Title:
低密度のパリティチェックコードを使用する衛星通信システム
Document Type and Number:
Japanese Patent JP3990323
Kind Code:
B2
Abstract:
An approach for reliably communicating over a satellite (111) in support of a communication service including, for example, as direct broadcast satellite and data service, is disclosed. An input message is encoded, yielding a structured Low Density Parity Check (LDPC) coded message. The coded message is modulated according to a high order modulation scheme that has a signal constellation representing more than two symbols per signaling point-e.g., 8-PSK (Phase Shift Keying) and 16-QAM (Quadrature Amplitude Modulation). The system includes a transmitter (200) configured to propagate the modulated signal over the satellite (111). The above approach is particularly applicable to bandwidth constrained communication systems requiring high data rates.
Inventors:
Mustafa Eros
Phen-Wen Seung
Lynn-Nan Lee
Daniel Flurry Jr.
Phen-Wen Seung
Lynn-Nan Lee
Daniel Flurry Jr.
Application Number:
JP2003176331A
Publication Date:
October 10, 2007
Filing Date:
June 20, 2003
Export Citation:
Assignee:
Hughes Electronics Corporation
International Classes:
H03M13/25; H03K7/06; H03K9/06; H03M13/09; H03M13/11; H03M13/19; H03M13/29; H04B7/185; H04B7/208; H04L1/00; H04L27/18; H04L27/20; H04L27/34; H04L27/36; H04Q7/00; H03M13/15; H04H40/90
Domestic Patent References:
| JP2002094405A |
Other References:
Tadashi WADAYAMA,A Coded Modulation Scheme Based on Low Density Parity Check Codes,IEICE Transactions on Fundamentals,米国,2001年10月,Vol.E84-A,pp.2523-2527
和田山 正,低密度パリティ検査符号とその復号法,日本,株式会社トリケップス,2002年 6月 5日,pp.123-131
和田山 正,低密度パリティ検査符号とその復号法,日本,株式会社トリケップス,2002年 6月 5日,pp.123-131
Attorney, Agent or Firm:
Takehiko Suzue
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Ryo Hashimoto
Tetsuya Kazama
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Ryo Hashimoto
Tetsuya Kazama