Regarding a Pre-Distorted ADO-OFDM System as a DCO-OFDM System for Visible Light Communications

被引：2

作者：

Lee, Shih-Kai ^{[1
]}

Chen, Ting-Yao ^{[2
]}

Lee, Chien-Cheng ^{[1
]}

机构：

[1] Yuan Ze Univ, Dept Elect & Elect Engn, Taoyuan 32003, Taiwan

[2] Wistron Corp, Digital Project Dept, Hsinchu 30076, Taiwan

来源：

IEEE ACCESS | 2021年 / 9卷

关键词：

OFDM; Optical transmitters; Time-domain analysis; Visible light communication; Optical receivers; Encoding; Bit error rate; Adaptive modulation; channel side information; DCO-OFDM; polar coding; pre-distorted ADO-OFDM;

D O I：

10.1109/ACCESS.2021.3128185

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

We provide an interpretation for a recently proposed pre-distorted asymmetrically clipped DC-biased optical orthogonal frequency division multiplexing (ADO-OFDM) system. Through our derivation, we find that the predistorted ADO-OFDM system can be regarded as a direct current biased optical OFDM (DCO-OFDM) system in which the odd-index and the even-index subcarriers are based on different power assignments. For multipath channels that have no channel side information (CSI), the mechanism for power allocation and adaptive modulation is impractical. Using state-of-the-art polar coding that includes an interleaver is appropriate to combat such a situation. The performance comparison between an interleaved polar coded ADO-OFDM system both with and without pre-distortion are simulated and concluded.

引用

页码：154651 / 154658

页数：8

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