Ofdm For Optical Communications

Ofdm For Optical Communications Book PDF
✏Book Title : OFDM for Optical Communications
✏Author : William Shieh
✏Publisher : Academic Press
✏Release Date : 2009-09-18
✏Pages : 456
✏ISBN : 0080952062
✏Available Language : English, Spanish, And French

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✏OFDM for Optical Communications Book Summary : The first book on optical OFDM by the leading pioneers in the field The only book to cover error correction codes for optical OFDM Gives applications of OFDM to free-space communications, optical access networks, and metro and log haul transports show optical OFDM can be implemented Contains introductions to signal processing for optical engineers and optical communication fundamentals for wireless engineers This book gives a coherent and comprehensive introduction to the fundamentals of OFDM signal processing, with a distinctive focus on its broad range of applications. It evaluates the architecture, design and performance of a number of OFDM variations, discusses coded OFDM, and gives a detailed study of error correction codes for access networks, 100 Gb/s Ethernet and future optical networks. The emerging applications of optical OFDM, including single-mode fiber transmission, multimode fiber transmission, free space optical systems, and optical access networks are examined, with particular attention paid to passive optical networks, radio-over-fiber, WiMAX and UWB communications. Written by two of the leading contributors to the field, this book will be a unique reference for optical communications engineers and scientists. Students, technical managers and telecom executives seeking to understand this new technology for future-generation optical networks will find the book invaluable. William Shieh is an associate professor and reader in the electrical and electronic engineering department, The University of Melbourne, Australia. He received his M.S. degree in electrical engineering and Ph.D. degree in physics both from University of Southern California. Ivan Djordjevic is an Assistant Professor of Electrical and Computer Engineering at the University of Arizona, Tucson, where he directs the Optical Communications Systems Laboratory (OCSL). His current research interests include optical networks, error control coding, constrained coding, coded modulation, turbo equalization, OFDM applications, and quantum error correction. "This wonderful book is the first one to address the rapidly emerging optical OFDM field. Written by two leading researchers in the field, the book is structured to comprehensively cover any optical OFDM aspect one could possibly think of, from the most fundamental to the most specialized. The book adopts a coherent line of presentation, while striking a thoughtful balance between the various topics, gradually developing the optical-physics and communication-theoretic concepts required for deep comprehension of the topic, eventually treating the multiple optical OFDM methods, variations and applications. In my view this book will remain relevant for many years to come, and will be increasingly accessed by graduate students, accomplished researchers as well as telecommunication engineers and managers keen to attain a perspective on the emerging role of OFDM in the evolution of photonic networks." -- Prof. Moshe Nazarathy, EE Dept., Technion, Israel Institute of Technology * The first book on optical OFDM by the leading pioneers in the field * The only book to cover error correction codes for optical OFDM * Applications of OFDM to free-space communications, optical access networks, and metro and log haul transports show optical OFDM can be implemented * An introduction to signal processing for optical communications * An introduction to optical communication fundamentals for the wireless engineer

Ofdm Systems For Optical Communication With Intensity Modulation And Direct Detection Book PDF
✏Book Title : OFDM Systems for Optical Communication with Intensity Modulation and Direct Detection
✏Author : Jian Dang
✏Publisher :
✏Release Date : 2017
✏Pages :
✏ISBN : OCLC:1154156027
✏Available Language : English, Spanish, And French

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✏OFDM Systems for Optical Communication with Intensity Modulation and Direct Detection Book Summary : Intensity modulation and direct detection (IM/DD) is a cost-effective optical communication strategy which finds wide applications in fiber communication, free-space optical communication, and indoor visible light communication. In IM/DD, orthogonal frequency division multiplexing (OFDM), originally employed in radio frequency communication, is considered as a strong candidate solution to combat with channel distortions. In this research, we investigate various potential OFDM forms that are suitable for IM/DD channel. We will elaborate the design principles of different OFDM transmitters and investigate different types of receivers including the proposed iterative receiver. In addition, we will analyze the spectral efficiency and decoding complexities of different OFDM systems to give a whole picture of their performance. Finally, simulation results are given to assess the detection performance of different receivers.

Orthogonal Frequency Division Multiplexing For Optical Communications Book PDF
✏Book Title : Orthogonal Frequency division Multiplexing for Optical Communications
✏Author :
✏Publisher : Stanford University
✏Release Date : 2011
✏Pages :
✏ISBN : STANFORD:yz748tf7178
✏Available Language : English, Spanish, And French

