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Optical wireless communications is a dynamic area of research and development. Combining fundamental theory with a broad overview, this book is an ideal reference for anyone working in the field, as well as a valuable guide for self-study. It begins by describing important issues in optical wireless theory, including coding and modulation techniques for optical wireless, wireless optical CDMA communication systems, equalization and Markov chains in cloud channels and optical MIMO systems, as well as explaining key issues in information theory for optical wireless channels. The next section describes unique channels that could be found in optical wireless applications, such as NLOS UV atmospheric scattering channels, underwater communication links and a combination of hybrid RF/optical wireless systems. The final section describes applications of optical wireless technology, such as quantum encryption, visible light communication, IR links and sensor networks, with step-by-step guidelines to help reduce design time and cost. Table of Contents Part I. Outlook 1. Introduction Part II. Optical Wireless Communication Theory 2. Coded modulation techniques for optical wireless channels 3. Wireless optical CDMA communication systems 4. Pointing error statistics 5. Equalization and Markov chains in cloud channel 6. Multiple-Input/Multiple-Output techniques for indoor optical wireless communications 7. Channel capacity Part III. Unique Channels 8. Modeling and characterization of ultraviolet scattering communication channels 9. Free space optical communications underwater 10. The optical wireless channel 11. Hybrid RF/FSO communications Part IV. Applications 12. Quantum key distribution 13. Optical modulating retro-reflectors 14. Visible-light communications 15. Optical wireless in sensor networks.