DVB-T: the COFDM-based system for terrestrial television

Author

Reimers, U.

Author_Institution

Inst. fur Nachrichtentech., Tech. Univ. Braunschweig, Germany

Volume

9

Issue

1

fYear

1997

fDate

2/1/1997 12:00:00 AM

Firstpage

28

Lastpage

32

Abstract

In early 1996, the European DVB (Digital Video Broadcasting) Project finalised what is now called the `common 2k/8k specification´ for terrestrial television transmission. This specification is an important cornerstone of digital video broadcasting in Europe and numerous other countries in the world. Called DVB-T, it is based on the channel-coding algorithms the DVB Project had earlier devised for digital television on cable and satellite. The modulation scheme that is used for DVB-T is OFDM (orthogonal frequency division multiplexing), which when used in conjunction with channel coding is known as COFDM. Two variants are described, one employing 1705 individual carriers in an 8 MHz channel (`2k variant´), the other employing 6817 carriers (`8k variant´). Each individual carrier can be modulated either by QPSK, 16-QAM, 64-QAM or hierarchical modulation

Keywords

channel coding; digital television; frequency division multiplexing; quadrature amplitude modulation; quadrature phase shift keying; television broadcasting; 16-QAM; 64-QAM; 8 MHz; COFDM based system; DVB-T; Digital Video Broadcasting; Europe; European DVB Project; OFDM; QPSK; cable TV; carrier modulation; channel coding algorithms; common 2k/8k specification; digital television; hierarchical modulation; orthogonal frequency division multiplexing; satellite TV; terrestrial television transmission;

fLanguage

English

Journal_Title

Electronics & Communication Engineering Journal

Publisher

iet

ISSN

0954-0695

Type

jour

DOI

10.1049/ecej:19970105

Filename

581222