Optical Orthogonal Frequency-Division Multiplexing (O-OFDM) is eminently suitable for mitigating the multi-path and chromatic dispersion in both Visible Light Communications (VLC) and Optical Fiber Communications. We commence our discourse by surveying the conception and historic evolution of O-OFDM designed for both VLC and optical fiber, culminating in the birth of its most flexible design alternative, namely Layered Asymmetrically Clipped Optical OFDM (LACO-OFDM). We demonstrate that it is eminently suitable for intensity-modulation and direct-detection aided optical communication systems and characterize its design flexibility. It is also shown that given its flexibility, it subsumes a wide range of optical OFDM schemes conceived over the past two decades or so. The LACO-OFDM transmitter and receiver designs strike a compelling compromise between the features of the popular Asymmetrically Clipped Optical OFDM (ACO-OFDM) and Direct-Current-biased Optical OFDM (DCO-OFDM). The pivotal role of forward error correction designs is also surveyed with the objective of striking a coding gain versus complexity trade-off. We conclude by highlighting a suite of promising techniques capable of further improving the system performance, but require further research. The take-away message of the paper crystallized in the associated design guidelines.

中文翻译：

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光 OFDM 的演进

光正交频分复用 (O-OFDM) 非常适合减轻可见光通信 (VLC) 和光纤通信中的多径色散和色散。我们通过调查为 VLC 和光纤设计的 O-OFDM 的概念和历史演变开始我们的讨论，最终诞生了其最灵活的设计替代方案，即分层非对称裁剪光 OFDM (LACO-OFDM)。我们证明它非常适合强度调制和直接检测辅助光通信系统，并表征其设计灵活性。还表明，鉴于其灵活性，它包含了过去二十年左右构思的各种光学 OFDM 方案。LACO-OFDM 发射器和接收器设计在流行的非对称限幅光 OFDM (ACO-OFDM) 和直流偏置光 OFDM (DCO-OFDM) 的特性之间取得了引人注目的折衷。还研究了前向纠错设计的关键作用，目的是在编码增益与复杂性之间进行权衡。最后，我们重点介绍了一套能够进一步提高系统性能但需要进一步研究的有前途的技术。论文的外卖信息在相关的设计指南中具体化。最后，我们重点介绍了一套能够进一步提高系统性能但需要进一步研究的有前途的技术。论文的外卖信息在相关的设计指南中具体化。最后，我们重点介绍了一套能够进一步提高系统性能但需要进一步研究的有前途的技术。论文的外卖信息在相关的设计指南中具体化。