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✏Orthogonal Frequency division Multiplexing for Optical Communications Book Summary : The drive towards higher spectral efficiency and maximum power efficiency in optical systems has generated renewed interest in the optimization of optical transceivers. In this work, we study the different optical applications: Wide Area Networks (WANs), Metropolitan Area Networks (MANs), Local Area Networks (LANs) and Personal Area Networks (PANs). In WANs or long-haul systems, orthogonal frequency-division multiplexing (OFDM) can compensate for linear distortions, such as group-velocity dispersion (GVD) and polarization-mode dispersion (PMD), provided the cyclic prefix is sufficiently long. Typically, GVD is dominant, as it requires a longer cyclic prefix. Assuming coherent detection, we show how to analytically compute the minimum number of subcarriers and cyclic prefix length required to achieve a specified power penalty, trading off power penalties from the cyclic prefix and from residual inter-symbol interference (ISI) and inter-carrier interference (ICI). We derive an analytical expression for the power penalty from residual ISI and ICI. We also show that when nonlinear effects are present in the fiber, single-carrier with digital equalization outperforms OFDM for various dispersion maps. We also study the impairments of electrical to optical conversion when using Mach-Zehnder (MZ) modulators. OFDM has a high peak-to-average ratio (PAR), which can result in low optical power efficiency when modulated through a Mach-Zehnder (MZ) modulator. In addition, the nonlinear characteristic of the MZ can cause significant distortion on the OFDM signal, leading to in-band intermodulation products between subcarriers. We show that a quadrature MZ with digital pre-distortion and hard clipping is able to overcome the previous impairments. We consider quantization noise and compute the minimum number of bits required in the digital-to-analog converter (D/A). Finally, we discuss a dual-drive MZ as a simpler alternative for the OFDM modulator, but our results show that it requires a higher oversampling ratio to achieve the same performance as the quadrature MZ. In MANs, we discuss the use OFDM for combating GVD effects in amplified direct-detection (DD) systems using single-mode fiber. We review known direct-detection OFDM techniques, including asymmetrically clipped optical OFDM (ACO-OFDM), DC-clipped OFDM (DC-OFDM) and single-sideband OFDM (SSB-OFDM), and derive a linearized channel model for each technique. We present an iterative procedure to achieve optimum power allocation for each OFDM technique, since there is no closed-form solution for amplified DD systems. For each technique, we minimize the optical power required to transmit at a given bit rate and normalized GVD by iteratively adjusting the bias and optimizing the power allocation among the subcarriers. We verify that SSB-OFDM has the best optical power efficiency among the different OFDM techniques. We compare these OFDM techniques to on-off keying (OOK) with maximum-likelihood sequence detection (MLSD) and show that SSB-OFDM can achieve the same optical power efficiency as OOK with MLSD, but at the cost of requiring twice the electrical bandwidth and also a complex quadrature modulator. We compare the computational complexity of the different techniques and show that SSB-OFDM requires fewer operations per bit than OOK with MLSD. In LANs, we compare the performance of several OFDM schemes to that of OOK in combating modal dispersion in multimode fiber links. We review known OFDM techniques using intensity modulation with direct detection (IM/DD), including DC-OFDM, ACO-OFDM and pulse-amplitude modulated discrete multitone (PAM-DMT). We describe an iterative procedure to achieve optimal power allocation for DC-OFDM, and compare analytically the performance of ACO-OFDM and PAM-DMT. We also consider unipolar M-ary pulse-amplitude modulation (M-PAM) with minimum mean-square error decision-feedback equalization (MMSE-DFE). For each technique, we quantify the optical power

Orthogonal Frequency Division Multiplexing In Optical Communication Systems Book PDF
✏Book Title : ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING IN OPTICAL COMMUNICATION SYSTEMS
✏Author : Ashad Ullah Qureshi
✏Publisher : Concepts Books Publication
✏Release Date :
✏Pages : 58
✏ISBN :
✏Available Language : English, Spanish, And French

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✏ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING IN OPTICAL COMMUNICATION SYSTEMS Book Summary : Optical fiber communication has emerged as a high potential substitute for communication methods such as twisted pair and coaxial wire. The main advantage of optical fiber over previous methods is to have higher capacity of data rate transmission. The conventional types of modulation and demodulation technique, which have been used through optical fiber communication system are Wavelength Division Multiplexing (WDM) technique and Dense Wavelength Division Multiplexing (DWDM) technique so far. In this thesis, the Orthogonal Frequency Division Multiplexing (OFDM) is applied through the modulation and demodulation parts due to some advantages over WDM and DWDM to reach to 100 Gbps data transmission. The main advantage of OFDM-optical fiber is that it only needs one optical source to modulate and one optical source to demodulate the signals at transmitter side and receiver side, which results in a reduction of the cost of the system. Also, by using the OFDM, the chromatic dispersion can be eliminated or decreased. The first generation of optical fiber communication uses the Wavelength Division Multiplexing (WDM), which has become very popular. In this technique of modulation, optical carriers are modulated at different wavelengths into a single optical fiber, the Long-Haul WDM transmission system. For example, by using a 160 wavelength division multiplexing (WDM) channels of 85.4-Gb/s, the 25.6 Tb/s data are transmitted over 240 Km fiber on a 50-GHz channel spacing. At this study, RZDQPSK system is used with having 50% duty cycle of return to zero formats.

