Advanced Digital Filtering Techniques for Mitigation of Linear and Nonlinear Impairments in Coherent Optical Transmission Systems
Advanced Digital Filtering Techniques for Mitigation of Linear and Nonlinear Impairments in Coherent Optical Transmission Systems

Author: Xian Xu

Publisher:

Published: 2016

Total Pages:

ISBN-13:

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"Enabled by coherent detection and advanced digital signal processing techniques, next generation optical networks embrace such characteristics as ultra high capacity, ultra long transmission reach, agile yet cost-effective. Digital linear filtering is an indispensable technique that facilitates the advancement of coherent optical transmission systems. Currently, most digital linear filtering techniques are employed for mitigation or compensation for linear impairments, such as chromatic dispersion compensation, channel equalization and spectrally efficient pulse shaping. This thesis explores the potential of digital linear filtering techniques for mitigating both linear and nonlinear impairments in the fiber-optic transmissions.Polarization division multiplexed (PDM) high order quadrature amplitude modulation (QAM) provides a spectrally efficient solution for coherent optical transmission systems. PDM technique uses blind equalizers for polarization demultiplexing. We propose the decision directed least radius distance (DD LRD) blind equalizer for coherent optical transmission systems. Compared to other equalizers, the DD-LRD equalizer is found to have good steady state bit error rate (BER), better tolerance to high speed polarization rotation, excellent inter symbol interference (ISI) tolerance and less sensitivity to initial conditions. Pulse shaping is traditionally utilized for increasing spectral efficiency. We propose a new family of pulses, called frequency domain root M-shape pulses (RMP), to mitigate Kerr nonlinearity in the fiber channel. Experimental and simulation demonstrations reveal that compared to the widely used root raised cosine (RRC) pulses, the RMP can significantly extend the transmission reach in standard single mode fiber based dispersion unmanaged links and most legacy links using various fiber types and dispersion maps. The enhanced nonlinearity tolerance of the RMP is attributed to the fact that the RMP put more energy contents in their higher spectral components and disperse faster in a dispersive medium. In comparison with other nonlinearity mitigation or compensation algorithms, the RMP filtering technique embraces the following advantages for next generation optical networks: computationally efficient, link configuration independent and modulation format transparent." --

Advanced Optical Communication Systems and Networks
Advanced Optical Communication Systems and Networks

Author: Milorad Cvijetic

Publisher: Artech House

Published: 2013

Total Pages: 824

ISBN-13: 1608075559

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This resource provides the latest details on 5th generation photonic systems that can be readily applied to projects in the field. Moreover, the book provides valuable, time-saving tools for network simulation and modeling. It includes coverage of optical signal transmission systems and networks; a wide range of critical methods and techniques, such as MIMO (multiple-input and multiple-output) by employing spatial modes in few-mode and multicore optical fiber; OFDM (orthogonal frequency-division multiplexing) utilized to enhance the spectral efficiency and to enable elastic optical networking schemes; and advanced modulation and coding schemes to approach the Shannon's channel capacity limit. There are detailed discussions on the basic principles and applications of high-speed digital signal processing, as well as description of the most relevant post-detection compensation techniques

Advanced DSP Techniques for High-Capacity and Energy-Efficient Optical Fiber Communications
Advanced DSP Techniques for High-Capacity and Energy-Efficient Optical Fiber Communications

Author: Zhongqi Pan

Publisher: MDPI

Published: 2019-12-03

Total Pages: 150

ISBN-13: 3039217925

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The rapid proliferation of the Internet has been driving communication networks closer and closer to their limits, while available bandwidth is disappearing due to an ever-increasing network load. Over the past decade, optical fiber communication technology has increased per fiber data rate from 10 Tb/s to exceeding 10 Pb/s. The major explosion came after the maturity of coherent detection and advanced digital signal processing (DSP). DSP has played a critical role in accommodating channel impairments mitigation, enabling advanced modulation formats for spectral efficiency transmission and realizing flexible bandwidth. This book aims to explore novel, advanced DSP techniques to enable multi-Tb/s/channel optical transmission to address pressing bandwidth and power-efficiency demands. It provides state-of-the-art advances and future perspectives of DSP as well.

Kalman Filters
Kalman Filters

Author: Ginalber Luiz Serra

Publisher: BoD – Books on Demand

Published: 2018-02-21

Total Pages: 315

ISBN-13: 9535138278

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This book presents recent issues on theory and practice of Kalman filters, with a comprehensive treatment of a selected number of concepts, techniques, and advanced applications. From an interdisciplinary point of view, the contents from each chapter bring together an international scientific community to discuss the state of the art on Kalman filter-based methodologies for adaptive/distributed filtering, optimal estimation, dynamic prediction, nonstationarity, robot navigation, global navigation satellite systems, moving object tracking, optical communication systems, and active power filters, among others. The theoretical and methodological foundations combined with extensive experimental explanation make this book a reference suitable for students, practicing engineers, and researchers in sciences and engineering.

