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* DVB-T2 is specified for 1.7, 5, 6, 7, 8, and 10 MHz channel bandwidth.
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* MISO (Multiple-Input Single-Output) may be used (Siavash Alamouti scheme), but MIMO will not be used. Diversity receivers can be used (as they are with DVB-T).
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* Bundling of more channels into a SuperMUX (called TFS) is not in the standard, but may be added later.
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Na primer, u UK MFN DVB-T profil (64-QAM, 2k mode, coding rate 2/3, guard interval 1/32) i ekvivalentni DVB-T2 profil (256-QAM, 32k, coding rate 3/5, guard interval 1/128) omogućavaju povećanje protoka sa 24.13 Mbit/s na 35.4 Mbit/s (+46.5%). Još jedan primer, u Italiji SFN DVB-T profil (64-QAM, 8k, coding rate 2/3, guard interval 1/4) i ekvavilentni DVB-T2 profil (256-QAM, 32k, coding rate 3/5, guard interval 1/16), omogućavaju povećanje protoka sa 19.91 Mbit/s na 33.3 Mbit/s (+67%).
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wikipedia
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