All Optical Communication System Based On Orthogonal Frequency Division Multiplexing Ofdm And Optical Time Division Multiplexing Otdm  Book PDF
✏Book Title : All optical Communication System Based on Orthogonal Frequency division Multiplexing OFDM and Optical Time division Multiplexing OTDM
✏Author : Héctor Cañibano Nuñez
✏Publisher :
✏Release Date : 2014
✏Pages :
✏ISBN : OCLC:1120394223
✏Available Language : English, Spanish, And French

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✏All optical Communication System Based on Orthogonal Frequency division Multiplexing OFDM and Optical Time division Multiplexing OTDM Book Summary : [ANGLÈS] We propose and demonstrate a novel principle that combines optical orthogonal frequency-division multiplexing (O-OFDM) and optical time-division multiplexing (OTDM). The principle is based on generating and time-multiplexing an OFDM symbol with a low duty-cycle, thus obtaining a higher aggregate bitrate. In principle the low duty-cycle OFDM symbol can be generated by pulse carving the symbol from a WDM source. In the receiver the obtained OTDM+OFDM signal is time-demultiplexed, which then allows frequency-demultiplexing the different subcarriers with an optical band-pass filter (OBPF). We have performed numerical simulations to identify the dependence of the performance on a number of parameters, for example to optimize the OBPF bandwidth. In an experimental demonstration, we achieve error-free performance for a 640 Gbits/s DPSK OFDM+OTDM signal based in a 50GHz spacing grid, yielding a spectral efficiency of 0,8 bit/Hz/s. Note that the OFDM symbol in the demonstration is achieved from a wavelength selective switch (WSS) based transmitter instead of by pulse carving a symbol from a WDM source.

Advanced Optical Communication Systems And Networks Book PDF
✏Book Title : Advanced Optical Communication Systems and Networks
✏Author : Milorad Cvijetic
✏Publisher : Artech House
✏Release Date : 2013-01-01
✏Pages : 804
✏ISBN : 9781608075553
✏Available Language : English, Spanish, And French

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✏Advanced Optical Communication Systems and Networks Book Summary : Providing straightforward practical guidance, this highly accessible resource presents today's most advanced topics on photonic communications. You get the latest details on 5th generation photonic systems that can be readily applied to your projects in the field. Moreover, the book provides valuable, time-saving tools for network simulation and modeling. You find in-depth coverage of optical signal transmission systems and networks. The book includes coverage of a wide range of critical methods and techniques, such as MIMO (multiple-input and multiple-output), OFDM (Orthogonal frequency-division multiplexing), and advanced modulation and coding. You find detailed discussions on the basic principles and applications of high-speed digital signal processing. Other key topics include advanced concepts on coded-modulation, turbo equalization, polarization-time coding, spatial-domain-based modulation and coding, and multidimensional signaling. This comprehensive book includes a complete set of problems at the end of each chapter to help you master the material.

Digital Signal Processing For High Speed Optical Communication Book PDF
✏Book Title : Digital Signal Processing for High Speed Optical Communication
✏Author : Jianjun Yu
✏Publisher : World Scientific Publishing Company
✏Release Date : 2018-03-09
✏Pages : 276
✏ISBN : 9789813233997
✏Available Language : English, Spanish, And French

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✏Digital Signal Processing for High Speed Optical Communication Book Summary :

Optical Fiber And Wireless Communications Book PDF
✏Book Title : Optical Fiber and Wireless Communications
✏Author : Rastislav Róka
✏Publisher : BoD – Books on Demand
✏Release Date : 2017-06-21
✏Pages : 372
✏ISBN : 9789535132752
✏Available Language : English, Spanish, And French

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✏Optical Fiber and Wireless Communications Book Summary : 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.

High Spectral Density Optical Communication Technologies Book PDF
✏Book Title : High Spectral Density Optical Communication Technologies
✏Author : Masataka Nakazawa
✏Publisher : Springer Science & Business Media
✏Release Date : 2010-08-12
✏Pages : 338
✏ISBN : 3642104193
✏Available Language : English, Spanish, And French

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✏High Spectral Density Optical Communication Technologies Book Summary : The growth of Internet traf?c in recent years surpassed the prediction of one decade ago. Data stream in individual countries already reached terabit/s level. To cope with the petabit class demands of traf?c in coming years the communication engineers are required to go beyond the incremental improvement of today’s technology. A most promising breakthrough would be the introduction of modulation f- mats enabling higher spectral ef?ciency than that of binary on–off keying scheme, virtually the global standard of ?ber-optic communication systems. In wireless communication systems, techniques of high spectral density modulation have been well developed, but the required techniques in optical frequency domain are much more complicated because of the heavier ?uctuation levels. Therefore the past trials of coherent optical modulation/detection schemes were not successful. However, the addition of high-speed digital signal processing technology is the fundam- tal difference between now and two decades ago, when trials of optical coherent communication systems were investigated very seriously. This approach of digital coherent technology has attracted keen interest among communication specialists, as indicated by the rapid increase in the pioneering presentations at the post-deadline sessions of major international conferences. For example, 32 terabit/s transmission in a ?ber experiment based on this technology was reported in post-deadline session of Optical Fiber Communication Conference (OFC) 2009. The advancement of the digital coherent technologies will inevitably affect the network architecture in terms of the network resource management for the new generation photonic networks, rather than will simply provide with huge transmission capacity.

