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Construction Of Rate Compatible Codes From Punctured Polar Code
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Book Synopsis Construction of Rate-compatible Codes from Punctured Polar Code by : Christopher Matthias Schnelling
Download or read book Construction of Rate-compatible Codes from Punctured Polar Code written by Christopher Matthias Schnelling and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Towards Practical Length-compatible Polar Codes by : Adam Cavatassi
Download or read book Towards Practical Length-compatible Polar Codes written by Adam Cavatassi and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "In 2008, a new class of block error correction codes, known as polar codes, were provenby Erdal Arıkan to be able to achieve the Shannon limit. Through inventive new de-coding algorithms and fast code constructions, polar codes have become an attractivehigh-performance error correction code for practical use. These innovations have resultedin adoption of polar codes in the upcoming 3GPP 5 th generation standard for New Ra-dio. Still, polar codes are hindered by certain inflexible characteristics. Arıkan's originalpolar code definition limits block lengths to powers of two, due to a recursive Kroneckerproduct of the 2 × 2 polarizing kernel. This constraint presents a considerable obstacle,as many realistic scenarios call for all code lengths to be readily available. Rate-matchingtechniques, known as puncturing and shortening, allow for flexible polar code lengths,albeit with inefficient decoding complexity. Multi-kernel polar codes produce native codelengths that are powers of two and/or three with the addition of a 3 × 3 ternary kernel,although they necessitate specialized decoders and code design. This thesis will exploreand propose techniques that are intended for maximizing the flexibility and efficiencyof polar codes, as well as analyze any trade-offs affecting error correction performance.An in-depth study is presented that compares state-of-the-art length-flexible polar codeswith the 3GPP standardized polar codes. This inquiry finds that the 5G standard offersa highly simplified polar code construction with minimal loss to error correction per-formance. Further, multi-kernel polar codes were found to have a negative correlationbetween error correction performance and the quantity of ternary Kronecker constituents.This thesis also proposes a new fast successive cancellation decoder that is compliant withmulti-kernel polar codes. The ternary kernel is further investigated by testing its rate-matching and systematic properties. Finally, this thesis proposes a new scheme calledasymmetric polar codes. We present details on generator matrix definition, informa-tion set design, and decoding schedules, as well as perform comparisons with competingschemes using simulations and a comprehensive analysis. Asymmetric polar codes offerflexible block lengths with decoding complexity lower than equivalent length-compatiblepolar codes under successive cancellation. The enclosed findings indicate that asymmetricpolar codes afford comparable error correction performance to the competing schemes,while dividing the number of successive cancellation decoding operations by up to a fac-tor of two. The thesis is then concluded by recommending appropriate extensions of thiswork for future research." --
Book Synopsis Communications, Signal Processing, and Systems by : Qilian Liang
Download or read book Communications, Signal Processing, and Systems written by Qilian Liang and published by Springer. This book was released on 2019-05-04 with total page 1125 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book brings together papers from the 2018 International Conference on Communications, Signal Processing, and Systems, which was held in Dalian, China on July 14–16, 2018. Presenting the latest developments and discussing the interactions and links between these multidisciplinary fields, the book spans topics ranging from communications, signal processing and systems. It is aimed at undergraduate and graduate electrical engineering, computer science and mathematics students, researchers and engineers from academia and industry as well as government employees.
Book Synopsis Fundamentals of 6G Communications and Networking by : Xingqin Lin
Download or read book Fundamentals of 6G Communications and Networking written by Xingqin Lin and published by Springer Nature. This book was released on 2024-01-12 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book begins with a historical overview of the evolution of mobile technologies and addresses two key questions: why do we need 6G? and what will 6G be? The remaining chapters of this book are organized into three parts: Part I covers the foundation of an end-to-end 6G system by presenting 6G vision, driving forces, key performance indicators, and societal requirements on digital inclusion, sustainability, and intelligence. Part II presents key radio technology components for the 6G communications to deliver extreme performance, including new radio access technologies at high frequencies, joint communications and sensing, AI-driven air interface, among others. Part III describes key enablers for intelligent 6G networking, including network disaggregation, edge computing, data-driven management and orchestration, network security and trustworthiness, among others. This book is relevant to researchers, professionals, and academics working in 5G/6G and beyond.
