Kenta KASAI


Sparse Graph Codes for Channels with Synchronous Errors
Ryohei GOTO Kenta KASAI 
Publication:   
Publication Date: 2018/12/01
Vol. E101-A  No. 12  pp. 2064-2071
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Coding theory and techniques
Keyword: 
synchronous errorssynchronous errors
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Message Passing Decoder with Decoding on Zigzag Cycles for Non-binary LDPC Codes
Takayuki NOZAKI Kenta KASAI Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2014/04/01
Vol. E97-A  No. 4  pp. 975-984
Type of Manuscript:  PAPER
Category: Coding Theory
Keyword: 
non-binary LDPC codeerror floormemoryless binary-input output-symmetricbelief propagation decodermaximum a posteriori decoding
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Weight Distribution for Non-binary Cluster LDPC Code Ensemble
Takayuki NOZAKI Masaki MAEHARA Kenta KASAI Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2013/12/01
Vol. E96-A  No. 12  pp. 2382-2390
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Coding Theory
Keyword: 
non-binary cluster LDPC codeweight distributionexponential growth rate
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Simple Nonbinary Coding Strategy for Very Noisy Relay Channels
Puripong SUTHISOPAPAN Kenta KASAI Anupap MEESOMBOON Virasit IMTAWIL Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2012/12/01
Vol. E95-A  No. 12  pp. 2122-2129
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Coding Theory
Keyword: 
nonbinary LDPC codemultiplicative repetitiondecode-and-forwardhalf duplex relayingrelay channelvery noisy relay channel
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Analysis of Error Floors for Non-binary LDPC Codes over General Linear Group through q-Ary Memoryless Symmetric Channels
Takayuki NOZAKI Kenta KASAI Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2012/12/01
Vol. E95-A  No. 12  pp. 2113-2121
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Coding Theory
Keyword: 
non-binary LDPC codeerror floorq-ary memoryless symmetric channelbelief propagation
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Analysis of Error Floors of Non-binary LDPC Codes over BEC
Takayuki NOZAKI Kenta KASAI Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2012/01/01
Vol. E95-A  No. 1  pp. 381-390
Type of Manuscript:  PAPER
Category: Coding Theory
Keyword: 
non-binary LDPC codeserror floorsbelief propagation
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Analysis of Error Floors of Non-binary LDPC Codes over MBIOS Channel
Takayuki NOZAKI Kenta KASAI Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/11/01
Vol. E94-A  No. 11  pp. 2144-2152
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Coding Theory
Keyword: 
non-binary LDPC codeerror floorMBIOS channel
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Analysis of Stopping Constellation Distribution for Irregular Non-binary LDPC Code Ensemble
Takayuki NOZAKI Kenta KASAI Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/11/01
Vol. E94-A  No. 11  pp. 2153-2160
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Coding Theory
Keyword: 
non-binary LDPC codesstopping constellation
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Spatially Coupled Protograph-Based LDPC Codes for Decode-and-Forward in Erasure Relay Channel
Hironori UCHIKAWA Kenta KASAI Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/11/01
Vol. E94-A  No. 11  pp. 2127-2134
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Coding Theory
Keyword: 
spatially coupled codesprotograph-based LDPC codesrelayerasure channel
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Design and Performance of Rate-Compatible Non-binary LDPC Convolutional Codes
Hironori UCHIKAWA Kenta KASAI Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/11/01
Vol. E94-A  No. 11  pp. 2135-2143
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Coding Theory
Keyword: 
non-binary LDPC codesLDPC convolutional codesrate-compatibility
 Summary | Full Text:PDF

Spatially-Coupled MacKay-Neal Codes and Hsu-Anastasopoulos Codes
Kenta KASAI Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/11/01
Vol. E94-A  No. 11  pp. 2161-2168
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Coding Theory
Keyword: 
spatial couplingLDPC codeiterative decoding
 Summary | Full Text:PDF