Advanced Optical And Wireless Communications Systems Book PDF
✏Book Title : Advanced Optical and Wireless Communications Systems
✏Author : Ivan B. Djordjevic
✏Publisher : Springer
✏Release Date : 2017-12-28
✏Pages : 942
✏ISBN : 9783319631516
✏Available Language : English, Spanish, And French

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✏Advanced Optical and Wireless Communications Systems Book Summary : This textbook introduces the advanced topics of: (i) wireless communications, (ii) free-space optical (FSO) communications, (iii) indoor optical wireless (IR) communications, and (iv) fiber-optics communications and presents these different types of communication systems in a unified fashion for better practical use. Fundamental concepts, such as propagation principles, modulation formats, channel coding, diversity principles, MIMO signal processing, multicarrier modulation, equalization, adaptive modulation and coding, detection principles, and software defined transmission are first described and then followed up with a detailed look at each particular system. The book is self-contained and structured to provide straightforward guidance to readers looking to capture fundamentals and gain theoretical and practical knowledge about wireless communications, optical communications, and fiber-optics communications, all which can be readily applied in studies, research, and practical applications. The textbook is intended for an upper undergraduate or graduate level course in optical communication. It features problems, an appendix with all background material needed, and homework.

Advances In Optical Communication Book PDF
✏Book Title : Advances in Optical Communication
✏Author : Narottam Das
✏Publisher : BoD – Books on Demand
✏Release Date : 2014-11-19
✏Pages : 226
✏ISBN : 9789535117308
✏Available Language : English, Spanish, And French

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✏Advances in Optical Communication Book Summary : High-speed optical communication is very much useful in telecommunication systems, data processing and networking. It consists of a transmitter that encodes a message into an optical signal, a channel that carries this optical signal to its desired destination, and a receiver that reproduces the message from the received optical signal. It presents up to date results on communication systems, along with the explanations of their relevance, from leading researchers in this field. The chapters of this book cover general concepts of high-speed optical communication, optical devices used optical communication, and optical communication systems. In recent years, optical devices and other enhanced signal processing functions are also considered in depth for high-speed optical communications systems. Commonly used optical devices are light emitting diodes and photodetectors. This book is targeted at research, development and design engineers from the teams in manufacturing industry, academia and telecommunication industries.

Digital Optical Communications Book PDF
✏Book Title : Digital Optical Communications
✏Author : Le Nguyen Binh
✏Publisher : CRC Press
✏Release Date : 2008-11-20
✏Pages : 580
✏ISBN : 9781420082067
✏Available Language : English, Spanish, And French

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✏Digital Optical Communications Book Summary : The need for advanced transmission techniques over long haul optically amplified communications has prompted a convergence of digital and optical communications. Digital Optical Communications explores the practical applications of this union and applies digital modulation techniques to optical communications systems.After reviewing the fundamental

📒Ofdm ✍ Hermann Rohling

Ofdm Book PDF
✏Book Title : OFDM
✏Author : Hermann Rohling
✏Publisher : Springer Science & Business Media
✏Release Date : 2011-03-22
✏Pages : 254
✏ISBN : 3642174965
✏Available Language : English, Spanish, And French

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✏OFDM Book Summary : (Preliminary): The Orthogonal Frequency Division Multiplexing (OFDM) digital transmission technique has several advantages in broadcast and mobile communications applications. The main objective of this book is to give a good insight into these efforts, and provide the reader with a comprehensive overview of the scientific progress which was achieved in the last decade. Besides topics of the physical layer, such as coding, modulation and non-linearities, a special emphasis is put on system aspects and concepts, in particular regarding cellular networks and using multiple antenna techniques. The work extensively addresses challenges of link adaptation, adaptive resource allocation and interference mitigation in such systems. Moreover, the domain of cross-layer design, i.e. the combination of physical layer aspects and issues of higher layers, are considered in detail. These results will facilitate and stimulate further innovation and development in the design of modern communication systems, based on the powerful OFDM transmission technique.

📒Optical Ofdm Systems ✍ Kamaljit Singh Bhatia

Optical Ofdm Systems Book PDF
✏Book Title : Optical OFDM Systems
✏Author : Kamaljit Singh Bhatia
✏Publisher : LAP Lambert Academic Publishing
✏Release Date : 2013
✏Pages : 76
✏ISBN : 3659347760
✏Available Language : English, Spanish, And French

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✏Optical OFDM Systems Book Summary : This book intends to give a coherent and comprehensive introduction to the fundamentals of OFDM signal processing and coding, with a distinctive focus on its broad range of applications. It is designed for two diverse groups of researchers: (1) optical communication engineers who are proficient in optical science and interested in applying OFDM technology, but who are intimidated by sophisticated OFDM terminologies, and (2) wireless communication engineers who are content with their DSP skill set, but are disoriented by a perceived huge gap between the optical and radio-frequency (RF) communications worlds. We have attempted to make the individual chapters self-contained while maintaining the flow and connectivity between them

Papr Reduction For Ofdm In Optical Wireless Communication Systems Book PDF
✏Book Title : PAPR Reduction for OFDM in Optical Wireless Communication Systems
✏Author : Funmilayo Bimpe Ogunkoya
✏Publisher :
✏Release Date : 2016
✏Pages :
✏ISBN : OCLC:1065339580
✏Available Language : English, Spanish, And French

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✏PAPR Reduction for OFDM in Optical Wireless Communication Systems Book Summary :

Free Space Optical Communication Book PDF
✏Book Title : Free Space Optical Communication
✏Author : Hemani Kaushal
✏Publisher : Springer
✏Release Date : 2017-01-06
✏Pages : 209
✏ISBN : 9788132236917
✏Available Language : English, Spanish, And French

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✏Free Space Optical Communication Book Summary : This book provides an in-depth understanding of free space optical (FSO) communication with a particular emphasis on optical beam propagation through atmospheric turbulence. The book is structured in such a way that it provides a basic framework for the beginners and also gives a concise description from a designer’s perspective. The book provides an exposure to FSO technology, fundamental limitations, design methodologies, system trade-offs, acquisition, tracking and pointing (ATP) techniques and link-feasibility analysis. The contents of this book will be of interest to professionals and researchers alike. The book may also be used as a textbook for engineering coursework and professional training.