Book Synopsis 5G NR and Enhancements by : Hai Tang
Download or read book 5G NR and Enhancements written by Hai Tang and published by Elsevier. This book was released on 2021-10-24 with total page 1069 pages. Available in PDF, EPUB and Kindle. Book excerpt: 5G NR and Enhancements: From R15 to R16 introduces 5G standards, along with the 5G standardization procedure. The pros and cons of this technical option are reviewed, with the reason why the solution selected explained. The book's authors are 3GPP delegates who have been working on 4G/5G standardization for over 10 years. Their experience with the 5G standardization process will help readers understand the technology. Thousands of 3GPP papers and dozens of meeting minutes are also included to help explain how the 5G stand came into form. Provides a complete introduction to 5G standards, including Release 15 and 16, the essential vertical features URLLC, V2X and unlicensed spectrum access Introduces the 5G standardization procedure, along with the pros, cons and technical options Explains the “balance system design principle from the 5G standardization procedure Presents a vision of 5G R17 and 6G
Book Synopsis Broadband Communications, Networks, and Systems by : Wei Xiang
Download or read book Broadband Communications, Networks, and Systems written by Wei Xiang and published by Springer Nature. This book was released on 2022-01-01 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed post-conference proceedings of the 12th International Conference on Broadband Communications, Networks, and Systems, Broadnets 2021, which took place in October 2021. Due to COVID-19 pandemic the conference was held virtually. The 24 full papers presented were carefully reviewed and selected from 49 submissions. The papers are thematically grouped as a session on broadband communications, networks, and systems; 5G-enabled smart building: technology and challenge; and 5G: The advances in industry.
Download or read book 5G and Beyond written by Xingqin Lin and published by Springer Nature. This book was released on 2021-03-25 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an accessible and comprehensive tutorial on the key enabling technologies for 5G and beyond, covering both the fundamentals and the state-of-the-art 5G standards. The book begins with a historical overview of the evolution of cellular technologies and addresses the questions on why 5G and what is 5G. Following this, six tutorial chapters describe the fundamental technology components for 5G and beyond. These include modern advancements in channel coding, multiple access, massive multiple-input and multiple-output (MIMO), network densification, unmanned aerial vehicle enabled cellular networks, and 6G wireless systems. The second part of this book consists of five chapters that introduce the basics of 5G New Radio (NR) standards developed by 3GPP. These include 5G architecture, protocols, and physical layer aspects. The third part of this book provides an overview of the key 5G NR evolution directions. These directions include ultra-reliable low-latency communication (URLLC) enhancements, operation in unlicensed spectrum, positioning, integrated access and backhaul, air-to-ground communication, and non-terrestrial networks with satellite communication.
Book Synopsis Wireless and Satellite Systems by : Min Jia
Download or read book Wireless and Satellite Systems written by Min Jia and published by Springer. This book was released on 2019-05-06 with total page 665 pages. Available in PDF, EPUB and Kindle. Book excerpt: This two-volume set LNICST 280-281 constitutes the post-conference proceedings of the 10th EAI International Conference on Wireless and Satellite Services, WiSATS 2019, held in Harbin, China, in January 2019. The conference was formerly known as the International Conference on Personal Satellite Services (PSATS) mainly covering topics in the satellite domain. The 137 full papers were carefully reviewed and selected from 289 submissions. The papers are organized in topical sections on machine learning for satellite-terrestrial networks, human-machine interactive sensing, monitoring, and communications, integrated space and onboard networks, intelligent signal processing, wireless communications and networks, vehicular communications and networks, intelligent 5G communication and digital image processing technology, security, reliability and resilience in internet of things, advances in communications and computing for internet of things.
