Spatial dimming scheme for optical OFDM based visible light communication

被引：32
|
作者：
Yang, Yang [1 ]
Zeng, Zhimin [1 ]
Cheng, Julian [2 ]
Guo, Caili [1 ]
机构：
[1] Beijing Univ Posts & Telecommun, Beijing Lab Adv Informat Networks, Beijing 100876, Peoples R China
[2] Univ British Columbia, Kelowna, BC V1V 1V7, Canada
来源：
OPTICS EXPRESS | 2016年 / 24卷 / 26期
基金：
中国国家自然科学基金;
关键词：
PERFORMANCE; SYSTEMS;
D O I：
10.1364/OE.24.030254
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A new dimming control scheme termed spatial dimming orthogonal frequency division multiplexing (SD-OFDM) is proposed for multiple-input and multiple output OFDM based visible light communication. The basic idea of SD-OFDM is that the illumination can be represented by the number of glared light emitting diodes (LEDs) in an LED lamp. As the biasing level of LEDs does not adjust to represent the required illumination level, the proposed scheme can significantly mitigate the clipping noise compared to analogue dimming schemes. Furthermore, unlike digital dimming schemes that control illumination levels by setting different duty cycles of pulse width modulation, the proposed scheme is always in the "on-state" for varied illumination levels. Both analytical and simulation results indicate that the proposed scheme is an efficient and feasible dimmable scheme. (C) 2016 Optical Society of America
引用
收藏
页码：30254 / 30263
页数：10
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