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Resource Efficient LDPC Decoders

Resource Efficient LDPC Decoders Book
Author : Vikram Arkalgud Chandrasetty,Sayed Mahfuzul Aziz
Publisher : Academic Press
Release : 2017-12-15
ISBN : 0128112565
Language : En, Es, Fr & De

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Book Description :

This book takes a practical hands-on approach to developing low complexity algorithms and transforming them into working hardware. It follows a complete design approach – from algorithms to hardware architectures - and addresses some of the challenges associated with their design, providing insight into implementing innovative architectures based on low complexity algorithms. The reader will learn: Modern techniques to design, model and analyze low complexity LDPC algorithms as well as their hardware implementation How to reduce computational complexity and power consumption using computer aided design techniques All aspects of the design spectrum from algorithms to hardware implementation and performance trade-offs Provides extensive treatment of LDPC decoding algorithms and hardware implementations Gives a systematic guidance, giving a basic understanding of LDPC codes and decoding algorithms and providing practical skills in implementing efficient LDPC decoders in hardware Companion website containing C-Programs and MATLAB models for simulating the algorithms, and Verilog HDL codes for hardware modeling and synthesis

An Area Efficient Architecture for the Implementation of LDPC Decoder

An Area Efficient Architecture for the Implementation of LDPC Decoder Book
Author : Lan Yang
Publisher : Unknown
Release : 2011
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Due to its near Shannon limit performance in high speed communication, low-density parity check (LDPC) code has performed a strong comeback recent years. In this work, a partial parallel decoding architecture is proposed based on a column-layered LDPC decoding scheme [2]. The purpose of this work is to make a tradeoff between area cost and throughput. I construct the structure of the partial parallel decoder, and compare its throughput and area cost with the design in [2]. Then I obtain the synthesis results of my design with Xilinx FPGA tool. The device utilization summary and timing summary are provided at the end of this work. Comparing with the design in [2], the partial parallel design in my work needs much less hardware resources. As a result, when the area is limit and a lower throughput is acceptable, my design can be considered instead of the design in [2].

Advances in VLSI and Embedded Systems

Advances in VLSI and Embedded Systems Book
Author : Zuber Patel,Shilpi Gupta,Nithin Kumar Y. B.
Publisher : Springer Nature
Release : 2020-08-28
ISBN : 9811562296
Language : En, Es, Fr & De

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Book Description :

This book presents select peer-reviewed proceedings of the International Conference on Advances in VLSI and Embedded Systems (AVES 2019) held at SVNIT, Surat, Gujarat, India. The book covers cutting-edge original research in VLSI design, devices and emerging technologies, embedded systems, and CAD for VLSI. With an aim to address the demand for complex and high-functionality systems as well as portable consumer electronics, the contents focus on basic concepts of circuit and systems design, fabrication, testing, and standardization. This book can be useful for students, researchers as well as industry professionals interested in emerging trends in VLSI and embedded systems.

Design of LDPC Decoders for Improved Low Error Rate Performance

Design of LDPC Decoders for Improved Low Error Rate Performance Book
Author : Zhengya Zhang
Publisher : Unknown
Release : 2009
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Design of LDPC Decoders for Improved Low Error Rate Performance book written by Zhengya Zhang, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Error Correction Coding and Decoding

Error Correction Coding and Decoding Book
Author : Martin Tomlinson,Cen Jung Tjhai,Marcel A. Ambroze,Mohammed Ahmed,Mubarak Jibril
Publisher : Springer
Release : 2017-02-21
ISBN : 3319511033
Language : En, Es, Fr & De

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Book Description :

This book discusses both the theory and practical applications of self-correcting data, commonly known as error-correcting codes. The applications included demonstrate the importance of these codes in a wide range of everyday technologies, from smartphones to secure communications and transactions. Written in a readily understandable style, the book presents the authors’ twenty-five years of research organized into five parts: Part I is concerned with the theoretical performance attainable by using error correcting codes to achieve communications efficiency in digital communications systems. Part II explores the construction of error-correcting codes and explains the different families of codes and how they are designed. Techniques are described for producing the very best codes. Part III addresses the analysis of low-density parity-check (LDPC) codes, primarily to calculate their stopping sets and low-weight codeword spectrum which determines the performance of th ese codes. Part IV deals with decoders designed to realize optimum performance. Part V describes applications which include combined error correction and detection, public key cryptography using Goppa codes, correcting errors in passwords and watermarking. This book is a valuable resource for anyone interested in error-correcting codes and their applications, ranging from non-experts to professionals at the forefront of research in their field. This book is open access under a CC BY 4.0 license.