Fundamentals of Nonlinear Digital Filtering
Fundamentals of Nonlinear Digital Filtering

Author: Jaakko Astola

Publisher: CRC Press

Published: 2020-09-10

Total Pages: 288

ISBN-13: 1000102610

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Fundamentals of Nonlinear Digital Filtering is the first book of its kind, presenting and evaluating current methods and applications in nonlinear digital filtering. Written for professors, researchers, and application engineers, as well as for serious students of signal processing, this is the only book available that functions as both a reference handbook and a textbook. Solid introductory material, balanced coverage of theoretical and practical aspects, and dozens of examples provide you with a self-contained, comprehensive information source on nonlinear filtering and its applications.

Advanced Digital Optical Communications
Advanced Digital Optical Communications

Author: Le Nguyen Binh

Publisher: CRC Press

Published: 2017-11-22

Total Pages: 937

ISBN-13: 1482226537

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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.

Advanced Optical and Wireless Communications Systems
Advanced Optical and Wireless Communications Systems

Author: Ivan B. Djordjevic

Publisher: Springer Nature

Published: 2022-06-21

Total Pages: 794

ISBN-13: 3030984915

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The new edition of this popular textbook keeps its structure, introducing the advanced topics of: (i) wireless communications, (ii) free-space optical (FSO) communications, (iii) indoor optical wireless (IR) communications, and (iv) fiber-optics communications, but thoroughly updates the content for new technologies and practical applications. The author presents 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, first describing them and then following 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, free-space 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 courses in fiber-optics communication, wireless communication, and free-space optical communication problems, an appendix with all background material needed, and homework problems. In the second edition, in addition to the existing chapters being updated and problems being inserted, one new chapter has been added, related to the physical-layer security thus covering both security and reliability issues. New material on 5G and 6G technologies has been added in corresponding chapters.

Nonlinear Digital Filters
Nonlinear Digital Filters

Author: Ioannis Pitas

Publisher: Springer Science & Business Media

Published: 2013-03-14

Total Pages: 402

ISBN-13: 1475760175

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The function of a filter is to transform a signal into another one more suit able for a given purpose. As such, filters find applications in telecommunica tions, radar, sonar, remote sensing, geophysical signal processing, image pro cessing, and computer vision. Numerous authors have considered deterministic and statistical approaches for the study of passive, active, digital, multidimen sional, and adaptive filters. Most of the filters considered were linear although the theory of nonlinear filters is developing rapidly, as it is evident by the numerous research papers and a few specialized monographs now available. Our research interests in this area created opportunity for cooperation and co authored publications during the past few years in many nonlinear filter families described in this book. As a result of this cooperation and a visit from John Pitas on a research leave at the University of Toronto in September 1988, the idea for this book was first conceived. The difficulty in writing such a mono graph was that the area seemed fragmented and no general theory was available to encompass the many different kinds of filters presented in the literature. However, the similarities of some families of nonlinear filters and the need for such a monograph providing a broad overview of the whole area made the pro ject worthwhile. The result is the book now in your hands, typeset at the Department of Electrical Engineering of the University of Toronto during the summer of 1989.

Digital Phase Impairment Compensation Methods for Wideband Coherent Optical Fiber Communication Systems
Digital Phase Impairment Compensation Methods for Wideband Coherent Optical Fiber Communication Systems

Author: Gil Paryanti

Publisher:

Published: 2021

Total Pages:

ISBN-13:

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The goal of this thesis is to propose new methods for extending the transmitter and receiver impairments compensation to include phase distortions as an inherent part, and to be general enough so that it would allow for future scaling to more complex distortions. The research described in this thesis analyzes the major phase impairments in a coherent optical system and proposes new ways for compensating them either in the transmitter using digital pre-distortion techniques or in the receiver using post-distortion or equalization. The approach taken is to be as inclusive as possible, meaning that phase impairments are learned as part of the overall amplitude and phase distortion, and the proposed solution should be scalable and be able to compensate for possible future distortions.

Optical Filter Design and Analysis
Optical Filter Design and Analysis

Author: Christi K. Madsen

Publisher: Wiley-Interscience

Published: 1999-06-15

Total Pages: 432

ISBN-13: 9780471183730

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A Unique, Cutting-Edge Approach to Optical Filter Design With more and more information being transmitted over fiber-optic lines, optical filtering has become crucial to the advanced functionality of today's communications networks. Helping researchers and engineers keep pace with this rapidly evolving technology, this book presents digital processing techniques for optical filter design. This higher-level approach focuses on filter characteristics and enables readers to quickly calculate the filter response as well as tackle larger and more complex filters. The authors incorporate numerous theoretical and experimental results from the literature and discuss applications to a variety of systems-including the new wavelength division multiplexing (WDM) technology, which is fast becoming the preferred method for system upgrade and expansion. Special features of this book include: * The theory underlying various architectures that can approximate any filter function * Filter design techniques applicable to a broad range of materials systems-from silica to fiber to microelectromechanical (MEM) systems * Design examples relevant to filters for WDM systems and planar waveguide devices * 250 figures as well as problem sets for use in graduate-level studies