Enhanced Coding Based Modulation for OFDM-based Visible Light Communication
Enhanced Coding Based Modulation for OFDM-based Visible Light Communication

Author: Nima Taherkhani

Publisher:

Published: 2021

Total Pages: 0

ISBN-13:

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OFDM-based Visible Light Communication (VLC) has been developed and adopted recently as an alternative technology for indoor optical communication due to the abundant bandwidth available in the visible light spectrum. OFDM offers several advantages for VLC systems, such as an efficient use of the spectrum and a low complexity method for inter-symbol interference mitigation. However, the small dynamic operational range of the VLC optical front-end in these systems poses a challenge to an OFDM-based system. These issues lead to clipping of signal picks which will cause power efficiency loss and nonlinear distortion. Most of the existing techniques utilize part of the frequency bandwidth for battling clipping noise which compromises modulation bandwidth and data. This study offers a modulation technique based on Reed Solomon code and OFDM subcarrier index modulation to battle the clipping distortion while enhancing the data rate in OFDM -VLC. Unlike the traditional index modulation techniques, the new technique attempts to convey extra information by nulling a subset of subcarriers in the OFDM frame. In this technique, referred to as RS-OFDM-IM, data symbols are embedded onto both signal and nonsignal subcarriers. Due to the reduced number of active subcarriers, the OFDM signal shows a less bursty envelope, which will cause low clipping distortion. Furthermore, with the aid of the RS code algebraic structure in decoding of codewords and its erasure extraction property, the nulling diversity is achieved. This allows for a better bit-error-rate in OFDM-VLC that is superior to those of the existing techniques. The reduced BER and additional information transmitted by the index modulation lead to a throughput improvement in OFDM-VLC with clipping constraint. The theoretical BER bound and the throughput of RS-OFDM-IM are discussed and are compared with those of the traditional coding-based OFDM techniques in VLC.

Visible Light Communication
Visible Light Communication

Author: Suseela Vappangi

Publisher: CRC Press

Published: 2021-08-11

Total Pages: 439

ISBN-13: 1000416224

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The field of visible light communication (VLC) has diverse applications to the end user including streaming audio, video, high-speed data browsing, voice over internet and online gaming. This comprehensive textbook discusses fundamental aspects, research activities and modulation techniques in the field of VLC. Visible Light Communication: A Comprehensive Theory and Applications with MATLAB® discusses topics including line of sight (LOS) propagation model, non-line of sight (NLOS) propagation model, carrier less amplitude and phase modulation, multiple-input-multiple-output (MIMO), non-linearities of optical sources, orthogonal frequency-division multiple access, non-orthogonal multiple access and single-carrier frequency-division multiple access in depth. Primarily written for senior undergraduate and graduate students in the field of electronics and communication engineering for courses on optical wireless communication and VLC, this book: Provides up-to-date literature in the field of VLC Presents MATLAB codes and simulations to help readers understand simulations Discusses applications of VLC in enabling vehicle to vehicle (V2V) communication Covers topics including radio frequency (RF) based wireless communications and VLC Presents modulation formats along with the derivations of probability of error expressions pertaining to different variants of optical OFDM

Visible Light Communications
Visible Light Communications

Author: Zhaocheng Wang

Publisher: John Wiley & Sons

Published: 2017-11-29

Total Pages: 368

ISBN-13: 1119331382

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A complete and comprehensive reference on modulation and signal processing for visible light communication This informative new book on state-of-the-art visible light communication (VLC) provides, for the first time, a systematical and advanced treatment of modulation and signal processing for VLC. Visible Light Communications: Modulation and Signal Processing offers a practical guide to designing VLC, linking academic research with commercial applications. In recent years, VLC has attracted attention from academia and industry since it has many advantages over the traditional radio frequency, including wide unregulated bandwidth, high security, and low cost. It is a promising complementary technique in 5G and beyond wireless communications, especially in indoor applications. However, lighting constraints have not been fully considered in the open literature when considering VLC system design, and its importance has been underestimated. That’s why this book—written by a team of experts with both academic research experience and industrial development experience in the field—is so welcome. To help readers understand the theory and design of VLC systems, the book: Details many modern techniques on both modulation and signal processing aspects Links academic research with commercial applications in visible light communications as well as other wireless communication systems Combines theoretical rigor with practical examples in presenting optical camera communication systems Visible Light Communications: Modulation and Signal Processing serves as a useful tool and reference book for visible light communication professionals, as well as wireless communication system professionals and project managers. It is also an important guide for undergraduates and graduates who want to conduct research in areas of wireless communications.

Optoelectronics
Optoelectronics

Author: Sergei Pyshkin

Publisher: BoD – Books on Demand

Published: 2017-07-12

Total Pages: 374

ISBN-13: 9535133691

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Optoelectronics - Advanced Device Structures (Book IV) is following the Optoelectronics (Books I, II, and III) published in 2011, 2013, and 2015, as part of the InTech collection of international works on optoelectronics. Accordingly, as with the first three books of the collection, this book covers recent achievements by specialists around the world. The growing number of countries participating in this endeavor as well as joint participation of the US and Moldova scientists in edition of this book testifies to the unifying effect of science. An interested reader will find in the book the description of properties and applications employing organic and inorganic materials, as well as the methods of fabrication and analysis of operation and regions of application of modern optoelectronic devices.