High Speed Decoders for Polar Codes

High Speed Decoders for Polar Codes Book
Author : Pascal Giard,Claude Thibeault,Warren J. Gross
Publisher : Springer
Release : 2017-08-30
ISBN : 3319597825
Language : En, Es, Fr & De

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Book Description :

A new class of provably capacity achieving error-correction codes, polar codes are suitable for many problems, such as lossless and lossy source coding, problems with side information, multiple access channel, etc. The first comprehensive book on the implementation of decoders for polar codes, the authors take a tutorial approach to explain the practical decoder implementation challenges and trade-offs in either software or hardware. They also demonstrate new trade-offs in latency, throughput, and complexity in software implementations for high-performance computing and GPGPUs, and hardware implementations using custom processing elements, full-custom application-specific integrated circuits (ASICs), and field-programmable-gate arrays (FPGAs). Presenting a good overview of this research area and future directions, High-Speed Decoders for Polar Codes is perfect for any researcher or SDR practitioner looking into implementing efficient decoders for polar codes, as well as students and professors in a modern error correction class. As polar codes have been accepted to protect the control channel in the next-generation mobile communication standard (5G) developed by the 3GPP, the audience includes engineers who will have to implement decoders for such codes and hardware engineers designing the backbone of communication networks.

Dissertation Abstracts International

Dissertation Abstracts International Book
Author : Anonim
Publisher : Unknown
Release : 2009
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Dissertation Abstracts International book written by , available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

System Level Approaches for Low Power Wireless Architectures

System Level Approaches for Low Power Wireless Architectures Book
Author : Amr Mohamed Hussien
Publisher : Unknown
Release : 2013
ISBN : 9781303354922
Language : En, Es, Fr & De

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Book Description :

Energy Management for multi-mode Software Defined Radio (SDR) systems remains a daunting challenge. There are emerging needs to build energy efficient platforms to support co-operation between heterogeneous wireless networks. This necessitates building efficient frameworks for reconfigurable platforms that can support seamless reconfiguration among different wireless scenarios. Towards achieving that goal, this thesis addresses the problem of building energy efficient wireless architectures from two perspectives. First, we develop a high level framework that generates a reconfigurable MPSoC architecture from a library of heterogeneous processing resources that can be reconfigured to support various modes of operation. The framework proposes joint task and core mapping with system level floorplanning. With the objective of minimizing energy, we develop an analytical probabilistic model that considers static, dynamic, reconfiguration and communication energy components for multiple applications characterized by certain probabilities of execution. Fast and efficient heuristics have been developed that can achieve solutions very close to those obtained via optimal solvers, with several orders of magnitude speedup. While, the first perspective focused on system level solutions, the second perspective focuses on the block level optimizations. It utilizes the fact that the use of embedded memory in its various forms and implementations for cellular base-stations and mobile handhelds has experienced unprecedented growth recently, significantly affecting area and power consumption metrics. Recent power reduction techniques aggressively modulate the supply voltage of embedded buffering memories, which allows acceptable hardware errors to flow through the processing chain as a cost of considerable power savings. This thesis presents a model that captures the statistics of both channel noise and buffering memory failures. Furthermore, it introduces modified forward error correction (FEC) decoders that are aware of both the channel errors as well as the buffering memory errors. The decoding maximizes the likelihood of the received data based on the statics of the combined channel and buffering memory noise. The idea is applicable to three widely used FEC decoders; namely Viterbi, Turbo, and LDPC decoders. The modified decoders are able to preserve the system performance very close to the hardware error-free case with negligible area overhead in implementation.

