A hierarchical modulation for upgrading digital broadcast systems

Author

Jiang, Hong ; Wilford, Paul A.

Author_Institution

Lucent Technol. Bell Labs., Murray Hill, NJ, USA

Volume

51

Issue

2

fYear

2005

fDate

6/1/2005 12:00:00 AM

Firstpage

223

Lastpage

229

Abstract

A hierarchical modulation scheme is proposed to upgrade an existing digital broadcast system, such as satellite TV, or satellite radio, by adding more data in its transmission. The hierarchical modulation consists of a basic constellation, which is the same as in the original system, and a secondary constellation, which carries the additional data for the upgraded system. The upgraded system with the hierarchical modulation is backward compatible in the sense that receivers that have been deployed in the original system can continue receiving data in the basic constellation. New receivers can be designed to receive data carried in the secondary constellation, as well as those in the basic constellation. Analysis will be performed to show the tradeoff between bit rate of the data in secondary constellation and the penalty to the performance of receiving the basic constellation.

Keywords

channel coding; digital video broadcasting; iterative decoding; modulation coding; quadrature amplitude modulation; quadrature phase shift keying; receivers; television receivers; QAM; QPSK; backward compatibility; bit rate; constellation mapping; digital broadcast system upgrade; hierarchical modulation scheme; iterative decoding; local repeater; penalty analysis; quadrature amplitude modulation; quadrature phase shift keying; receiver design; Bit rate; Digital modulation; Error correction codes; Iterative algorithms; Iterative decoding; Modulation coding; Quadrature phase shift keying; Radio broadcasting; Satellite broadcasting; TV broadcasting; Backward compatibility; QAM; QPSK; bit rate; constellation mapping; digital broadcast; hierarchical modulation; iterative decoding; local repeaters; penalty analysis; receiver design; system upgrade;

fLanguage

English

Journal_Title

Broadcasting, IEEE Transactions on

Publisher

ieee

ISSN

0018-9316

Type

jour

DOI

10.1109/TBC.2005.847619

Filename

1433080