Index Modulation for OFDM Communications Systems
Index Modulation for OFDM Communications Systems

Author: Miaowen Wen

Publisher: Springer Nature

Published: 2021-01-04

Total Pages: 182

ISBN-13: 9811594074

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Thanks to their considerable advantages, index modulation and orthogonal frequency division multiplexing (OFDM) are considered to be promising candidates for future wireless communications. This book focuses on the index modulation techniques for OFDM communications systems, which allow information to be conveyed not only via constellation symbols, but also by the indices of various transmission entities in OFDM systems, such as signal constellations, spreading codes, and pilots. The book discusses representative transmitter and receiver designs, optimization and performance analysis of index modulation based on various transmission entities. It first introduces readers to constellation-based index modulation via a combinatorial approach, including the classical index modulation scheme and two embodiments of information-guided precoding for OFDM systems. It further discusses constellation-based index modulation via a permutational approach, including the basic, generalized, and diversity-enhancing forms. It then describes how the spreading code is used to design an index modulated spread spectrum for OFDM systems, and the extensions to multi-code and multi-user scenarios. In addition it explores information guided pilot insertion for OFDM systems, followed by applications to carrier phase tracking and channel estimation. Lastly, the book highlights a number of open problems and discusses future research directions in the general field of index modulation. Intended for professionals and researchers in the field of wireless communications, this book is also a valuable resource for advanced-level electrical engineering and computer science students.

Transceiver Design for MIMO DCO-OFDM in Visible Light Communication
Transceiver Design for MIMO DCO-OFDM in Visible Light Communication

Author: Jian Dang

Publisher:

Published: 2017

Total Pages:

ISBN-13:

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Direct current-biased optical-orthogonal frequency-division multiplexing (DCO-OFDM) is a simple yet spectrally efficient multicarrier modulation scheme for visible light communication (VLC). But in multiple-input multiple-output (MIMO) scenario, which is more practical for VLC due to the LED deployment, the research on DCO-OFDM is still limited and calls for in-depth investigation. In this chapter, we first study the basic modulation scheme of DCO-OFDM, including the design of conventional receiver without considering the clipping noise. Secondly, we present a novel receiver for combating clipping distortion in the DCO-OFDM system, which can reconstruct the clipping noise and subtract it from the received signal. Thirdly, we generalize the results to MIMO scenario and investigate the preliminary transceiver design, which is based on the minimum mean-square error (MMSE) criteria. Based on this, we propose a precoding algorithm to further enhance the performance. Finally, the symbol error rate performance is compared through computer simulations to give the reader a whole picture of the performance of MIMO VLC system.

Visible Light Communication
Visible Light Communication

Author: Shlomi Arnon

Publisher: Cambridge University Press

Published: 2015-03-05

Total Pages: 223

ISBN-13: 1316240444

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Visible light communication (VLC) is an evolving communication technology for short-range applications. Exploiting recent advances in the development of high-power visible-light emitting LEDs, VLC offers an energy-efficient, clean alternative to RF technology, enabling the development of optical wireless communication systems that make use of existing lighting infrastructure. Drawing on the expertise of leading researchers from across the world, this concise book sets out the theoretical principles of VLC, and outlines key applications of this cutting-edge technology. Providing insight into modulation techniques, positioning and communication, synchronisation, and industry standards, as well as techniques for improving network performance, this is an invaluable resource for graduate students and researchers in the fields of visible light communication, optical wireless communication, and industrial practitioners in the field of telecommunications.

International Conference on Intelligent Computing and Applications
International Conference on Intelligent Computing and Applications

Author: Subhransu Sekhar Dash

Publisher: Springer

Published: 2017-12-28

Total Pages: 662

ISBN-13: 9811055203

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The book is a collection of best papers presented in International Conference on Intelligent Computing and Applications (ICICA 2016) organized by Department of Computer Engineering, D.Y. Patil College of Engineering, Pune, India during 20-22 December 2016. The book presents original work, information, techniques and applications in the field of computational intelligence, power and computing technology. This volume also talks about image language processing, computer vision and pattern recognition, machine learning, data mining and computational life sciences, management of data including Big Data and analytics, distributed and mobile systems including grid and cloud infrastructure.

Optical Fiber and Wireless Communications
Optical Fiber and Wireless Communications

Author: Rastislav Róka

Publisher: BoD – Books on Demand

Published: 2017-06-21

Total Pages: 374

ISBN-13: 953513275X

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The book Optical Fiber and Wireless Communications provides a platform for practicing researchers, academics, PhD students, and other scientists to review, plan, design, analyze, evaluate, intend, process, and implement diversiform issues of optical fiber and wireless systems and networks, optical technology components, optical signal processing, and security. The 17 chapters of the book demonstrate capabilities and potentialities of optical communication to solve scientific and engineering problems with varied degrees of complexity.