Title:
METHOD AND SYSTEM FOR PROVIDING PARITY CHECK (LDPC) CODE HAVING LOW DENSITY OF SHORT BLOCK LENGTH
Document Type and Number:
Japanese Patent JP3917617
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an approach generating a parity check (LDPC) code having a low density.
SOLUTION: A short LDPC code is generated by shortening a longer mother code by an LDPC encoder (203). The short LDPC code has an outer Bose Chaudhuri Hocqenghem (BCH) code. The bit of an output LDPC code is interleaved, by writing data related in the LDPC-code row direction serially to a table by an interleaver and reading the data in serial in the line direction from the right to the left to the LDPC code, having a code rate of 3/5 using a 8-PSK from another viewpoint. The approach has a specific applications in digital video broadcast service through a satellite.
Inventors:
Mustafa Eros
Fen-Wen Sun
Lin-Nan Lee
Fen-Wen Sun
Lin-Nan Lee
Application Number:
JP2004258552A
Publication Date:
May 23, 2007
Filing Date:
September 06, 2004
Export Citation:
Assignee:
The DIRECTV Group, Inc.
International Classes:
G06F11/10; H03M13/19; G06F11/00; G08C25/00; H03M13/00; H03M13/03; H03M13/11; H03M13/15; H03M13/27; H04B1/00; H04L1/00; H04L25/49; H04L27/18; H04N7/20; (IPC1-7): H03M13/19; G06F11/10; H03M13/27; H04L1/00
Domestic Patent References:
| JP2001345716A |
Other References:
贄田里詩 他,確率伝搬型復号法に適した低密度パリティ検査符号,電子情報通信学会技術研究報告(IT2003-32),日本,社団法人電子情報通信学会,2003年 7月23日,Vol.103 No.215,pp.51-56
Stephane Y. Le Goff,Signal Constellations for Bit-Interleaved Coded Modulation,IEEE TRANSACTIONS ON INFORMATION THEORY,米国,IEEE,2003年 1月,VOL.49 NO.1,pp.307-313
Tadashi WADAYAMA,,A Coded Modulation Scheme Based on Low Density Parity Check Codes,IEICE Transactions on Fundamentals,日本,社団法人電子情報通信学会,2001年10月,Vol.E84-A,pp.2523-2527
Stephane Y. Le Goff,Signal Constellations for Bit-Interleaved Coded Modulation,IEEE TRANSACTIONS ON INFORMATION THEORY,米国,IEEE,2003年 1月,VOL.49 NO.1,pp.307-313
Tadashi WADAYAMA,,A Coded Modulation Scheme Based on Low Density Parity Check Codes,IEICE Transactions on Fundamentals,日本,社団法人電子情報通信学会,2001年10月,Vol.E84-A,pp.2523-2527
Attorney, Agent or Firm:
Takehiko Suzue
Satoshi Kono
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Sadao Muramatsu
Ryo Hashimoto
Satoshi Kono
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Sadao Muramatsu
Ryo Hashimoto
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