Chapter 10 OFDM in Free-Space Optical Communication Systems

10.1 Introduction

High bandwidth demands in metropolitan area networks (MANs) and requirements for flexible and cost-effective service cause the imbalance known as the “last mile bottleneck.” Fiber optics, RF, and copper/coaxial lines are the main state-of-the-art technologies used to address the high bandwidth requirements. The incompatibility of RF/microwave and optical communication technologies due to a large bandwidth mismatch between RF and optical channels is now widely believed to be the limiting factor in efforts to further increase transport capabilities. For this reason, RF/microwave–optical interface solutions that will enable aggregating multiple RF/microwave channels ...

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