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Algorithms are presented that efficiently shape the parity bits of systematic irregular repeat-accumulate (IRA) low-density parity-check (LDPC) codes by following the sequential encoding order of the accumulator. Simulations over additive…

信息论 · 计算机科学 2025-08-28 Diego Lentner , Thomas Wiegart , Richard D. Wesel

We explain an algorithm that approximately but efficiently assesses particular parity-check error-correcting codes of large, but finite, blocklength. This algorithm is based on the ``renormalization-group'' approach from physics: the idea…

凝聚态物理 · 物理学 2007-05-23 Jonathan Yedidia , Jean-Philippe Bouchaud

In this paper we study reaction and timing attacks against cryptosystems based on sparse parity-check codes, which encompass low-density parity-check (LDPC) codes and moderate-density parity-check (MDPC) codes. We show that the feasibility…

信息论 · 计算机科学 2019-04-30 Paolo Santini , Massimo Battaglioni , Franco Chiaraluce , Marco Baldi

Quasi-cyclic (QC) low-density parity-check (LDPC) codes which are known as QC-LDPC codes, have many applications due to their simple encoding implementation by means of cyclic shift registers. In this paper, we construct QC-LDPC codes from…

信息论 · 计算机科学 2017-01-03 Hassan Khodaiemehr , Dariush Kiani

We construct a new explicit family of good quantum low-density parity-check codes which additionally have linear time decoders. Our codes are based on a three-term chain $(\mathbb{F}_2^{m\times m})^V \quad \xrightarrow{\delta^0}\quad…

量子物理 · 物理学 2022-06-17 Irit Dinur , Min-Hsiu Hsieh , Ting-Chun Lin , Thomas Vidick

We consider the decoding problem or the problem of finding low weight codewords for rank metric codes. We show how additional information about the codeword we want to find under the form of certain linear combinations of the entries of the…

密码学与安全 · 计算机科学 2015-04-22 Adrien Hauteville , Jean-Pierre Tillich

In his thesis, Wiberg showed the existence of thresholds for families of regular low-density parity-check codes under min-sum algorithm decoding. He also derived analytic bounds on these thresholds. In this paper, we formulate similar…

信息论 · 计算机科学 2007-07-16 Ralf Koetter , Pascal O. Vontobel

This paper develops a general method for constructing entanglement-assisted quantum low-density parity-check (LDPC) codes, which is based on combinatorial design theory. Explicit constructions are given for entanglement-assisted quantum…

We obtain exact expressions for the asymptotic behaviour of the average probability of the block decoding error for ensembles of regular low density parity check error correcting codes, by employing diagrammatic techniques. Furthermore, we…

统计力学 · 物理学 2007-05-23 J. van Mourik , Y. Kabashima

We present a rank metric code-based encryption scheme with key and ciphertext sizes comparable to that of isogeny-based cryptography for an equivalent security level. The system also benefits from efficient encryption and decryption…

密码学与安全 · 计算机科学 2019-12-02 Julien Lavauzelle , Pierre Loidreau , Ba-Duc Pham

Quantum error correction is an indispensable ingredient for scalable quantum computing. In this Perspective we discuss a particular class of quantum codes called low-density parity-check (LDPC) quantum codes. The codes we discuss are…

量子物理 · 物理学 2021-10-26 Nikolas P. Breuckmann , Jens Niklas Eberhardt

This paper presents several new construction techniques for low-density parity-check (LDPC) and systematic repeat-accumulate (RA) codes. Based on specific classes of combinatorial designs, the improved code design focuses on high-rate…

信息论 · 计算机科学 2018-07-03 Alexander Gruner , Michael Huber

We solve the problem of designing powerful low-density parity-check (LDPC) codes with iterative decoding for the block-fading channel. We first study the case of maximum-likelihood decoding, and show that the design criterion is rather…

信息论 · 计算机科学 2016-11-18 Joseph J. Boutros , Albert Guillen i Fabregas , Ezio Biglieri , Gilles Zemor

Reed-Muller (RM) codes exhibit good performance under maximum-likelihood (ML) decoding due to their highly-symmetric structure. In this paper, we explore the question of whether the code symmetry of RM codes can also be exploited to achieve…

信息论 · 计算机科学 2018-04-30 Elia Santi , Christian Häger , Henry D. Pfister

This paper examines the construction of low-density parity-check (LDPC) codes from transversal designs based on sets of mutually orthogonal Latin squares (MOLS). By transferring the concept of configurations in combinatorial designs to the…

信息论 · 计算机科学 2018-07-03 Alexander Gruner , Michael Huber

We propose fault-tolerant encoders for quantum low-density parity check (LDPC) codes. By grouping qubits within a quantum code over contiguous blocks and applying preshared entanglement across these blocks, we show how transversal…

量子物理 · 物理学 2024-05-27 Abhi Kumar Sharma , Shayan Srinivasa Garani

In this paper, a new decoding scheme for low-density parity-check (LDPC) codes using the concept of simple product code structure is proposed based on combining two independently received soft-decision data for the same codeword. LDPC codes…

信息论 · 计算机科学 2024-10-30 Beomkyu Shin , Seokbeom Hong , Hosung Park , Jong-Seon No , Dong-Joon Shin

This paper introduces a class of structured lowdensity parity-check (LDPC) codes whose parity check matrices are arrays of permutation matrices. The permutation matrices are obtained from Latin squares and form a finite field under some…

信息论 · 计算机科学 2010-04-09 Dung Viet Nguyen , Bane Vasic , Michael Marcellin , Shashi Kiran Chilappagari

This paper basically expresses the core fundamentals and brief overview of the research of R. G. GALLAGER [1] on Low-Density Parity-Check (LDPC) codes and various parameters related to LDPC codes like, encoding and decoding of LDPC codes,…

信息论 · 计算机科学 2020-09-21 Saumya Borwankar , Dhruv Shah

An algebraic group ring method for constructing codes with no short cycles in the check matrix is derived. It is shown that the matrix of a group ring element has no short cycles if and only if the collection of group differences of this…

环与代数 · 数学 2008-07-23 Ted Hurley , Paul McEvoy , Jakub Wenus