📒Coding For Optical Channels ✍ Ivan Djordjevic

Coding For Optical Channels Book PDF
✏Book Title : Coding for Optical Channels
✏Author : Ivan Djordjevic
✏Publisher : Springer Science & Business Media
✏Release Date : 2010-04-05
✏Pages : 444
✏ISBN : 1441955690
✏Available Language : English, Spanish, And French

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✏Coding for Optical Channels Book Summary : In order to adapt to the ever-increasing demands of telecommunication needs, today’s network operators are implementing 100 Gb/s per dense wavelength division multiplexing (DWDM) channel transmission. At those data rates, the performance of fiberoptic communication systems is degraded significantly due to intra- and inter-channel fiber nonlinearities, polarization-mode dispersion (PMD), and chromatic dispersion. In order to deal with those channel impairments, novel advanced techniques in modulation and detection, coding and signal processing are needed. This unique book represents a coherent and comprehensive introduction to the fundamentals of optical communications, signal processing and coding for optical channels. It is the first to integrate the fundamentals of coding theory with the fundamentals of optical communication.

Impact Of Nonlinearities On Fiber Optic Communications Book PDF
✏Book Title : Impact of Nonlinearities on Fiber Optic Communications
✏Author : Shiva Kumar
✏Publisher : Springer Science & Business Media
✏Release Date : 2011-03-23
✏Pages : 544
✏ISBN : 144198139X
✏Available Language : English, Spanish, And French

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✏Impact of Nonlinearities on Fiber Optic Communications Book Summary : This book covers the recent progress in fiber-optic communication systems with a main focus on the impact of fiber nonlinearities on the system performance. Over the past few years, there has been significant progress in coherent communication systems mainly because of the advances in digital signal processing techniques. This has led to renewed interest in fiber linear and nonlinear impairments and techniques to mitigate them in electrical domain. In this book, the reader will find all the important topics of fiber optic communication systems in one place with in-depth coverage by the experts of each subtopics. Pioneers from each of the sub-topics have been invited to contribute. Each chapter will have a section on fundamentals, review of literature survey and the recent developments. The reader will benefit from this approach since many of the conference proceedings and journal articles mainly focus on the authors’ research work without spending space on preliminaries.

Iterative Receiver For Flip Ofdm In Optical Wireless Communication Book PDF
✏Book Title : Iterative Receiver for Flip OFDM in Optical Wireless Communication
✏Author : Shiva Shankar Reddy Borra
✏Publisher :
✏Release Date : 2016
✏Pages : 58
✏ISBN : 1339925079
✏Available Language : English, Spanish, And French

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✏Iterative Receiver for Flip OFDM in Optical Wireless Communication Book Summary : Abstract: Intensity Modulation and Direct Detection (IM/DD) is a traditional technique commonly used in Optical Wireless Communication (OWC) systems. However, this detection technique being non-coherent, either partially or completely, suppresses the negative data segment resulting in signal distortions. Flip-OFDM handles the constraints of IM/DD in OWC systems. The conventional receivers for flip-OFDM subtracts the negative data segment from the positive segment. As the noise variance increases, the receiver performance degrades. The iterative receiver is a new receiver structure introduced for flip-OFDM systems where the negative signal segment is concatenated to the positive segment. The technique estimates transmitted data, which ensures an optimum detection receiver performance. This technique is implemented for QAM (16, 64, and 256), BPSK and QPSK modulation schemes and the results for Line-Of-Sight (LOS), Non Line-Of-Sight (NLOS) and Stanford University Interim (SUI) channels are produced. Simulations prove that the iterative receiver provided SNR improvement over a conventional receiver.

Enabling Technologies For High Spectral Efficiency Coherent Optical Communication Networks Book PDF
✏Book Title : Enabling Technologies for High Spectral efficiency Coherent Optical Communication Networks
✏Author : Xiang Zhou
✏Publisher : John Wiley & Sons
✏Release Date : 2016-04-11
✏Pages : 648
✏ISBN : 9781118714768
✏Available Language : English, Spanish, And French

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✏Enabling Technologies for High Spectral efficiency Coherent Optical Communication Networks Book Summary : Since the revival of coherent optical communications in 2006, significant progress has been made in the field. For example, spectral efficiency of optical communication systems has been increased from 0.8 b/s/Hz to over 14.0 b/s/Hz in a single mode fiber. This progress is the result of improved technologies such as advanced modulation, digital coherent detection, coding, and digital signal processing. The first part of the book is devoted to advanced modulation, coding, and multiplexing technologies. Various linear and nonlinear impairments and their digital mitigation methods are presented, followed by impairment-tolerant and hardware-efficient symbol and carrier recovery algorithms, plus issues and challenges in real-time implementation of high-speed digital coherent transceivers. The authors reveal important progress in photonic integration and performance monitoring, and look beyond WDM (wavelength division multiplexing) to space-division-multiplexing (SDM) based technologies, which can improve fiber and network capacity.