Efficient VLSI Architectures for Error Control Coders

Efficient VLSI Architectures for Error Control Coders Book
Author : Sang-Min Kim
Publisher : Unknown
Release : 2006
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Efficient VLSI Architectures for Error Control Coders book written by Sang-Min Kim, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

ISCAS 2001

ISCAS 2001 Book
Author : IEEE Circuits and Systems Society
Publisher : Unknown
Release : 2001
ISBN : 9780780366855
Language : En, Es, Fr & De

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Book Description :

Download ISCAS 2001 book written by IEEE Circuits and Systems Society, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Error Correction Coding and Decoding

Error Correction Coding and Decoding Book
Author : Martin Tomlinson,Cen Jung Tjhai,Marcel A. Ambroze,Mohammed Ahmed,Mubarak Jibril
Publisher : Springer
Release : 2017-04-11
ISBN : 9783319511023
Language : En, Es, Fr & De

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Book Description :

This book discusses both the theory and practical applications of self-correcting data, commonly known as error-correcting codes. The applications included demonstrate the importance of these codes in a wide range of everyday technologies, from smartphones to secure communications and transactions. Written in a readily understandable style, the book presents the authors’ twenty-five years of research organized into five parts: Part I is concerned with the theoretical performance attainable by using error correcting codes to achieve communications efficiency in digital communications systems. Part II explores the construction of error-correcting codes and explains the different families of codes and how they are designed. Techniques are described for producing the very best codes. Part III addresses the analysis of low-density parity-check (LDPC) codes, primarily to calculate their stopping sets and low-weight codeword spectrum which determines the performance of these codes. Part IV deals with decoders designed to realize optimum performance. Part V describes applications which include combined error correction and detection, public key cryptography using Goppa codes, correcting errors in passwords and watermarking. This book is a valuable resource for anyone interested in error-correcting codes and their applications, ranging from non-experts to professionals at the forefront of research in their field. This book is open access under a CC BY 4.0 license.

Error Correction Coding and Decoding

Error Correction Coding and Decoding Book
Author : Martin Tomlinson,Cen Jung Tjhai,Marcel A. Ambroze,Mohammed Ahmed,Mubarak Jibril
Publisher : Springer
Release : 2018-07-13
ISBN : 9783319845678
Language : En, Es, Fr & De

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Book Description :

This book discusses both the theory and practical applications of self-correcting data, commonly known as error-correcting codes. The applications included demonstrate the importance of these codes in a wide range of everyday technologies, from smartphones to secure communications and transactions. Written in a readily understandable style, the book presents the authors’ twenty-five years of research organized into five parts: Part I is concerned with the theoretical performance attainable by using error correcting codes to achieve communications efficiency in digital communications systems. Part II explores the construction of error-correcting codes and explains the different families of codes and how they are designed. Techniques are described for producing the very best codes. Part III addresses the analysis of low-density parity-check (LDPC) codes, primarily to calculate their stopping sets and low-weight codeword spectrum which determines the performance of th ese codes. Part IV deals with decoders designed to realize optimum performance. Part V describes applications which include combined error correction and detection, public key cryptography using Goppa codes, correcting errors in passwords and watermarking. This book is a valuable resource for anyone interested in error-correcting codes and their applications, ranging from non-experts to professionals at the forefront of research in their field. This book is open access under a CC BY 4.0 license.

Error Correction Coding and Decoding

Error Correction Coding and Decoding Book
Author : Mohammed Ahmed,Marcel a Ambroze,Mubarak Jibril
Publisher : Unknown
Release : 2020-10-08
ISBN : 9781013268144
Language : En, Es, Fr & De

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Book Description :

This book discusses both the theory and practical applications of self-correcting data, commonly known as error-correcting codes. The applications included demonstrate the importance of these codes in a wide range of everyday technologies, from smartphones to secure communications and transactions. Written in a readily understandable style, the book presents the authors' twenty-five years of research organized into five parts: Part I is concerned with the theoretical performance attainable by using error correcting codes to achieve communications efficiency in digital communications systems.Part II explores the construction of error-correcting codes and explains the different families of codes and how they are designed. Techniques are described for producing the very best codes.Part III addresses the analysis of low-density parity-check (LDPC) codes, primarily to calculate their stopping sets and low-weight codeword spectrum which determines the performance of these codes.Part IV deals with decoders designed to realize optimum performance.Part V describes applications which include combined error correction and detection, public key cryptography using Goppa codes, correcting errors in passwords and watermarking.This book is a valuable resource for anyone interested in error-correcting codes and their applications, ranging from non-experts to professionals at the forefront of research in their field. This work was published by Saint Philip Street Press pursuant to a Creative Commons license permitting commercial use. All rights not granted by the work's license are retained by the author or authors.

