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OFDM for Optical Communications by Ivan Djordjevic, William Shieh

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Chapter 2 OFDM Principles

2.1 Introduction

Orthogonal frequency-division multiplexing (OFDM) belongs to a broader class of multicarrier modulation (MCM) in which the data information is carried over many lower rate subcarriers. Two of the fundamental advantages of OFDM are its robustness against channel dispersion and its ease of phase and channel estimation in a time-varying environment. With the advancement of powerful silicon DSP technology, OFDM has triumphed in a broad range of applications in the RF domain from digital audio/video broadcasting (DAB/DVB) to wireless local area networks (LANs). However, OFDM also has intrinsic disadvantages, such as high peak-to-average power ratio (PAPR) and sensitivity to frequency and phase noise. Therefore, ...

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