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Radio over Fiber for Wireless Communications: From Fundamentals to Advanced Topics

Book Description

A comprehensive evaluation of Fi-Wi, enabling readers to design links using channel estimation and equalization algorithms

This book provides a detailed study of radio over fiber (ROF) based wireless communication systems, otherwise called fiber wireless (Fi-Wi) systems. This is an emerging hot topic where the abundant bandwidth of optical fiber is directly combined with the flexibility and mobility of wireless networks to provide broadband connectivity. Its application is increasing because of the growing demand for broadband wireless services. In such a system the transmission of the radio signals over a fiber is an important task. This book provides substantial material on the radio over fiber part of the complete fiber-wireless system, including new research results on the compensation methods.

The early chapters provide fundamental knowledge required for a non-expert engineering professional as well as senior/graduate level students to learn this topic from scratch. The latter part of the book covers advanced topics useful for researchers and senior students. Therefore, this book provides a comprehensive understanding of the system for readers who will gain enough knowledge to design Fi-Wi links of their own by learning how to develop Fi-Wi channel estimation and equalization algorithms. This concept is completely novel in current literature and has been patented by the author.

Readers are expected to have a basic understanding of fiber optics and wireless communications to easily follow the book and to appreciate the concepts. Basics of the Fi-Wi system and signal processing approaches are clearly explained. It covers a multidisciplinary topic and acts as a bridge between optical and wireless communication domains. In the increasingly demanding telecommunications profession, engineers are expected to have knowledge in both optical and wireless communications and expected design combined/hybrid systems. Hence, the book is written in such a way that both optical and wireless professionals will be able to easily understand and perceive the concepts.

  • follows a logical process from basic principles through to advanced topics, providing a wide range of interest for researchers, practicing engineers, students, and those required to build such networks

  • explains detailed system design concepts and the limitations and advantages in each configuration, appealing to design engineers, and largely avoiding system specifics

  • demonstrates the author's exclusive patent, showing how to develop baseband signal processing algorithms for Fi-Wi systems, which is a key requirement for the successful deployment of Fi-Wi systems

  • contains tables, numerical examples and case studies, facilitating a good quantitative understanding of the topic

  • Table of Contents

    1. Title Page
    2. Copyright
    3. About the Author
    4. Foreword
    5. Preface
      1. Topics Covered in the Book
      2. About the Book Itself
    6. Acknowledgements
    7. Chapter 1: Introduction
      1. 1.1 Motivation
      2. 1.2 Basic Fi-Wi System Architecture
      3. 1.3 Major Issues
      4. 1.4 Other Fiber-Feeder Approaches
      5. 1.5 Book Outline
    8. Chapter 2: Important Fi-Wi Link Elements
      1. 2.1 RF-Optical Modulation
      2. 2.2 The Fiber Channel
      3. 2.3 Optical Receiver
      4. 2.4 Brief Review of Baseband-RF Modulation Techniques
      5. 2.5 The Wireless Channel
    9. Chapter 3: Power Link Budget and Cumulating SNR
      1. 3.1 Introduction
      2. 3.2 System Description
      3. 3.3 Optical SNR
      4. 3.4 Cumulative SNR
      5. 3.5 RAP Design Considerations
      6. 3.6 Summary
    10. Chapter 4: An Improved Expression for Relative Intensity Noise
      1. 4.1 The Basics
      2. 4.2 The Fundamental Noise Processes in ROF Links
      3. 4.3 The Signal-to-Noise Ratio
      4. 4.4 Numerical Evaluation and Discussion
      5. 4.5 Summary
    11. Chapter 5: Subcarrier-Multiplexed ROF Downlink
      1. 5.1 Introduction
      2. 5.2 The ROF Downlink Channel
      3. 5.3 The Wireless Downlink Channel
      4. 5.4 Numerical Evaluation and Discussion
    12. Chapter 6: Subcarrier-Multiplexed ROF Uplink
      1. 6.1 The Wireless Uplink Channel
      2. 6.2 The ROF Uplink Channel
      3. 6.3 Signals to Distortion, Interference, and Noise Ratios
      4. 6.4 Numerical Evaluations and Discussion
      5. 6.5 Summary
    13. Chapter 7: Externally Modulated ROF Links
      1. 7.1 Mach–Zehnder Modulator
      2. 7.2 Electro-Absorption Modulator
      3. 7.3 Reflective Semiconductor Optical Amplifier
      4. 7.4 Optimization of the MZI Bias Voltage
      5. 7.5 Subcarrier-Multiplexed Signals in MZI
    14. Chapter 8: DSP Modeling of the ROF Link Nonlinearity
      1. 8.1 Introduction
      2. 8.2 Various Attempts to Reduce NLD
      3. 8.3 DSP Approaches
      4. 8.4 Basics of DSP for Nonlinear Systems
      5. 8.5 Baseband Representation of a Passband Complex Nonlinear System
      6. 8.6 Nonlinear Modeling of Fi-Wi Link
    15. Chapter 9: Adaptive Compensation for the ROF Link Nonlinearity
      1. 9.1 Adaptive Modeling of the ROF Link
      2. 9.2 Asymmetric Compensation
      3. 9.3 Summary
    16. Chapter 10: Joint Estimation of the Fi-Wi Channel
      1. 10.1 The Wiener and Hammerstein System Model for Fi-Wi Links
      2. 10.2 Fi-Wi Channel Estimation
      3. 10.3 Case Study
      4. 10.4 Summary
    17. Chapter 11: Joint Equalization for the Fi-Wi Channel
      1. 11.1 Equalization of the Wireless Channel
      2. 11.2 Optimization of Polynomial Filter Parameters
      3. 11.3 Optimization of Linear Filter Parameters
      4. 11.4 Summary
    18. Chapter 12: Performance Evaluation of the Hammerstein-Type DFE
      1. 12.1 Evaluation of the Polynomial Filter
      2. 12.2 Evaluation of Linear Filters
      3. 12.3 Case Study
      4. 12.4 Summary
    19. Chapter 13: Multiuser CDMA Fi-Wi Systems
      1. 13.1 Multiuser Fi-Wi Uplink Model
      2. 13.2 Correlation Relationships
      3. 13.3 ROF Channel Estimation
      4. 13.4 Case Study
      5. 13.5 Fi-Wi Uplink Equalization
      6. 13.6 Equalization: Simulation Results and Discussion
      7. 13.7 Summary
    20. Chapter 14: Fi-Wi for 4G, 5G, and OFDM Wireless Networks
      1. 14.1 Brief History of Cellular Communication Systems
      2. 14.2 Wireless Access Schemes
      3. 14.3 Peak-to-Average Power Ratio Reduction Techniques
      4. 14.4 OFDM ROF System Improvement
      5. 14.5 Combinations of OFDMA and CDMA
      6. 14.6 Summary
    21. List of Abbreviations
    22. Important Symbols
    23. References
    24. Index
    25. End User License Agreement