Search Results 1-20 of 649

  • Structural Analysis of Nonbinary Cyclic and Quasi-Cyclic LDPC Codes with α-Multiplied Parity-Check Matrices

    LIU Haiyang , ZHANG Hao , MA Lianrong , KONG Lingjun

    … <p>In this letter, the structural analysis of nonbinary cyclic and quasi-cyclic (QC) low-density parity-check (LDPC) codes with α-multiplied parity-check matrices (PCMs) is concerned. … Using analytical methods, several structural parameters of nonbinary cyclic and QC LDPC codes with α-multiplied PCMs are determined. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2020

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  • Fast Converging ADMM Penalized Decoding Method Based on Improved Penalty Function for LDPC Codes

    WANG Biao

    … <p>For low-density parity-check (LDPC) codes, the penalized decoding method based on the alternating direction method of multipliers (ADMM) can improve the decoding performance at low signal-to-noise ratios and also has low decoding complexity. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2020

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  • Design and Construction of Irregular LDPC Codes for Channels with Synchronization Errors: New Aspect of Degree Profiles

    SHIBATA Ryo , HOSOYA Gou , YASHIMA Hiroyuki

    … <p>Over the past two decades, irregular low-density parity-check (LDPC) codes have not been able to decode information corrupted by insertion and deletion (ID) errors without markers. … In this paper, we bring to light the existence of irregular LDPC codes that approach the symmetric information rates (SIR) of the channel with ID errors, even without markers. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2020

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  • Successive Wyner-Ziv Coding for the Binary CEO Problem under Logarithmic Loss

    Nangir Mahdi , Asvadi Reza , Chen Jun , Ahmadian-Attari Mahmoud , Matsumoto Tad

    … In the proposed scheme, Low-Density Generator-Matrix (LDGM) codes are used for binary quantization while Low-Density Parity-Check (LDPC) codes are used for syndrome generation; …

    IEEE Transactions on Communications 67(11), 7512-7525, 2019-08-27

    IR 

  • Gradient-Descent Bit-Flipping Decoding Based on Tabu Search for LDPC Codes  [in Japanese]

    高橋 良介 , 高野 祐一

    … This paper is concerned with bit-flipping algorithms for decoding low-density parity check codes. …

    情報科学研究 (39), 51-59, 2019-03-01

    IR  DOI 

  • Linear Permutation Polynomial Codes  [in Japanese]

    吉田 涼一朗 , 笠井 健太

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 118(434), 161-166, 2019-01-31

  • Linear Permutation Polynomial Codes  [in Japanese]

    吉田 涼一朗 , 笠井 健太

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 118(433), 161-166, 2019-01-31

  • Hardware-Aware Sum-Product Decoding in the Decision Domain

    YAMADA Mizuki , TAKEUCHI Keigo , KOIKE Kiyoyuki

    … <p>We propose hardware-aware sum-product (SP) decoding for low-density parity-check codes. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E102.A(12), 1980-1987, 2019

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  • Weighted Bit-Flipping Decoding of LDPC Codes with LLR Adjustment for MLC Flash Memories

    ZHANG Xuan , JIAO Xiaopeng , HE Yu-Cheng , MU Jianjun

    … <p>Low-density parity-check (LDPC) codes can be used to improve the storage reliability of multi-level cell (MLC) flash memories because of their strong error-correcting capability. … In order to improve the weighted bit-flipping (WBF) decoding of LDPC codes in MLC flash memories with cell-to-cell interference (CCI), we propose two strategies of normalizing weights and adjusting log-likelihood ratio (LLR) values. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E102.A(11), 1571-1574, 2019

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  • A Fast Iterative Check Polytope Projection Algorithm for ADMM Decoding of LDPC Codes by Bisection Method

    LIN Yan , XIA Qiaoqiao , HE Wenwu , ZHANG Qinglin

    … <p>Using linear programming (LP) decoding based on alternating direction method of multipliers (ADMM) for low-density parity-check (LDPC) codes shows lower complexity than the original LP decoding. … However, the development of the ADMM-LP decoding algorithm could still be limited by the computational complexity of Euclidean projections onto parity check polytope. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E102.A(10), 1406-1410, 2019

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  • Design and Evaluation of Information Bottleneck LDPC Decoders for Digital Signal Processors

