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
收藏
页码：154651 / 154658
页数：8
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