Hardware Implementation of Multiple input Multiple output Transceiver for Wireless Communication

Hardware Implementation of Multiple input Multiple output Transceiver for Wireless Communication Book
Author : Bing Han
Publisher : Unknown
Release : 2014
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

"This dissertation proposes an efficient hardware implementation scheme for iterative multi-input multi-output orthogonal frequency-division multiplexing (MIMO-OFDM) transceiver. The transmitter incorporates linear precoder designed with instantaneous channel state information (CSI). The receiver implements MMSE-IC (minimum mean square error interference cancelation) detector, channel estimator, low-density parity-check (LDPC) decoder and other supporting modules. The proposed implementation uses QR decomposition (QRD) of complex-valued matrices with four co-ordinate rotation digital computer (CORDIC) cores and back substitution to achieve the best tradeoff between resource and throughput. The MIMO system is used in field test and the results indicate that the instantaneous CSI varies very fast in practices and the performance of linear precoder designed with instantaneous CSI is limited. Instead, statistic CSI had to be used This dissertation also proposes a higher-rank principle Kronecker model (PKM). That exploits the statistic CSI to simulate the fading channels. The PKM is constructed by decomposing the channel correlation matrices with the higher-order singular value decomposition (HOSVD) method. The proposed PKM-HOSVD model is validated by extensive field experiments conducted for 4-by-4 MIMO systems in both indoor and outdoor environments. The results confirm that the statistic CSI varies slowly and the PKM-HOSVD will be helpful in the design of linear precoders."--Abstract, page iv.

The Art of Error Correcting Coding

The Art of Error Correcting Coding Book
Author : Robert H. Morelos-Zaragoza
Publisher : Wiley
Release : 2006-07-11
ISBN : 0470035692
Language : En, Es, Fr & De

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Book Description :

Building on the success of the first edition, which offered a practical introductory approach to the techniques of error concealment, this book, now fully revised and updated, provides a comprehensive treatment of the subject and includes a wealth of additional features. The Art of Error Correcting Coding, Second Edition explores intermediate and advanced level concepts as well as those which will appeal to the novice. All key topics are discussed, including Reed-Solomon codes, Viterbi decoding, soft-output decoding algorithms, MAP, log-MAP and MAX-log-MAP. Reliability-based algorithms GMD and Chase are examined, as are turbo codes, both serially and parallel concatenated, as well as low-density parity-check (LDPC) codes and their iterative decoders. Features additional problems at the end of each chapter and an instructor’s solutions manual Updated companion website offers new C/C ++programs and MATLAB scripts, to help with the understanding and implementation of basic ECC techniques Easy to follow examples illustrate the fundamental concepts of error correcting codes Basic analysis tools are provided throughout to help in the assessment of the error performance block and convolutional codes of a particular error correcting coding (ECC) scheme for a selection of the basic channel models This edition provides an essential resource to engineers, computer scientists and graduate students alike for understanding and applying ECC techniques in the transmission and storage of digital information.

Multilevel Coding with LDPC Component Codes for Power and Bandwidth Efficiency

Multilevel Coding with LDPC Component Codes for Power and Bandwidth Efficiency Book
Author : Piraporn Limpaphayom
Publisher : Unknown
Release : 2003
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Multilevel Coding with LDPC Component Codes for Power and Bandwidth Efficiency book written by Piraporn Limpaphayom, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Optimization of Advanced Telecommunication Algorithms from Power and Performance Perspective

Optimization of Advanced Telecommunication Algorithms from Power and Performance Perspective Book
Author : Zahid Khan,Tughrul Arslan,John Thompson
Publisher : Unknown
Release : 2011
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

