Optical Wireless Communications: System and Channel Modelling with MATLAB

Incorporating MATLAB® throughout, the authors highlight past and current research activities to illustrate optical sources, transmitters, detectors, receivers, and other devices used in optical wireless communications. They also discuss both indoor and outdoor environments, discussing how different factors—including various channel models—affect system performance and mitigation techniques.
One entire chapter explores the emerging field of visible light communications, and others describe techniques for using theoretical analysis and simulation to mitigate channel impact on system performance. Additional topics include wavelet denoising, artificial neural networks, and spatial diversity. Content also covers different challenges encountered in OWC, as well as outlining possible solutions and current research trends. A major attraction of the book is the presentation of MATLAB simulations and codes, which enable readers to execute extensive simulations and better understand OWC in general.

Introduction: Optical Wireless Communication Systems

Wireless Access Schemes

A Brief History of OWC

OWC/Radio Comparison

Link Configuration

OWC Application Areas

Safety and Regulations

OWC Challenges

Optical Sources and Detectors

Light Sources

Light-Emitting Diode

The Laser

Photodetectors

Photodetection Techniques

Photodetection Noise

Optical Detection Statistics

Channel Modelling

Indoor Optical Wireless Communication Channel

Artificial Light Interference

Outdoor Channel

Modulation Techniques

Introduction

Analogue Intensity Modulation

Digital Baseband Modulation Techniques

Pulse Position Modulation

Pulse Interval Modulation

Dual-Header PIM

Multi-Level DPIM

Comparisons of Baseband Modulation Schemes

Subcarrier Intensity Modulation

Orthogonal Frequency Division Multiplexing

Optical Polarization Shift Keying

Appendices

System Performance Analysis: Indoor

Effect of Ambient Light Sources on Indoor OWC Link Performance

Effect of FLI without Electrical High-Pass Filtering

Effect of Baseline Wander without FLI

Effect of FLI with Electrical High-Pass Filtering

Wavelet Analysis

Link Performance for Multi-path Propagation

Mitigation Techniques

Equalization as a Classification Problem

Introduction to Artificial Neural Network

Training Network

The ANN-Based Adaptive Equalizer

FSO Link Performance under the Effect of Atmospheric Turbulence

On–Off Keying

Pulse Position Modulation

Subcarrier Intensity Modulation

Atmospheric Turbulence-Induced Penalty

Appendices

Outdoor OWC Links with Diversity Techniques

Atmospheric Turbulence Mitigation Techniques

Receiver Diversity in Log-Normal Atmospheric Channels

Transmitter Diversity in a Log-Normal Atmospheric Channel

Transmitter–Receiver Diversity in a Log-Normal Atmospheric Channel

Results and Discussions of SIM-FSO with Spatial Diversity in a Log-Normal Atmospheric Channel

SIM-FSO with Receiver Diversity in Gamma–Gamma and Negative Exponential Atmospheric Channels

Terrestrial Free Space Optical Links with Subcarrier Time Diversity

Aperture Averaging

Appendices

Visible Light Communications

Introduction

System Description

System Implementations

Multiple-Input-Multiple-Output VLC

Home Access Network

References