Efficient use of frequencies in terrestrial ISDB system

Author

Nakahara, S. ; Moriyama, S. ; Kuroda, T. ; Sasaki, M. ; Yamazaki, S. ; Yamada, O.

Author_Institution

NHK Sci. & Tech. Res. Labs., Tokyo, Japan

Volume

42

Issue

3

fYear

1996

fDate

9/1/1996 12:00:00 AM

Firstpage

173

Lastpage

178

Abstract

Requirements for a terrestrial ISDB system and the schemes for efficiently using frequencies to fulfil the requirements are discussed. One requirement of a terrestrial ISDB system is the efficient allocation of frequencies using a SFN (single frequency network). The SFN incorporates the great advantages of OFDM, which has excellent performance under multi-path conditions. The transmission characteristics of 64QAM-OFDM and the SFN capability using 64QAM-OFDM in the Kanto area, including the Tokyo metropolitan area, are analyzed. The results show that more than a 97% coverage ratio can be obtained even by using a single channel while the same area is covered currently by more than 30 analog channels. The other requirement is a scheme for efficiently using the available frequency band for various services. A transmission scheme concept called BST-OFDM (band segmented transmission-orthogonal frequency division multiplexing) is proposed as a transmission scheme for meeting the requirements of a terrestrial ISDB system. In the BST-OFDM scheme, data are transmitted in a number of OFDM blocks called a BST-segment, for which channel coding and modulation schemes can be independently defined to provide robustness in the transmission environment according to stationary, portable and mobile reception

Keywords

channel coding; data communication; digital radio; encoding; frequency allocation; frequency division multiplexing; quadrature amplitude modulation; radio broadcasting; telecommunication channels; voice communication; 64QAM-OFDM; BST-OFDM; BST-segment; Kanto area; OFDM; SFN; Tokyo metropolitan area; band segmented transmission-orthogonal frequency division multiplexing; channel coding; coverage; digital broadcasting; frequency band; integrated services digital broadcasting; mobile reception; modulation scheme; multi-path conditions; portable reception; robustness; single frequency network; stationary reception; terrestrial ISDB system; transmission characteristics; transmission scheme concept; Channel coding; Communication standards; Data communication; Digital multimedia broadcasting; Frequency division multiplexing; Modulation coding; OFDM modulation; Radio spectrum management; Robustness; Urban areas;

fLanguage

English

Journal_Title

Broadcasting, IEEE Transactions on

Publisher

ieee

ISSN

0018-9316

Type

jour

DOI

10.1109/11.536577

Filename

536577