Details

Wireless Optical Communications


Wireless Optical Communications


1. Aufl.

von: Olivier Bouchet

140,99 €

Verlag: Wiley
Format: EPUB
Veröffentl.: 04.02.2013
ISBN/EAN: 9781118563274
Sprache: englisch
Anzahl Seiten: 320

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Beschreibungen

<p>Wireless optical communication refers to communication based on the unguided propagation of optical waves. The past 30 years have seen significant improvements in this technique – a wireless communication solution for the current millennium – that offers an alternative to radio systems; a technique that could gain attractiveness due to recent concerns regarding the potential effects of radiofrequency waves on human health.<br /> The aim of this book is to look at the free space optics that are already used for the exchange of current information; its many benefits, such as incorporating channel properties, propagation models, link budgets, data processing including coding, modulation, standards and concerns around health and safety (IEC 60825 or FCC - Class 1 for example), etc. will become indispensable over the next decade in addressing computer architectures for short-, medium- and long-range telecommunications as we move from gigabytes to terabytes per second.<br /> Wireless Optical Communications is an excellent tool for any engineer wanting to learn about wireless optical communications or involved in the implementation of real complete systems. Students will find a wide range of information and useful concepts such as those relating to propagation, optics and photometry, as well the necessary information on safety.</p> <p>Contents</p> <p>1. Light.<br /> 2. History of Optical Telecommunications.<br /> 3. The Contemporary and the Everyday Life of Wireless Optical Communication.<br /> 4. Propagation Model.<br /> 5. Propagation in the Atmosphere.<br /> 6. Indoor Optic Link Budget.<br /> 7. Immunity, Safety, Energy and Legislation.<br /> 8. Optics and Optronics.<br /> 9. Data Processing.<br /> 10. Data Transmission.<br /> 11. Installation and System Engineering.<br /> 12. Conclusion.</p>
<p><b>Foreword.xi</b><br /> Pierre-Noël FAVENNEC</p> <p><b>Acronyms xiii</b></p> <p><b>Introduction.xix</b></p> <p><b>Chapter 1. Light 1</b></p> <p><b>Chapter 2. History of Optical Telecommunications 7</b></p> <p>2.1. Some definitions 7</p> <p>2.2. The prehistory of telecommunications 8</p> <p>2.3. The optical aerial telegraph 11</p> <p>2.4. The code 14</p> <p>2.5. The optical telegraph 18</p> <p>2.6. Alexander Graham Bell’s photophone 20</p> <p><b>Chapter 3. The Contemporary and the Everyday Life of Wireless Optical Communication 25</b></p> <p>3.1. Basic principles 25</p> <p>3.2. Wireless optical communication 53</p> <p><b>Chapter 4. Propagation Model 63</b></p> <p>4.1. Introduction.63</p> <p>4.2. Baseband equivalent model 63</p> <p>4.3. Diffuse propagation link budget in a confined environment 73</p> <p><b>Chapter 5. Propagation in the Atmosphere 85</b></p> <p>5.1. Introduction.85</p> <p>5.2. The atmosphere 86</p> <p>5.3. The propagation of light in the atmosphere 87</p> <p>5.4. Models.93</p> <p>5.5. Experimental set-up 103</p> <p>5.6. Experimental results.104</p> <p>5.7. Fog, haze, and mist 107</p> <p>5.8. The runway visual range (RVR) 108</p> <p>5.9. Calculating process of an FSO link availability 114</p> <p>5.10. Conclusion 116</p> <p><b>Chapter 6. Indoor Optic Link Budget.119</b></p> <p>6.1. Emission and reception parameters 119</p> <p>6.2. Link budget for line of sight communication 128</p> <p>6.3. Link budget for communication with retroreflectors.132</p> <p>6.4. Examples of optical budget and signal-to-noise ratio (SNR) 135</p> <p><b>Chapter 7. Immunity, Safety, Energy and Legislation 141</b></p> <p>7.1. Immunity 141</p> <p>7.2. The confidentiality of communication 149</p> <p>7.3. Energy 153</p> <p>7.4. Legislation 154</p> <p><b>Chapter 8. Optics and Optronics 157</b></p> <p>8.1. Overview 157</p> <p>8.2. Optronics: transmitters and receivers.157</p> <p>8.3. Optics 170</p> <p><b>Chapter 9. Data Processing 177</b></p> <p>9.1. Introduction.177</p> <p>9.2. Modulation 178</p> <p>9.3. The coding 184</p> <p><b>Chapter 10. Data Transmission 197</b></p> <p>10.1. Introduction 197</p> <p>10.2. Point-to-point link 201</p> <p>10.3. Point-to-multipoint data link 206</p> <p>10.4. Summary 212</p> <p><b>Chapter 11. Installation and System Engineering 213</b></p> <p>11.1. Free-space optic system engineering and installation 213</p> <p>11.2. Wireless optical system installation engineering in limited space 225</p> <p><b>Chapter 12. Conclusion.237</b></p> <p><b>APPENDICES 241</b></p> <p>Appendix 1. Geometrical Optics, Photometry and Energy Elements 243</p> <p>Appendix 2. The Decibel Unit (dB) 257</p> <p>Bibliography 261</p> <p>List of Figures 273</p> <p>List of Tables 277</p> <p>List of Equations 279</p> <p>Index 283</p>
<b>Olivier Bouchet</b> France Télécom, Orange Labs, Cesson-Sévigné, France

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