Paper Abstract and Keywords |
Presentation |
2004-09-17 11:15
On Quasi-Cyclic LDPC Codes Based on Cyclic Difference Families Masaya Fujisawa, Takashi Kimura (Tokyo Univ. of Science), Shojiro Sakata (Univ. of Electro-Comm.) |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
We present a method for constructing regular low-density
parity-check (LDPC) codes based on cyclic difference families,
which are a special type of balance incomplete block designs.
These codes have a quasi-cyclic structure,
which allows low complexity encoding
with simple feedback shift registers,
and have girth more than 4.
However, there always exist 6-cycles in partial circulant matrices.
We propose a method for reducing or avoiding of 6-cycles.
The resulting codes still preserve quasi-cyclic structure. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
LDPC code / combinatorial design / difference family / quasi-cyclic code / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 104, no. 302, IT2004-41, pp. 19-24, Sept. 2004. |
Paper # |
IT2004-41 |
Date of Issue |
2004-09-09 (IT) |
ISSN |
Print edition: ISSN 0913-5685 |
Download PDF |
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Conference Information |
Committee |
IT |
Conference Date |
2004-09-16 - 2004-09-17 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Osaka Sangyo Univ. |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
general |
Paper Information |
Registration To |
IT |
Conference Code |
2004-09-IT |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
On Quasi-Cyclic LDPC Codes Based on Cyclic Difference Families |
Sub Title (in English) |
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Keyword(1) |
LDPC code |
Keyword(2) |
combinatorial design |
Keyword(3) |
difference family |
Keyword(4) |
quasi-cyclic code |
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1st Author's Name |
Masaya Fujisawa |
1st Author's Affiliation |
Tokyo University of Science (Tokyo Univ. of Science) |
2nd Author's Name |
Takashi Kimura |
2nd Author's Affiliation |
Tokyo University of Science (Tokyo Univ. of Science) |
3rd Author's Name |
Shojiro Sakata |
3rd Author's Affiliation |
University of Electro-Communications (Univ. of Electro-Comm.) |
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Speaker |
Author-1 |
Date Time |
2004-09-17 11:15:00 |
Presentation Time |
25 minutes |
Registration for |
IT |
Paper # |
IT2004-41 |
Volume (vol) |
vol.104 |
Number (no) |
no.302 |
Page |
pp.19-24 |
#Pages |
6 |
Date of Issue |
2004-09-09 (IT) |