OFDM for Optical Communications
OFDM for Optical Communications
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DOI：
10.1109/jlt.2008.2010061
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发表时间：
2009-01-01
影响因子：
4.7
通讯作者：
Armstrong, Jean
中科院分区：
文献类型：
--
作者：
Armstrong, Jean
正交频分复用（OFDM）是一种调制技术，现在被用于大多数新的和新兴的宽带有线和无线通信系统中，因为它是由色散信道引起的符号间干扰的有效解决方案。最近，许多研究人员已经表明，OFDM也是一种有前途的光通信技术。本文给出了一个教程概述OFDM突出的方面，可能是重要的光学应用。为了在光系统中实现良好的性能，必须以各种方式对OFDM进行调整。讨论了单模光纤、多模光纤和光无线所带来的限制，并概述了已经发展起来的光OFDM的新形式。OFDM的主要缺点是它的高峰平均功率比以及它对相位噪声和频率偏移的敏感性。这些原因的损害进行了描述和讨论的光学系统的影响。
Orthogonal frequency division multiplexing (OFDM) is a modulation technique which is now used in most new and emerging broadband wired and wireless communication systems because it is an effective solution to intersymbol interference caused by a dispersive channel. Very recently a number of researchers have shown that OFDM is also a promising technology for optical communications. This paper gives a tutorial overview of OFDM highlighting the aspects that are likely to be important in optical applications. To achieve good performance in optical systems OFDM must be adapted in various ways. The constraints imposed by single mode optical fiber, multimode optical fiber and optical wireless are discussed and the new forms of optical OFDM which have been developed are outlined. The main drawbacks or OFDM are its high peak to average power ratio and its sensitivity to phase noise and frequency offset. The impairments that these cause are described and their implications for optical systems discussed.