• Document: Next-Generation Digital Television Terrestrial Broadcasting Systems
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RESEARCH & DEVELOPMENT TELECOMMUNICATIONS INSTITUTE Next-Generation Digital Television Terrestrial Broadcasting Systems Author: Eng. Ernesto Fontes Pupo. 11/08/2016 Mail: fontes@lacetel.cu RESEARCH & DEVELOPMENT TELECOMMUNICATIONS INSTITUTE Outline • Introduction • Brief review of the first-generation DTTB standards • Current status of the second-generation DTTB systems • Technical challenges at 2013 • State of the Art - Technological Advances • Next-Generation: NGB-W (China)/ ATSC 3.0 (USA) • Conclusions 2 RESEARCH & DEVELOPMENT TELECOMMUNICATIONS INSTITUTE Introduction “The future of television is to stop thinking of television as television.” - 1985 Nicholas Negroponte 3 RESEARCH & DEVELOPMENT TELECOMMUNICATIONS INSTITUTE Introduction Internet TVD + 20 year of evolution Technological Evolution 4 RESEARCH & DEVELOPMENT TELECOMMUNICATIONS INSTITUTE Evolution of the DTTB standards First-generation 1995 1997 1999 2006 ATSC DVB-T ISDB-T DTMB Second-generation 2009 2010 2015 DVB-T2 ATSC-M/H ISDB-Tmm DTMB-A Next-generation 5 RESEARCH & DEVELOPMENT TELECOMMUNICATIONS INSTITUTE World Distribution DVB-T DVB-T2 ATSC ISDB-T DTMB 6 RESEARCH & DEVELOPMENT TELECOMMUNICATIONS INSTITUTE Technical challenges at 2013 OFDM-Based tx Mod. & CH coding MIMO • C-OFDM • higher order mod. • large-scale MIMO • TDS-OFDM Schemes (QAM) • low-complexity − UW-OFDM − 512, 1024, + implementation − DPN-OFDM • Constell. rotation algorithms − TFT-OFDM • coded modulation − Ant. placement − Signal detection  PAPR reduction technology algorithms − BICM − channel • Shannon limit estimation 7 RESEARCH & DEVELOPMENT TELECOMMUNICATIONS INSTITUTE Technical challenges at 2013 Return Channel Wireless localizat. Multi-service • DVB-RCT (60 km) • GNSS, GPS • Fixed and mobile Rx − OFDMA(↑PARP) − accuracy: 3–10m − Power − SC-FDMA • DTTB-based consumption (↓PARP) − accuracy: ↓1m • T/FDM (DVB-T2) − TDS-FDMA  Rx is located near • BST-OFDM (ISDB- • WLAN or 2G/3G one particular Tx Tmm)  non-line-of-sight • layered super-frame • Convergence of structure/TDM GPS- and DTTB (DTMB) 8 RESEARCH & DEVELOPMENT TELECOMMUNICATIONS INSTITUTE What about now? 9 RESEARCH & DEVELOPMENT TELECOMMUNICATIONS INSTITUTE Non-Uniform Constellation (NUC) 1 Dimension v • more than 1dB gain respect to a system 1k QAM 4k QAM which uses UC. 2 Dimension v 64 condensed points 10 RESEARCH & DEVELOPMENT TELECOMMUNICATIONS INSTITUTE 11 RESEARCH & DEVELOPMENT TELECOMMUNICATIONS INSTITUTE 12 RESEARCH & DEVELOPMENT TELECOMMUNICATIONS INSTITUTE Layered Division Multiplexing (LDM) QPSK UL (UL) (LL) LL LDM NUC 256 QAM 13 RESEARCH & DEVELOPMENT TELECOMMUNICATIONS INSTITUTE Actual System LDM LDM future 14 RESEARCH & DEVELOPMENT TELECOMMUNICATIONS INSTITUTE NGB-WChannel vs DVB-T2 (Channel Capacity) Capacity(6MHz)( Link BICM Efficiency (bit/s/Hz) Next-Gen. DVB-T2 C= 66 Mbps C= 1.98 Mbps

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