Impact of Dynamic LED Non-Linearity on DCO-OFDM Optical Wireless Communication

被引：5
|
作者：
Linnartz, Jean-Paul M. G. [1 ,2 ]
Deng, Xiong [1 ]
Van Voorthuisen, Paul [2 ]
机构：
[1] Eindhoven Univ Technol TU E, Dept Elect Engn, NL-5600 MB Eindhoven, Netherlands
[2] Signify Philips Lighting Res, NL-5656 AE Eindhoven, Netherlands
来源：
IEEE COMMUNICATIONS LETTERS | 2021年 / 25卷 / 10期
基金：
欧盟地平线“2020”;
关键词：
OFDM; Light emitting diodes; Nonlinear distortion; Bandwidth; Wireless communication; Photonics; Optical distortion; Optical wireless communication (OWC); nonlinear channels; MODULATION;
D O I：
10.1109/LCOMM.2021.3102744
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
DC-Offset Orthogonal Frequency Division Multiplexing (DCO-OFDM) is a popular modulation method for Optical Wireless Communication (OWC) as it can assign specific power levels and constellations to different subcarrier frequencies across the low-pass response of the LED. However, LEDs exhibit dynamic non-linearities to which OFDM is very sensitive. As LED signals are subject to non-linear memory effects in photon generation, different OFDM subcarriers experience different amounts of distortion. This letter translates the LED behavior into a communication channel model for OFDM modulation. It gives an experimentally verified expression for the Signal-to-Distortion Ratio (SDR) as it varies per subcarrier in OFDM systems.
引用
收藏
页码：3335 / 3339
页数：5
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