| Project/Area Number |
22560363
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Communication/Network engineering
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
SAKANIWA Kohichi 東京工業大学, 大学院・理工学研究科, 教授 (30114870)
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| Co-Investigator(Kenkyū-buntansha) |
KASAI Kenta 東京工業大学, 理工学研究科, 准教授 (70431997)
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| Project Period (FY) |
2010 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2011: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2010: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 符号化 / LDPC 符号 / マルチエッジ型 / 重み分布の対称性 / LDPC / 高性能アンサンブル / 密度発展法 / LDPC符号 / 非正則LDPC符号 |
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| Research Abstract |
We considered in this research the multi-edge type irregular LDPC (Low-Density Parity-Check) codes, a very general class of LDPC codes, and obtained the following results. We first clarified a fundamental property that codeword weight distribution has so-called symmetry property which is preserved for the concatenation of base Tanner graphs. Using this fundamental property, we could systematically derive codeword weight distributions for multi-edge type LDPC code ensembles. We could then find several useful and high performance multi-edge type LDPC code ensembles.
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