一种抗可见光蜂窝网小区间干扰的光学发射天线设计

doi:10.12263/DZXB.20210111

电子学报 ›› 2021, Vol. 49 ›› Issue (10): 1975-1981.DOI: 10.12263/DZXB.20210111

所属专题：无线光通信及其组网技术

• 无线光通信及其组网技术 • 上一篇下一篇

一种抗可见光蜂窝网小区间干扰的光学发射天线设计

金建力¹, 路慧敏¹, 陈丹阳¹, 况荡², 于彤军³, 王建萍¹

^1.北京科技大学计算机与通信工程学院，北京 100083
^2.中国移动通信集团江西有限公司，江西南昌 330000
^3.北京大学物理学院，人工微结构物理和介观物理国家重点实验室，北京 100081

收稿日期:2021-01-15 修回日期:2021-04-26 出版日期:2021-11-30
- 作者简介:
- 金建力男，1992年生，河北衡水人.北京科技大学博士生，主要研究方向为面向可见光通信、6G关键技术. E-mail: b20180309@xs.ustb.edu.cn
  路慧敏（通信作者）女，1978年生，辽宁新民人.博士，北京科技大学副教授，主要研究方向为可见光通信、光学器件设计. E-mail: hmlu@ustb.edu.cn
- 基金资助:
- 国家自然科学基金 (61671055)

Design of Anti-Cell Interference Optical Transmitting Antenna for Visible Light Cellular Network

JIN Jian-li¹, LU Hui-min¹, CHEN Dan-yang¹, KUANG Dang², YU Tong-jun³, WANG Jian-ping¹

^1.School of Computer and Communication Engineering, University of Science and Technology Beijing, Beijing 100083, China
^2.China Mobile Group Jiangxi Company Limited, Nanchang, Jiangxi 330000, China
^3.The State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing 100081, China

Received:2021-01-15 Revised:2021-04-26 Online:2021-11-30 Published:2021-10-25
- Supported by:
- National Natural Science Foundation of China (61671055)

摘要/Abstract

摘要：

本文提出了一种应用于可见光蜂窝网的自由曲面光学发射天线，用于改善整个网络范围内的信号质量以提高系统的通信性能.首先基于能量映射关系和斯涅尔定律，设计了目标光分布区域为矩形的基于自由曲面透镜的光学发射天线，应用该天线能使半导体发光二极管（LED）光源发出的光信号均匀分布在0.8 m × 0.8 m的正方形范围内.而后将设计的光学发射天线应用于可见光蜂窝网，并进一步对网络接收区域的光信号质量和系统性能做了分析.结果表明，在一个3 m × 3 m × 3 m房间中安装有16个LED光源作为接入点，采用所设计的自由曲面光学发射天线，网络覆盖区域的光信号分布均匀度达到了0.8以上，同信道干扰基本消除，平均信干噪比为12.6 dB，系统具有较好的误码率性能，能够有效地保证可见光蜂窝网的通信质量.

关键词: 透镜, 可见光蜂窝网, 自由曲面透镜, 可见光通信

Abstract:

A novel optical transmitting antenna based on free-form lens is proposed for visible light cellular network in order to improve the signal quality in the whole coverage area and communication performance of the system. Based on the energy mapping relation and Snell’s law, the optical transmitting antenna based on free-form lens is designed to realize rectangle light receiving areas. Using this optical transmitting antenna, the light signal from light emitting diodes (LED) source can be distributed uniformly in a square area of 0.8 m × 0.8 m. On this basis, a visible light cellular network with the novel optical transmitting antenna is applied, of which the quality of the receiving light signal and system performance are further investigated. It is demonstrated that in a 3 m × 3 m × 3 m room with 16 LEDs using the designed optical antenna, the uniformity of light distribution in the light network converage reaches 0.8. With the elimination of co-channel interference, the average signal to interference and noise ratio (SINR) is 12.6 dB, which can effectively improve the bit error ratio (BER) and ensure the communication performance of visible light cellular networks.

Key words: optical transmitting antenna, visible light cellular network, free-form lens, visible light communications

中图分类号:

TN929.1

金建力, 路慧敏, 陈丹阳, 况荡, 于彤军, 王建萍. 一种抗可见光蜂窝网小区间干扰的光学发射天线设计[J]. 电子学报, 2021, 49(10): 1975-1981.

JIN Jian-li, LU Hui-min, CHEN Dan-yang, KUANG Dang, YU Tong-jun, WANG Jian-ping. Design of Anti-Cell Interference Optical Transmitting Antenna for Visible Light Cellular Network[J]. Acta Electronica Sinica, 2021, 49(10): 1975-1981.

图/表 8

图1 （a）光能量和（b）目标接收区域的能量映射关系示意图

图2 光学发射天线的结构（a）轮廓线（b）三维模型

图3 基于新型光学发射天线的可见光蜂窝网模型

表1 实验仿真参数

参数	名称	取值
P_r	光接收功率/dBm	3.0
L	LED中心波长/μm	0.546 1
Φ_1/2	LED半功率角/°	70
A	光电接收器面积/cm²	1
B	噪声带宽/MHz	100
q	电子电荷量/C	1.602 189×10^-19
R	光电探测器灵敏度/（A/W）	0.53
C_bl	背景光电流噪声/（A²/MHz）	9.184×10^-22
C_fr	反馈电阻噪声/（A²/MHz²）	6.508 6×10^-35
C_ch	FET信道噪声参数/（A²/MHz³）	2.33×10^-30

图4 基于自由曲面光发射天线的单个LED辐射光分布图

图5 可见光蜂窝网的光信号分布情况：（a）无光学发射天线；（b）基于自由曲面光发射天线

图6 可见光蜂窝网的信干噪比分布情况：（a）无光学发射天线；（b）基于自由曲面光发射天线

图7 基于自由曲面光学发射天线的可见光蜂窝网的误码率分布

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一种抗可见光蜂窝网小区间干扰的光学发射天线设计

Design of Anti-Cell Interference Optical Transmitting Antenna for Visible Light Cellular Network

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