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Recent progress in ICT has exceeded our expectations for meeting the requirement of multimedia society in the 21st century. The FSOC is considered to be one of the key technologies for realizing very high speed multi GbPs large-capacity terrestrial and aerospace communications. In FSOC, the optical beam propagation in the turbulent atmosphere is severely affected by various factors suspended in the channel. Wavefront aberration correcting with continuous beam alignment are the key requirements for a successful installation of an FSOC system which are the main contributions in our book. Establishment of FSOC setups, development of accurate weather station, measurement of atmospheric attenuation (Att) and turbulence strength (Cn2), development of new models to predict the Att and Cn2, design of Response Surface Model and Artificial Neural Network based on controller, implementation of neural-controller in FPGA and attaining the BER of 6.4x10^-9 during different outdoor environments. All the original contributions, newness, findings and experimental results etc., are reported in the book. Subject of work; Wireless Optical Communication. The content of the book can be referred by various application designers and/or academicians for working on FSOC transceiver design, laser cutting, laser metrology, laser surgery, beam focusing & pointing, beacon positioning and coupling etc. Further, all necessary MATLAB and VHDL codes are also given on appropriate pages for the readers´ quick/ clear understanding.

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Chapter One - Introduction. Chapter Two - Real-Time Measurement of Meteorological Parameters for Estimating Low-Altitude Atmospheric Turbulence Strength (Cn2). Chapter Three - Modeling and Numerical Evaluation of Ground-Level Atmospheric Attenuation and Refractive Index Structure Function (Cn2) using measured Local Meteorological Data for FSO Applications. Chapter Four - Mitigation of Beam Wandering due to Atmospheric Turbulence and Prediction of Control Quality using Intelligent Decision Making Tools. Chapter Five - A Direct and Neural Controller Performance Study with Beam Wandering Mitigation Control in Free Space Optical Link. Chapter Six - Quality Metrics and Reliability Analysis of Ground-to-Ground Free Space Laser Communication in Different Weather Changes together with Beam Steering System. Chapter Seven - Future Work.

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A. Arockia Bazil Raj, Kings College of Engineering, Thanjavur, India.

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