Book Synopsis Topics in Polar Coding by : Hanwen Yao
Download or read book Topics in Polar Coding written by Hanwen Yao and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The discovery of polar codes has been widely acknowledged as one of the most original and profound breakthroughs in coding theory in the recent two decades. Polar codes form the first explicit family of codes that provably achieves Shannon's capacities with efficient encoding and decoding for a wide range of channels. This solves one of the most fundamental problems in coding theory. At the beginning of its invention, polar code is more recognized as an intriguing theoretical topic due its mediocre performance at moderate block lengths. Later, with the invention of the list decoding algorithm and various other techniques, polar codes now show competitive, and in some cases, better performance as compared with turbo and LDPC codes. Due to this and other considerations, the 3rd Generation Partnership Project (3GPP) has selected polar codes for control and physical broadcast channels in the enhanced mobile broadband (eMBB) mode and the ultra-reliable low latency communications (URLLC) mode of the fifth generation (5G) wireless communications standard. In this dissertation, we propose new theories on a wide range of topics in polar coding, including structural properties, construction methods, and decoding algorithms. We begin by looking into the weight distribution of polar codes. As an important characteristic for an error correction code, weight distribution directly gives us estimations on the maximum-likelihood decoding performance of the code. In this dissertation, we present a deterministic algorithm for computing the entire weight distribution of polar codes. We first derive an efficient procedure to compute the weight distribution of polar cosets, and then show that any polar code can be represented as a disjoint union of such polar cosets. We further study the algebraic properties of polar codes as decreasing monomial codes to bound the complexity of our approach. Moreover, we show that this complexity can be drastically reduced using the automorphism group of decreasing monomial codes. Next, we dive into the topic of large kernel polar codes. It has been shown that polar codes achieve capacity at a rather slow speed, where this speed can be measured by a parameter called scaling exponent. One way to improve the scaling exponent of polar codes, is by replacing their conventional 2x2 kernel with a larger polarization kernel. In this dissertation, we propose theories and a construction approach for a special type of large polarization kernels to construct polar codes with better scaling exponents. Our construction method gives us the first explicit family of codes with scaling exponent provably under 3. However, large kernel polar codes are known for their high decoding complexity. In that respect, we also propose a new decoding algorithm that can efficiently perform successive cancellation decoding for large kernel polar codes. Moving on to the decoding algorithms, we focus ourselves on a new family of codes called PAC codes, recently introduced by Arikan, that combines polar codes with convolutional precoding. At short block lengths such as 128, PAC codes show better performance under sequential decoding compared with conventional polar codes with CRC precoding. In this dissertation, we first show that we can achieve the same superior performance of PAC codes using list decoding with relatively large list sizes. Then we carry out a qualitative complexity comparison between sequential decoding and list decoding for PAC codes. Lastly, we look into the subject of polar coded modulation. Bit-interleaved coded modulation (BICM) and multilevel coded modulation (MLC) are two ways commonly used to combine polar codes with high order modulation. In this dissertation, we propose a new hybrid polar coded modulation scheme that lies between BICM and MLC. For high order modulation, our hybrid scheme has a latency advantage compared with MLC. And by simulation we show that our hybrid scheme also achieves a considerable performance gain compared with BICM.
Book Synopsis Proceedings of the International Conference on Internet of Things, Communication and Intelligent Technology by : Jian Dong
Download or read book Proceedings of the International Conference on Internet of Things, Communication and Intelligent Technology written by Jian Dong and published by Springer Nature. This book was released on 2023-04-23 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book includes original, peer-reviewed research papers from the International Conference on Internet of Things, Communication and Intelligent Technology (IoTCIT) 2022. It contains the application of communication and IoT engineering in the age of intelligent technology+ from the standpoint of disciplinary integration, combining theory and associated IoT and intelligent technology algorithms. The topics cover the full range of IoT solutions, from IoT to network security, and focus on many forms of communication, such as Next Generation (6G) Mobile Communication, D2D, and M2M Communication. Additionally, it examines Intelligent Technology, with a focus on Information System Modeling and Simulation. It also explores Cloud Computing, Pervasive and Mobile Computing, Distributed Computing, High Performance Computing, and Ubiquitous Computing.
