Results 231 to 240 of about 11,054,895 (265)

Low-Density Parity-Check Codes

2014
This chapter provides a brief overview of the basic concepts and definitions concerning Low-Density Parity-Check (LDPC) codes, which will be used in the remainder of the book. The notation concerning LDPC codes which will be used throughout the book is introduced. LDPC encoding and decoding algorithms and their complexity are also discussed.
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Low-Density Parity-Check Codes

1963
This is a complete presentation of all important theoretical and experimental work done on low-density codes. Low-density coding is one of the three techniques thus far developed for efficient communication over noisy channels with an arbitrarily low probability of error. A principal result of information theory is that if properly coded information is
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Iterative encoding of low-density parity-check codes

Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE, 2004
Motivated by the potential to reuse the decoder architecture, and thus reduce circuit space, we explore the use of iterative encoding techniques which are based upon the graphical representation of the code. We design codes by identifying associated encoder convergence constraints and also eliminating some well known undesirable properties for sum ...
David Haley, Alex J. Grant, John Buetefuer   +2 more
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Architecture-aware low-density parity-check codes

Proceedings of the 2003 International Symposium on Circuits and Systems, 2003. ISCAS '03., 2003
A high-throughput memory-efficient decoder architecture for architecture-aware low-density parity-check (LDPC) codes is proposed based on a novel turbo-decoding algorithm. The architecture benefits from various optimizations at the code-design, decoding algorithm, and decoder architecture levels. The interconnect complexity and memory overhead problems
Mohammad M. Mansour, Naresh R. Shanbhag
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Low Density Parity Check Codes

2020
A linear code with a check matrix in which each column has few non-zero entries is called a low density parity check code or, for brevity, an LDPC code. These codes were introduced in the 1960s by Gallager who proved that probabilistic constructions of such matrices produce asymptotically good linear codes. Moreover, he observed that LDPC codes perform
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Low-Density Parity-Check Codes for ATSC 3.0

IEEE Transactions on Broadcasting, 2016
In this paper, we introduce the overview and detailed structure of low-density parity-check (LDPC) codes, which are adopted for the physical layer standard of Advanced Television Systems Committee (ATSC) 3.0. As one of the features to mitigate channel errors efficiently, LDPC codes are used as a main part of forward error correction scheme within the ...
Kyung-Joong Kim 0002, Seho Myung, Sung Ik Park, Jae-Young Lee 0001, Makiko Kan, Yuji Shinohara, Jong-Woong Shin, Jinwoo Kim   +7 more
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The semi-algebra low-density parity-check codes

2004 IEEE International Conference on Communications (IEEE Cat. No.04CH37577), 2004
In this paper, the construction of semi-algebra Low-density parity-check (LDPC) code with an arbitrary block length is presented. The encoding circuit is based on the original semi-algebra design and users can have the choice of using the matrix pattern and various code rates to design for different communication applications. Especially, a novel girth
Yu Yi, Gi Yean Hwang, Moon Ho Lee
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Low-Density Parity-Check Codes

2000
Gallager first proposed low-density parity-check (LDPC) codes and their iterative detection algorithm in 1962 [Gallager, 1962]. They have been almost forgotten for thirty years. Recently, with the extensive research on “turbo-like” codes and on iterative detection, LDPC codes re-emerge as another category of random codes approaching the Shannon ...
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Low Density Parity Check Codes

2015
Low density parity check (LDPC) codes are forward error-correction codes, invented by Robert Gallager in his MIT Ph.D. dissertation, 1960. The LDPC codes are ignored for long time due to their high computational complexity and domination of highly structured algebraic block and convolutional codes for forward error correction.
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Low-Density Parity-Check Codes

2013
Low-density parity-check (LDPC) codes were introduced in 1960 by R. Gallager [1] in his Phd thesis. He already introduced the iterative method for decoding LDPC codes. However, also due to their computational and implementation complexity the iterative decoding was largely ignored.
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