非线性编码叠加调制的两发一收可见光通信系统研究

doi:10.11959/j.issn.2096-3750.2022.00275

物联网学报 ›› 2022, Vol. 6 ›› Issue (3): 14-22.doi: 10.11959/j.issn.2096-3750.2022.00275

• 专题：物联网与无线光通信 • 上一篇下一篇

非线性编码叠加调制的两发一收可见光通信系统研究

徐增熠¹^,²^,³, 牛文清¹^,²^,³, 陈慧⁴, 贺志学⁴, 迟楠¹^,²^,³

¹ 复旦大学电磁波信息科学教育部重点实验室，上海 200433
² 上海低轨卫星通信与应用工程技术研究中心，上海 200433
³ 上海低轨卫星通信技术协同创新中心，上海 200433
⁴ 鹏城实验室，广东深圳 518055

修回日期:2022-06-15 出版日期:2022-08-05 发布日期:2022-08-08
作者简介:徐增熠（1999- ），男，复旦大学博士生，主要研究方向为MIMO可见光通信系统、可见光通信器件和基于机器学习的可见光通信信号处理
牛文清（1997- ），女，复旦大学博士生，主要研究方向为可见光通信系统编码与基于机器学习的可见光通信信号处理
陈慧（1994- ），女，复旦大学博士生，主要研究方向为水下可见光通信系统与基于机器学习的可见光通信信号处理
贺志学（1983- ），男，博士，鹏城实验室高级工程师，主要研究方向为高速长距离光传输系统
迟楠（1974- ），女，博士，复旦大学教授，主要研究方向为先进调制格式、光纤通信系统、可见光通信系统
基金资助:
国家自然科学基金资助项目(61925104);国家自然科学基金资助项目(62031011);国家自然科学基金资助项目(62074072);中国国家博士后创新人才支持计划(BX2021082);中国博士后科学基金资助项目(2021M700025);鹏城实验室重大项目(PCL2021A14)

Exploring the nonlinear coded superposed modulation MISO visible light communication system

Zengyi XU¹^,²^,³, Wenqing NIU¹^,²^,³, Hui CHEN⁴, Zhixue HE⁴, Nan CHI¹^,²^,³

¹ Key Laboratory of EMW Information, Fudan University, Shanghai 200433, China
² Shanghai Engineering Research Center of Low-Earth-Orbit Satellite Communication and Applications, Shanghai 200433, China
³ Shanghai Collaborative Innovation Center of Low-Earth-Orbit Satellite Communication Technology, Shanghai 200433, China
⁴ Peng Cheng Laboratory, Shenzhen 518055, China

Revised:2022-06-15 Online:2022-08-05 Published:2022-08-08
Supported by:
The National Natural Science Foundation of China(61925104);The National Natural Science Foundation of China(62031011);The National Natural Science Foundation of China(62074072);The China National Postdoctoral Program for Innovative Talents(BX2021082);The China Postdoctoral Science Foundation(2021M700025);The Major Key Project of Peng Cheng Laboratory(PCL2021A14)

摘要/Abstract

摘要：

基于发光二极管（LED, light-emitting diode）的可见光多输入单输出（MISO, multi-input single-output）系统信道带宽往往受 LED 器件的非线性和其发光的非相干特性限制。在信号传输中使用预编码可以以较低的成本缓解这一限制，目前的研究多采用相同的编码方式对全部信道进行编码。提出了一种非对称的编码方式，在两发一收的可见光通信系统中的一路使用了非线性编码。该方法以编码信道的误码率为代价，扩展了未编码信道的动态范围。在误码率门限设置为 3.8×10^-3时，这一编码方式使得未编码信道较编码信道的动态范围扩大 30%。若同时使用非对称的前向纠错编码冗余，此种编码方式可以在维持两路信道正常通信的前提下灵活控制信道的动态范围，从而适应信道环境的变化。该研究将有利于室内多光源多输入可见光系统或水下可见光通信系统的研究。

关键词: 可见光通信, 非线性编码, 叠加幅度相位调制, 多输入单输出

Abstract:

The light-emitting diode (LED) based visible light multi-input single-output (MISO) system usually suffers from the nonlinearity in LED and its incoherent nature in emission.Adopting precoding would alleviate this limitation at comparatively lower cost.Existing researches usually apply the same coding scheme to all the channels.An asymmetric coding scheme was proposed, which nonlinearly encodes one of the two channels in a MISO system.This solution enlarges the dynamic range of the uncoded channel at the cost of a higher bit error ratio (BER) in the coded one.When the BER threshold is set at 3.8×10^-3, the uncoded channel gains a dynamic range 30% larger than that of the coded one.If this solution is combined with flexible forward error correction redundancy, it would allow the system to adapt to varying channel condition while still maintaining the communication in both channels.This research would be beneficial in the study on indoor or underwater visible light communication (VLC) system.

Key words: VLC, nonlinear coding, superposed modulation, MISO

中图分类号:

TN929.1

徐增熠, 牛文清, 陈慧, 贺志学, 迟楠. 非线性编码叠加调制的两发一收可见光通信系统研究[J]. 物联网学报, 2022, 6(3): 14-22.

Zengyi XU, Wenqing NIU, Hui CHEN, Zhixue HE, Nan CHI. Exploring the nonlinear coded superposed modulation MISO visible light communication system[J]. Chinese Journal on Internet of Things, 2022, 6(3): 14-22.

图/表 7

图1

图2

图3

图4

图5

图6

表1

后均衡器反映的码间干扰和信道间干扰"

信道	$W_{0}$	RMS ISI	RMS ICI	$RMS ISI / W_{0}$	$RMS ICI / W_{0}$
编码信道600 mV	1.13	0.037 8	0.140	0.033 5	0.124
未编码信道400 mV	1.09	0.034 0	0.078 2	0.031 2	0.071 9

表1

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非线性编码叠加调制的两发一收可见光通信系统研究

Exploring the nonlinear coded superposed modulation MISO visible light communication system

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