Book Synopsis Code Assignment of Rate Compatible Punctured Convolutional Codes for Unequal Error Protection Requirements by : Shanti Gavini
Download or read book Code Assignment of Rate Compatible Punctured Convolutional Codes for Unequal Error Protection Requirements written by Shanti Gavini and published by . This book was released on 2001 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polar Coding Techniques written by Wei Wu and published by . This book was released on 2021 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polar codes are the first family of error-correcting codes that was proved to achieve the capacity of binary memoryless symmetric (BMS) channels with efficient encoding and decoding algorithms. They have been drawing increasing interests in both industrial and academic research, especially after being adopted by the 3rd generation partnership project (3GPP) group as the channel codes for the control channel of the 5th generation (5G) wireless systems. The main goal of this dissertation is to explore polar coding techniques, as well as improve the current state-of-the-art, thereby broadening the applications of polar codes. We begin by studying partial orders (POs) for the synthesized bit-channels of polar codes. We give an alternative proof of an existing PO for bit-channels with the same Hamming weight and use the underlying idea to extend the bit-channel ordering to some additional cases. The bit-channels with universal ordering positions for binary erasure channel (BEC), which are independent of the channel erasure probability, are verified for all of the code blocklengths. We also show the threshold behavior of the Bhattacharyya parameters of some bit-channels by approximating the threshold values. Then, we move on to the decoding algorithms and improved polar codes. Despite the impressive asymptotic behavior by channel polarization, empirical results indicate less impressive performance of the successive cancellation (SC) decoder for polar codes of short blocklengths, e.g., compared to low-density parity-check (LDPC) codes. We consider belief propagation list (BPL) decoding with a special family of factor-graph layer permutations called stable permutations (SPs) that preserve a specified information set when the corresponding bit permutations are applied to message bit indices. Then, we propose a new code construction methodology to interpolate between Reed-Muller (RM) and polar codes. The new family of hybrid RM-polar codes has superior performance under several decoding algorithms, including SC list (SCL), belief propagation (BP), BPL, and soft-cancellation list (SCANL). By taking advantage of an existing PO on bit-channels whose corresponding indices share the same Hamming weight, we analyze the complexity of the new construction method. Furthermore, we propose an algorithm of BP decoding for polar codes with a special family of large kernels called permuted kernels, in which the leftmost messages over the factor graph need to be permuted accordingly.
Book Synopsis New Frontiers in Polar Coding by : Arman Fazeli Chaghooshi
Download or read book New Frontiers in Polar Coding written by Arman Fazeli Chaghooshi and published by . This book was released on 2018 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt: The discovery of channel polarization and polar codes is universally recognized as an historic breakthrough in coding theory. Polar codes provably achieve the capacity of any memoryless symmetric channel, with low encoding and decoding complexity. Moreover, for short block lengths, polar codes under specific decoding algorithms are currently the best known coding scheme for binary-input Gaussian channels. Due to this and other considerations, 3GPP has recently decided to incorporate polar codes in the 5G wireless communications standard. Soon enough, a remarkably short time after their invention, we will be all using polar codes whenever we make a phone call or access the Internet on a mobile device. Our goal in this dissertation is to explore new frontiers in polar coding, thereby fundamentally advancing the current state-of-the-art in the field. Parts of the results are immediately relevant for successful deployment of polar codes in wireless systems, whereas other parts will focus on key theoretical problems in polar coding that have a longer time-horizon. We begin by studying the effect of the polarization kernels in the asymptotic behavior of polar codes. We show that replacing the conventional 2×2 kernel in the construction of polar codes with that of a larger size can reduce the gap to the capacity if the larger kernel is carefully selected. A heuristic algorithm is proposed that helps to find such kernels. Furthermore, we prove that a near-optimal scaling behavior is achievable if one is allowed to increase the kernel size as needed. We also study the computational complexity of decoding algorithms for polar codes with large kernels, which are viewed as their main implementation obstacle. Moving on to the decoding algorithms, we carefully analyze the performance of the successive cancellation decoder with access to the abstract concept of Arikan's genie. The CRC-aided successive-cancellation list decoding, the primary decoding method of polar codes, is commonly viewed as an implementation of the Arikan's genie. However, it comes short at completely simulating the genie since the auxiliary information (CRC) comes to the help only at the end of the decoding process. We overcome this problem by introducing the convolutional decoding algorithm of polar codes that is based on a high-rate convolutional pre-coder and utilizes Viterbi Algorithm to mimic the genie all the way through the SC decoding process. Lastly, we look into channels with deletions. A key assumption in the traditional polar coding is to transmit coded symbols over independent instances of the communication channel. Channels with memory and in particular, deletion channels, do not follow this rule. We introduce a modified polar coding scheme for these channels that depend on much less computational power for decoding than the existing solutions. We also extend the polarization theorems to provide theoretical guarantee and to prove the correctness of our algorithms.