Ofdm Based Rf And Optical Wireless Systems Book PDF
✏Book Title : OFDM Based RF and Optical Wireless Systems
✏Author : Bilal Ranjha
✏Publisher :
✏Release Date : 2014
✏Pages :
✏ISBN : OCLC:904727167
✏Available Language : English, Spanish, And French

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✏OFDM Based RF and Optical Wireless Systems Book Summary : Orthogonal frequency division multiplexing (OFDM) is currently being used predominantly in radio frequency (RF) mobile broadband communication systems because of its ability to combat inter-symbol interference (ISI) and robustness against frequency selective fading caused by multipath wireless channel. Wireless mobile standards like 3G and 4G long term evolution (LTE) use orthogonal frequency division multiple access (OFDMA) as a multiplexing/modulation scheme. Despite its many advantages like single tap frequency domain equalization and fast discrete time implementation, OFDM suffers from certain disadvantages like high peak-to-average power ratio (PAPR) and high sensitivity to carrier frequency offset (CFO). Although OFDM has solved problems like multipath fading but it cannot solve the emerging problems like scarcity of RF spectrum for mobile wireless broadband applications. Optical wireless (OW) communication has recently gained a lot of attention as a candidate to complement RF communication. It offers advantages like virtually infinite bandwidth, data security and use of low cost transmitters and receivers like solid state light emitting diodes (LEDs) and optical detectors. OFDM is also being considered as a candidate for visible light communication (VLC) as it offers robustness against multipath caused by diffuse indoor OW channel. One way to realize VLC is intensity modulation direct detection (IM/DD). Although the major difference between RF and OW based OFDM lies in the front end of transmitter and receiver, but due to the unipolar nature of optical intensity in IM/DD system, methods of generating baseband OFDM signal, techniques to reduce PAPR and timing synchronization schemes for RF cannot be directly applied to optical OFDM systems and therefore must be revisited. Therefore, in this thesis, we will first look into the interference caused by CFO in RF based OFDMA system and will analyze the characteristics of this interference for two mapping subcarrier strategies. We will explicitly calculate SINR expression for OFDMA based systems and analyze two types of symbol mapping strategies and characterize interferences due to CFO for each scheme. We will also develop some techniques to reduce high PAPR in OFDM based OW systems since the non-linear characteristics of LED transmitters can severely affect system performance. We will look into various precoding based PAPR reduction techniques. We will then analyze performance of various OFDM based OW schemes in multipath diffuse indoor wireless channel. We will compare performance of conventional schemes with a precoded version. We will then describe in detail our newly proposed power and spectrally efficient hybrid asymmetrically clipped optical orthogonal frequency division multiplexing (HACO-OFDM) system and compare its performance with previously proposed schemes. Finally, we will present details of our newly proposed timing synchronization scheme for power efficient asymmetrically clipped (AC) OW OFDM systems. Detailed performance analysis will be presented and a comparison will be developed. Simulation results show that our proposed scheme outperforms all other timing synchronization techniques and exhibits perfect accuracy even at very low signal-to-noise ratio (SNR). Besides performance, our scheme works perfectly for multiple AC OW which proves its high versatility.

Optical Communication Systems Book PDF
✏Book Title : Optical Communication Systems
✏Author : Andrew Ellis
✏Publisher : CRC Press
✏Release Date : 2019-09-02
✏Pages : 358
✏ISBN : 9780429648267
✏Available Language : English, Spanish, And French

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✏Optical Communication Systems Book Summary : Telecommunications have underpinned social interaction and economic activity since the 19th century and have been increasingly reliant on optical fibers since their initial commercial deployment by BT in 1983. Today, mobile phone networks, data centers, and broadband services that facilitate our entertainment, commerce, and increasingly health provision are built on hidden optical fiber networks. However, recently it emerged that the fiber network is beginning to fill up, leading to the talk of a capacity crunch where the capacity still grows but struggles to keep up with the increasing demand. This book, featuring contributions by the suppliers of widely deployed simulation software and academic authors, illustrates the origins of the limited performance of an optical fiber from the engineering, physics, and information theoretic viewpoints. Solutions are then discussed by pioneers in each of the respective fields, with near-term solutions discussed by industrially based authors, and more speculative high-potential solutions discussed by leading academic groups.

Digital Signal Processing In High Speed Optical Fiber Communication Principle And Application Book PDF
✏Book Title : Digital Signal Processing In High Speed Optical Fiber Communication Principle and Application
✏Author : Jianjun Yu
✏Publisher : Springer Nature
✏Release Date :
✏Pages :
✏ISBN : 9789811530982
✏Available Language : English, Spanish, And French

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✏Digital Signal Processing In High Speed Optical Fiber Communication Principle and Application Book Summary :

Advanced Digital Optical Communications Book PDF
✏Book Title : Advanced Digital Optical Communications
✏Author : Le Nguyen Binh
✏Publisher : CRC Press
✏Release Date : 2017-11-22
✏Pages : 937
✏ISBN : 9781482226539
✏Available Language : English, Spanish, And French