This thesis investigates optimization of advanced telecommunication algorithms from power and performance perspectives. The algorithms chosen are MIMO and LDPC. MIMO is implemented in custom ASIC for power optimization and LDPC is implemented on dynamically reconfigurable fabric for both power and performance optimization. Both MIMO and LDPC are considered computational bottlenecks of current and future wireless standards such as IEEE 802.11n for Wi-Fi and IEEE 802.16 for WiMax applications. Optimization of these algorithms is carried out separately. The thesis is organized implicitly in two parts. The first part presents selection and analysis of the VBLAST receiver used in MIMO wireless system from custom ASIC perspective and identifies those processing elements that consume larger area as well as power due to complex signal processing. The thesis models a scalable VBLAST architecture based on MMSE nulling criteria assuming block rayleigh flat fading channel. After identifying the major area and power consuming blocks, it proposes low power and area efficient VLSI architectures for the three building blocks of VBLAST namely Pseudo Inverse, Sorting and NULLing & Cancellation modules assuming a 4x4 MIMO system. The thesis applies dynamic power management, algebraic transformation (strength reduction), resource sharing, clock gating, algorithmic modification, operation substitution, redundant arithmetic and bus encoding as the low power techniques applied at different levels of design abstraction ranging from system to architecture, to reduce power consumption. It also presents novel architectures not only for the constituent blocks but also for the whole receiver. It builds the low power VBLAST receiver for single carrier and provides its area, power and performance figures. It then investigates into the practicality and feasibility of VBLAST into an OFDM environment. It provides estimated data with respect to silicon real estate and throughput from which conclusion can easily be drawn about the feasibility of VBLAST in a multi carrier environment. The second part of the thesis presents novel architectures for the real time adaptive LDPC encoder and decoder as specified in IEEE 802.16E standard for WiMax application. It also presents optimizations of encoder as well as decoder on RICA (Reconfigurable Instruction Cell Architecture). It has searched an optimized way of storing the H matrices that reduces the memory by 20 times. It uses Loop unrolling to distribute the instructions spatially depending upon the available resources to execute them concurrently to as much as possible. The parallel memory banks and distributed registers inside RICA allow good reduction in memory access time. This together with hardware pipelining provides substantial potential for optimizing algorithms from power and performance perspectives. The thesis also suggests ways of improvements inside RICA architecture.

IEEE Transactions on Circuits and Systems

IEEE Transactions on Circuits and Systems Book
Author : Anonim
Publisher : Unknown
Release : 2006
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download IEEE Transactions on Circuits and Systems book written by , available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Distributed Iterative Decoding and Estimation Via Expectation Propagation

Distributed Iterative Decoding and Estimation Via Expectation Propagation Book
Author : John MacLaren Walsh
Publisher : Unknown
Release : 2006
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

This dissertation discusses the performance and convergence of a family of algorithms for distributed iterative approximate statistical inference called expectation propagation algorithms [1, 2]. Notable examples of expectation propagation include the turbo decoder [3, 4, 5, 6, 7], Gallager's algorithm for the soft decoding of LDPC codes[8, 9, 10], the Kalman filter [11], the forward backward algorithm[12], and belief propagation [13, 14]. These algorithms were heuristically proposed and neither their convergence behavior nor the mechanism behind their good performance is well understood. After covering special cases in which the algorithms can be shown to converge to the optimal values, we provide a novel performance framework which shows that the stationary points of the expectation propagation algorithms solve a constrained maximum likelihood optimization problem. We also show that the stationary points of expectation propagation are critical points of a constrained statistics based Bethe free energy. We then discuss duality and the relationship between the two generic optimality frameworks. Continuing on, we next study the mechanism of convergence behind expectation propagation, and discover that it may be interpreted both as a nonlinear block Gauss Seidel method [15, 16], on the gradient of the Lagrangian as well as a variant of Dykstra's algorithm [17] with iterated Bregman projections[18]. Some limited convergence results are provided via the nonlinear block Gauss Seidel interpretation. Throughout the dissertation, we take care to apply the abstract theory to particular well known members of the expectation propagation family, most notably the belief propagation decoder and the turbo decoder. The dissertation concludes with a discussion of several avenues that the work therein has opened up for further research.