Book Synopsis Constructing Polar Codes Using Iterative Bit-Channel Upgrading by : Arash Ghayoori
Download or read book Constructing Polar Codes Using Iterative Bit-Channel Upgrading written by Arash Ghayoori and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The definition of polar codes given by Arikan is explicit, but the construction complexity is an issue. This is due to the exponential growth in the size of the output alphabet of the bit-channels as the codeword length increases. Tal and Vardy recently presented a method for constructing polar codes which controls this growth. They approximated each bit-channel with a "better" channel and a "worse" channel while reducing the alphabet size. They constructed a polar code based on the "worse" channel and used the "better" channel to measure the distance from the optimal channel. This thesis considers the knowledge gained from the perspective of the "better" channel. A method is presented using iterative upgrading of the bit-channels which successivelyresults in a channel closer to the original one. It is shown that this approach can be used to obtain a channel arbitrarily close to the original channel, and therefore to the optimal construction of a polar code.
Book Synopsis Broadband Communications, Networks, and Systems by : Wei Xiang
Download or read book Broadband Communications, Networks, and Systems written by Wei Xiang and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed post-conference proceedings of the 12th International Conference on Broadband Communications, Networks, and Systems, Broadnets 2021, which took place in October 2021. Due to COVID-19 pandemic the conference was held virtually. The 24 full papers presented were carefully reviewed and selected from 49 submissions. The papers are thematically grouped as a session on broadband communications, networks, and systems; 5G-enabled smart building: technology and challenge; and 5G: The advances in industry.
Download or read book Channel Codes written by William Ryan and published by Cambridge University Press. This book was released on 2009-09-17 with total page 709 pages. Available in PDF, EPUB and Kindle. Book excerpt: Channel coding lies at the heart of digital communication and data storage, and this detailed introduction describes the core theory as well as decoding algorithms, implementation details, and performance analyses. In this book, Professors Ryan and Lin provide clear information on modern channel codes, including turbo and low-density parity-check (LDPC) codes. They also present detailed coverage of BCH codes, Reed-Solomon codes, convolutional codes, finite geometry codes, and product codes, providing a one-stop resource for both classical and modern coding techniques. Assuming no prior knowledge in the field of channel coding, the opening chapters begin with basic theory to introduce newcomers to the subject. Later chapters then extend to advanced topics such as code ensemble performance analyses and algebraic code design. 250 varied and stimulating end-of-chapter problems are also included to test and enhance learning, making this an essential resource for students and practitioners alike.
Book Synopsis Recent Trends in Communication and Intelligent Systems by : Harish Sharma
Download or read book Recent Trends in Communication and Intelligent Systems written by Harish Sharma and published by Springer Nature. This book was released on 2020-01-17 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book gathers the best research papers presented at the International Conference on Recent Trends in Communication and Intelligent Systems (ICRTCIS 2019), organized by Rajasthan Technical University Kota, and Arya College of Engineering and IT, Jaipur, on 8–9 June 2019. It discusses the latest technologies in communication and intelligent systems, covering various areas of communication engineering, such as signal processing, VLSI design, embedded systems, wireless communications, and electronics and communications in general. Featuring work by leading researchers and technocrats, the book serves as a valuable reference resource for young researchers and academics as well as practitioners in industry.