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✏Advanced Digital Optical Communications Book Summary : This second edition of Digital Optical Communications provides a comprehensive treatment of the modern aspects of coherent homodyne and self-coherent reception techniques using algorithms incorporated in digital signal processing (DSP) systems and DSP-based transmitters to overcome several linear and nonlinear transmission impairments and frequency mismatching between the local oscillator and the carrier, as well as clock recovery and cycle slips. These modern transmission systems have emerged as the core technology for Tera-bits per second (bps) and Peta-bps optical Internet for the near future. Featuring extensive updates to all existing chapters, Advanced Digital Optical Communications, Second Edition: Contains new chapters on optical fiber structures and propagation, optical coherent receivers, DSP equalizer algorithms, and high-order spectral DSP receivers Examines theoretical foundations, practical case studies, and MATLAB® and Simulink® models for simulation transmissions Includes new end-of-chapter practice problems and useful appendices to supplement technical information Downloadable content available with qualifying course adoption Advanced Digital Optical Communications, Second Edition supplies a fundamental understanding of digital communication applications in optical communication technologies, emphasizing operation principles versus heavy mathematical analysis. It is an ideal text for aspiring engineers and a valuable professional reference for those involved in optics, telecommunications, electronics, photonics, and digital signal processing.

Performance Analysis Of Optical Ofdm Transmission Systems Using Papr Mitigation Techniques And Alternative Transforms Book PDF
✏Book Title : Performance Analysis of Optical OFDM Transmission Systems Using PAPR Mitigation Techniques and Alternative Transforms
✏Author : Laia Nadal Reixats
✏Publisher :
✏Release Date : 2012
✏Pages :
✏ISBN : OCLC:1120355954
✏Available Language : English, Spanish, And French

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✏Performance Analysis of Optical OFDM Transmission Systems Using PAPR Mitigation Techniques and Alternative Transforms Book Summary : [ANGLÈS] Optical orthogonal division multiplexing (OFDM) has recently been introduced in optical communications because of its robustness against channel dispersion and its high spectral efficiency. OFDM is based on the fast Fourier transform (FFT). In this thesis, we study alternative transforms to create the OFDM symbols: the fast Hartley transform (FHT) and the discrete Wavelet packet transform (DWPT). Besides the advantages of using optical OFDM (O-OFDM), there are also some disadvantages that must be taken into account. High peak-to-average power ratio (PAPR) is one of the major drawbacks of OFDM-based systems that can cause intermodulation among the subcarriers due to the nonlinearities of the fiber and devices such as analog-to-digital converters (ADC) and external modulators. Here, PAPR reduction techniques are studied to mitigate the effects of the PAPR. Finally, we demonstrate that applying PAPR reduction techniques to O-OFDM systems using intensity modulation and direct detection (IM/DD) the effects of the clipping noise are mitigated without the need of adding a higher bias to the signal.

Advanced Technologies For Next Generation Coherent Optical Communications Book PDF
✏Book Title : Advanced Technologies for Next Generation Coherent Optical Communications
✏Author : Qunbi Zhuge
✏Publisher :
✏Release Date : 2015
✏Pages :
✏ISBN : OCLC:922582695
✏Available Language : English, Spanish, And French

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✏Advanced Technologies for Next Generation Coherent Optical Communications Book Summary : "Next generation coherent optical transports for core networks are anticipated to further approach the Shannon limit for a higher fiber capacity by delivering 400 Gb/s or 1 Tb/s data rates per channel, and providing flexibility and agility to maximize the network resource utilization. This thesis looks into novel system architectures and digital signal processing (DSP) algorithms to fulfill those design targets. The single carrier and orthogonal frequency-division multiplexing (OFDM) modulation schemes are both potential candidates for the underlying transceiver architecture. We provide the analysis and investigation of the optical channel impairments for both systems in the context of >100 Gb/s transmissions with higher symbol rates and higher order quadrature amplitude modulation (QAM). With an increased accumulated chromatic dispersion (CD) for a single channel, the impacts of laser phase noise and fiber nonlinearities manifest new characteristics which are not evident in current 100G systems. We propose novel and energy-efficient DSP algorithms and system designs to increase laser linewidth tolerance and reduce nonlinear noise. The performances of the proposed designs are experimentally evaluated using a leading-edge optical long-haul transmission testbed, which was custom built for this thesis. The single carrier and OFDM systems are separately explored and compared, and it is shown that OFDM has certain multi-carrier advantages when a large accumulated CD exists. This result implies that the OFDM scheme may be a better option for next generation transceivers than the currently employed 100G single carrier transceiver scheme. In the last part, we concentrate on the design of flexible optical transceivers for future software-defined optical networks. The following novel techniques are proposed to achieve a full flexibility without increasing the cost: format-transparent DSP platform, agile bandwidth allocation, and continuous modulation format." --

📒Optimization Of Optical Ofdm Transmission Systems ✍ Cristóbal Manuel Romero Vidal

Optimization Of Optical Ofdm Transmission Systems Book PDF
✏Book Title : Optimization of Optical OFDM Transmission Systems
✏Author : Cristóbal Manuel Romero Vidal
✏Publisher :
✏Release Date : 2012
✏Pages :
✏ISBN : OCLC:1120647231
✏Available Language : English, Spanish, And French