    LEWANDOWSKY Jan , BAUCH Gerhard , TSCHAUNER Matthias , OPPERMANN Peter

    … <p>Receiver implementations with very low quantization resolution will play an important role in 5G, as high precision quantization and signal processing are costly in terms of computational resources and chip area. … Therefore, low resolution receivers with quasi optimum performance will be required to meet complexity and latency constraints. …

    IEICE Transactions on Communications E102.B(8), 1363-1370, 2019

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  • EXIT Chart-Aided Design of LDPC Codes for Self-Coherent Detection with Turbo Equalizer for Optical Fiber Short-Reach Transmissions

    OSAWA Noboru , IBI Shinsuke , IGARASHI Koji , SAMPEI Seiichi

    … <p>This paper proposed an iterative soft interference canceller (IC) referred to as turbo equalizer for the self-coherent detection, and extrinsic information transfer (EXIT) chart based irregular low density parity check (LDPC) code optimization for the turbo equalizer in optical fiber short-reach transmissions. …

    IEICE Transactions on Communications E102.B(7), 1301-1312, 2019

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  • An improved implementation of sum-product algorithm for LDPC decoder

    Wang Zhou , Wu Bin , Ye Tianchun

    … <p>An improved decoding algorithm for low-density parity-check (LDPC) codes is presented. … By taking advantages of the first-term Taylor's series multiple expansion to approximate the correction term of the Jacobian logarithm used in LLR-SPA (log-likelihood ratio sum-product algorithm), we propose an algorithm which significantly simplifies the check node update computation of the optimal LLR-SPA. …

    IEICE Electronics Express 16(4), 20180828-20180828, 2019

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  • Constellation Shaping for Bit-Interleaved Coded Modulation with Pseudorandom Sequence  [in Japanese]

    由利 昌司 , 柴田 凌 , 細谷 剛 , 八嶋 弘幸

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 118(139), 45-50, 2018-07-19

  • Performance Evaluation of Integer Optimization Decoding  [in Japanese]

    柿沼 美希 , 高野 祐一

    … [2010] proposed an integer optimization formulation for the maximum likelihood decoding of binary linear codes. … The computational results demonstrate that in a lownoise condition, the integer optimization decoding achieved higher bit error rate performance than did the common sum-product decoding for low-density parity-check codes. …

    情報科学研究 (38), 17-24, 2018-03-01

    IR  DOI 

  • Expected Graph Evolution for Spatially "Mt. Fuji" Coupled LDPC Codes

    Yuta Nakahara , Toshiyasu Matsushima

    IEICE Proceeding Series (55), 511-511, 2018

    DOI 

  • A Note on Weight Distributions of Spatially "Mt. Fuji" Coupled LDPC Codes

    NAKAHARA Yuta , MATSUSHIMA Toshiyasu

    … <p>Spatially "Mt. Fuji" coupled (SFC) low density parity check (LDPC) codes are constructed as a chain of block LDPC codes. … A difference between the SFC-LDPC codes and the original spatially coupled (SC) LDPC codes is code lengths of the underlying block LDPC codes. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E101.A(12), 2194-2198, 2018

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  • Spatially Coupled Low-Density Parity-Check Codes on Two-Dimensional Array Erasure Channel

    HOSOYA Gou , YASHIMA Hiroyuki

    … <p>In this study, spatially coupled low-density parity-check (SC-LDPC) codes on the two-dimensional array erasure (2DAE) channel are devised, including a method for generating new SC-LDPC codes with a restriction on the check node constraint. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E101.A(12), 2008-2017, 2018

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  • Joint Iterative Decoding of Spatially Coupled Low-Density Parity-Check Codes for Position Errors in Racetrack Memories

    SHIBATA Ryo , HOSOYA Gou , YASHIMA Hiroyuki

    … Then, we propose a joint iterative decoding algorithm for spatially coupled low-density parity-check (SC-LDPC) codes over such a channel. … We investigate the asymptotic behaviors of SC-LDPC codes under the proposed decoding algorithm using density evolution (DE). …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E101.A(12), 2055-2063, 2018

    J-STAGE 

  • Upper Bound for Coded MIMO Systems without Enumeration of Codewords

    SEONG Jin-Taek , YOU Jin-Ho

    … <p>In this paper, we consider coded multi-input multi-output (MIMO) systems with low-density parity-check (LDPC) codes and space-time block code (STBC) in MIMO channels. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E101.A(11), 1925-1933, 2018

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