Weight Distributions of Non-binary LDPC Codes
Kenta KASAI Charly POULLIAT David DECLERCQ Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/04/01
Vol. E94-A  No. 4  pp. 1106-1115
Type of Manuscript:  PAPER
Category: Coding Theory
Keyword: 
non-binary low-density parity-check codeweight distributionGalois fields
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Weight Distributions of Multi-Edge Type LDPC Codes
Kenta KASAI Tomoharu AWANO David DECLERCQ Charly POULLIAT Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/11/01
Vol. E93-A  No. 11  pp. 1942-1948
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Coding Theory
Keyword: 
low-density parity-check codestructured codesweight distributions
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Fourier Domain Decoding Algorithm of Non-binary LDPC Codes for Parallel Implementation
Kenta KASAI Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/11/01
Vol. E93-A  No. 11  pp. 1949-1957
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Coding Theory
Keyword: 
LDPC codenon-binary LDPC codesbelief propagationGalois fielditerative decoding
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Detailed Evolution of Degree Distributions in Residual Graphs with Joint Degree Distributions
Takayuki NOZAKI Kenta KASAI Tomoharu SHIBUYA Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/10/01
Vol. E91-A  No. 10  pp. 2737-2744
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Coding Theory
Keyword: 
detailedly represented irregular LDPC code ensemblesevolution of degree distributions in residual graphspeeling algorithmbinary erasure channel
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Average Bit Erasure Probability of Regular LDPC Code Ensembles under MAP Decoding over BEC
Takayuki ITSUI Kenta KASAI Ryoji IKEGAYA Tomoharu SHIBUYA Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/09/01
Vol. E90-A  No. 9  pp. 1763-1771
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: 
Keyword: 
regular LDPC code ensemblea-posteriori probability decodingbinary erasure channelEXIT functionshortened information functionsupport weight distribution
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Performance of Standard Irregular LDPC Codes under Maximum Likelihood Decoding
Ryoji IKEGAYA Kenta KASAI Tomoharu SHIBUYA Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/07/01
Vol. E90-A  No. 7  pp. 1432-1443
Type of Manuscript:  PAPER
Category: Coding Theory
Keyword: 
low-density parity-check (LDPC) codemaximum-likelihood decodingstandard irregular LDPC code ensembleblock error probability
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Sufficient Conditions for a Regular LDPC Code Better than an Irregular LDPC Code
Shinya MIYAMOTO Kenta KASAI Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/02/01
Vol. E90-A  No. 2  pp. 531-534
Type of Manuscript:  LETTER
Category: Coding Theory
Keyword: 
Low-Density Parity-Check codesDensity EvolutionBECBelief PropagationBSCGallager's algorithm
 Summary | Full Text:PDF

Design of Irregular Repeat Accumulate Codes with Joint Degree Distributions
Kenta KASAI Shinya MIYAMOTO Tomoharu SHIBUYA Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/11/01
Vol. E89-A  No. 11  pp. 3351-3354
Type of Manuscript:  LETTER
Category: Coding Theory
Keyword: 
irregular repeat accumulate codesjoint degree distributioniterative decodingdensity evolutionbelief propagation
 Summary | Full Text:PDF

Average Coset Weight Distribution of Multi-Edge Type LDPC Code Ensembles
Kenta KASAI Yuji SHIMOYAMA Tomoharu SHIBUYA Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/10/01
Vol. E89-A  No. 10  pp. 2519-2525
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Coding Theory
Keyword: 
average coset weight distributionlow-density parity-check codesmulti-edge type low-density parity-check codessymmetryweight distribution
 Summary | Full Text:PDF

Weight and Stopping Set Distributions of Two-Edge Type LDPC Code Ensembles
Ryoji IKEGAYA Kenta KASAI Yuji SHIMOYAMA Tomoharu SHIBUYA Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/10/01
Vol. E88-A  No. 10  pp. 2745-2761
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Coding Theory
Keyword: 
two-edge type LDPC codeweight distributionstopping set distributionbelief propagationerror performance
 Summary | Full Text:PDF

Asymptotic Weight and Stopping Set Distributions for Detailedly Represented Irregular LDPC Code Ensembles
Ryoji IKEGAYA Kenta KASAI Tomoharu SHIBUYA Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/10/01
Vol. E87-A  No. 10  pp. 2484-2492
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Coding Theory
Keyword: 
weight distributionstopping set distributiondetailedly represented irregular LDPC code ensemble
 Summary | Full Text:PDF

Detailedly Represented Irregular Low-Density Parity-Check Codes
Kenta KASAI Tomoharu SHIBUYA Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2003/10/01
Vol. E86-A  No. 10  pp. 2435-2444
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Coding Theory
Keyword: 
density evolutionirregular low-density parity-check codeslow-density parity-check codesbelief propagation
 Summary | Full Text:PDF