Wireless.Optical.Communication.Systems.Springer.Verlag.Telos.Sep.2004.pdf

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Part I Introduction
1. INTRODUCTION
1.1
1.2
A Brief History of Wireless Optical Communications
Overview
2. WIRELESS OPTICAL INTENSITY CHANNELS
2.1
2.2
2.3
2.4
2.5
Wireless Optical Intensity Channels
Optoelectronic Components
Noise
Channel Topologies
Summary
3
5
7
9
10
16
27
31
35
3. AN INTRODUCTION TO OPTICAL INTENSITY SIGNALLING
3.1
3.2
3.3
3.4
Communication System Model
Bandwidth
Example Modulation
The Communication System Design Problem
39
39
47
51
64
v
xi
viii WIRELESS OPTICAL COMMUNICATION SYSTEMS
Part II Signalling Design
4. OPTICAL INTENSITY SIGNAL SPACE MODEL
4.1
4.2
4.3
Signal Space of Optical Intensity Signals
Examples
Conclusions
5. LATTICE CODES
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
Definition of Lattice Codes
Constellation Figure of Merit‚ Gain
Baseline Constellation
Spectral Considerations
Gain versus a Baseline Constellation
Continuous Approximation to Optical Power Gain
Coding Gain
Shaping Gain
Shaping Gain: Expression
5.10
5.11
5.12
5.13
Shaping Gain: Peak-Symmetric Schemes
Opportunistic Secondary Channels
Example Lattice Codes
Conclusions
5.A Continuous Approximation of the Power Spectral Density
6. CHANNEL CAPACITY
6.1
6.2
6.3
6.4
6.5
6.6
6.7
Background
Problem Definition
BandwidthConstraint
Upper bound on Channel Capacity
Lower bound on Channel Capacity
Examples and Discussion
Conclusions
69
69
77
81
83
84
86
88
88
90
90
91
92
93
94
95
95
102
104
107
107
109
110
111
115
117
124
Contents ix
Part III Multi-Element Techniques
7. THE MULTIPLE-INPUT / MULTIPLE-OUTPUT
WIRELESS OPTICAL CHANNEL
7.1
7.2
7.3
7.4
7.5
7.6
Previous Work
The MIMO Wireless Optical Channel
Design Challenges
Pixel-Matched System
The Pixelated Wireless Optical Channel
Conclusions
127
128
130
136
138
140
146
8. PROTOTYPE MIMO OPTICAL CHANNEL:
MODELLING & SPATIO-TEMPORAL CODING
8.1
8.2
8.3
8.4
8.5
Experimental Prototype
Channel Model
Pixel-Matched Systems
Pixelated Wireless Optical Channel
Conclusions
149
149
153
164
165
174
9. CONCLUSIONS AND FUTURE DIRECTIONS
9.1
9.2
Conclusions
Future Work

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