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✏Optimization of Optical OFDM Transmission Systems Book Summary : Orthogonal frequency division multiplexing (OFDM) is a well-known modulation technique which is used in broadband wired and wireless communication systems, such as standard 802.11a/b/g/n, digital video broadcasting television (DVB-TV), and Long Term Evolution in the next mobile generation, due to its capacity in solving the problem of the Inter-symbol Interference caused by the effects of a dispersive channel. Since a few years ago, this technique has been used in optical communications which is the aim of this thesis. In this Master Thesis, the most relevant aspects of optical OFDM communication are described and implemented in optical simulation software called VPItransmissionMakerTM and VPIphotonicsAnalyzerTM, (VPI). We find out that the OFDM coder and decoder provided by this program cannot be upgraded. This handicap does not allow modifying the main work algorithm and therefore the system cannot be improved. To solve this problem, it has been designed a Matlab OFDM coder and decoder to study the behaviour of optical OFDM systems using Intensity Modulation (IM) and Direct Detection (DD). As it will be detailed along the thesis, two different optical OFDM simulation scenarios using IM/DD are developed: an IM/DD RF and Hermitian Symmetry demos. Both of them are optical OFDM systems with an intensity modulation transmission and direct detection. The focus has been set primarily in obtaining a flexible, efficient and user-friendly simulation platform allowing for straightforward setup of advanced simulation of optical OFDM systems. The performance of these two scenarios is studied, taking advantage from the Simulation Script which VPI software provided in a more manageable mode, specifically, scripts using Tcl/tk language have been developed to derive power budget plots at desired Bit Error Ratio (BER).

European Optical Communications And Networks Book PDF
✏Book Title : European optical communications and networks
✏Author :
✏Publisher : Information Gatekeepers Inc
✏Release Date : 1995
✏Pages : 253
✏ISBN : 3905084392
✏Available Language : English, Spanish, And French

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✏European optical communications and networks Book Summary :

Spatial Ofdm For Pixelated Mimo Optical Wireless Communication Systems Book PDF
✏Book Title : Spatial OFDM for Pixelated MIMO Optical Wireless Communication Systems
✏Author : Md Rubaiyat Hossain Mondal
✏Publisher :
✏Release Date : 2014
✏Pages : 338
✏ISBN : OCLC:1011512053
✏Available Language : English, Spanish, And French

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✏Spatial OFDM for Pixelated MIMO Optical Wireless Communication Systems Book Summary : Recently, the demand for high speed wireless multimedia services has grown to an unprecedented level. Multiple-input multiple-output (MIMO) optical wireless communication (OWC) can be an excellent supplemental technology to radio frequency (RF) links to achieve high transmission rates. MIMO OWC has the potential for many applications including secure data communications, mobile advertisements, data exchange in dense high-contention scenarios, and in intelligent transportation systems (ITS). One form of MIMO OWC is a pixelated imaging system which transmits information via a series of pixelated image frames. Such systems have the potential to provide high transmission rates by exploiting spatial diversity at a large scale. For pixelated OWC, a liquid crystal display (LCD) screen or a pixelated grid of light-emitting diodes (LEDs) can be used as a transmitter, while a camera or an imaging lens along with an array of photodiodes can be used as a receiver. In order to be resilient to spatial distortions, pixelated systems can encode data using spatial orthogonal frequency division multiplexing (spatial OFDM) which is an extension of the concept of conventional OFDM to the 2-D spatial domain. Spatial DC biased optical OFDM (SDCO-OFDM) has been described in the literature for pixelated systems. Due to the attractive features mentioned above, spatial OFDM based pixelated systems can be promising candidates for next-generation OWC. However, the technology is still in its infancy and faces a number of challenges including power constraints, linear misalignment error, defocus blur and illumination fall-off known as vignetting. In this research, a novel modulation technique termed spatial asymmetrically clipped optical OFDM (SACO-OFDM) is presented for pixelated OWC. Misalignment, defocus, and vignetting are then modelled and their effects on spatial OFDM are analysed. Different signal processing techniques are applied to reduce the effects of these impairments. The joint impact of misalignment, defocus and vignetting on SACO-OFDM and SDCO-OFDM are then presented analytically and through simulations. The optimum choice of DC bias for SDCO-OFDM for a pixelated system is also presented. For the cases considered and for a given data rate, the proposed SACO-OFDM is shown to be more optically power- efficient than the existing SDCO-OFDM.

Optical Communications And Networking Book PDF
✏Book Title : Optical Communications and Networking
✏Author : Zhongqi Pan
✏Publisher : MDPI
✏Release Date : 2020-03-10
✏Pages : 132
✏ISBN : 9783039282586
✏Available Language : English, Spanish, And French

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✏Optical Communications and Networking Book Summary : In the past few decades, the optical communication industry has explored multiple degrees of freedom of the photon, such as time, wavelength, amplitude, phase, polarization, and space, to significantly reduce the cost/bit of data transmission by increasing the capacity per fiber through multiplexing technology and by reducing the size and power through electronic and photonic integration. This book aims to explore the latest advancements in this industry, including the technologies in devices, systems, and network levels with applications from short-reach chip-to-chip interconnections to long-haul backbone communications at the trans-oceanic distance.