广东工业大学学报 ›› 2017, Vol. 34 ›› Issue (01): 71-77.doi: 10.12052/gdutxb.160053

• 综合研究 • 上一篇    下一篇

新型LED阵列分布的室内可见光通信系统模型研究

曾碧, 洪国南   

  1. 广东工业大学 计算机学院, 广东 广州 510006
  • 收稿日期:2016-03-24 出版日期:2017-01-09 发布日期:2017-01-09
  • 通信作者: 洪国南(1990-),男,硕士研究生,主要研究方向为智能算法与可见光通信.E-mail:jason.hong@mail.com E-mail:jason.hong@mail.com
  • 作者简介:曾碧(1963-),女,教授,博士,CCF高级会员(E20-0007403S),主要研究方向为嵌入式系统与智能技术、信息物理融合系统.
  • 基金资助:

    国家基金广东省联合基金重点资助项目（U1201251）；广东省产学研合作专项项目（2014B090904080）

Research on Model of Indoor Visible Light Communication System with Novel LED Arrangement Pattern

Zeng Bi, Hong Guo-nan   

  1. School of Computer Science, Guangdong University of Technology, Guangzhou 510006, China
  • Received:2016-03-24 Online:2017-01-09 Published:2017-01-09

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摘要：

对室内可见光通信系统（VLC）常用的单光源信道模型作出改进，提出一个环绕圆－角阵列的新型LED分布方案，使多用户在不同位置的信噪比差异降低90%，并构建具有反射链路的信道模型.提出采用RMS时延扩展方法分析新方案的多径延迟，利用迫零信道均衡（ZFE）降低码间串扰（ISI）程度.研究表明，新方案使SNR的位置分布更均匀，在考虑反射链路模型中，经信道均衡后达到接近无ISI的理想误码率（BER）性能.该分布方案及其复杂信道模型能满足多用户VLC需求，具有实际应用价值.

关键词: 可见光通信系统, 信道模型, 码间串扰, 误码率, 信道均衡

Abstract:

By analyzing the indoor Visible Light Communication system commonly used LEDs illumination radiation, this paper investigates a circle-corners compensated distribution scheme of the LEDs. Our studies show that the the SNR fluctuation under such an arrangement can reduced 90% which guarantees that users can obtain almost identical communication quality within better entire light intensity distribution. We use Root-Mean-Square delay spread to simulate the multipath delay which has reflections, then we investigate a more realistic channel model using Zero Forcing Equalization. Although the distribution scheme increasing the inter-symbol interference(ISI), the bit error rate(BER) is also very close to that channel without any ISI in the system. The scheme and the channel model reflect the actual needs of multi-user in VLC which has broad prospects for application.

Key words: visible light communication system, channel model, inter symbol interference, bit error rate, channel equalization

中图分类号: 

  • TN929.1

[1] CHOW C W, YEH C H. Visible light communication[M]. Netherlands:Springer Netherlands, 2015:107-121.
[2] WU F M, LIN C T, WEI C C, et al. 1.1-Gb/s White-LED-Based Visible Light Communication Employing Carrier-Less Amplitude and Phase Modulation[J]. IEEE Photonics Technology Letters, 2012, 24(19):1730-1732.
[3] 周镇, 苏成悦, 张春华, 等. 基于LED照明系统的反射器设计[J]. 广东工业大学学报, 2011, 28(4):26-29. ZHOU Z, SU C Y, ZHANG C H, et al. The design of a kind of reflectors based on LED lighting system[J]. Journal of Guangdong University of Technology, 2011, 28(4):26-29.
[4] 傅倩, 陈长缨, 洪岳, 等. 改善室内可见光通信系统性能的关键技术[J]. 自动化与信息工程, 2010, 31(2):4-7. FU Q, CHEN C Y, HONG Y, et al. Key technologies of improving system performance of indoor visible light communication[J]. Automation & Information Engineering, 2010, 31(2):4-7.
[5] RAJBHANDARI S, CHUN H, FAULKNER G, et al. High-speed integrated visible light communication system:device constraints and design considerations[J]. IEEE Journal on Selected Areas in Communications, 2015, 33:1-1.
[6] TSONEV D, CHUN H, RAJBHANDARI S, et al. A 3-Gb/s single-LED OFDM-based wireless VLC link using a gallium nitride[J]. IEEE Photonics Technology Letters, 2014, 26(PP):637-640.
[7] BAO X, YU G, DAI J, et al. Li-Fi:Light fidelity-a survey[J]. Wireless Networks, 2015, 21(6):1879-1889.
[8] Zhang R Q, LI J F, HUANG Z T, et al. Adaptive frequency domain pre-equalization for white-LED nonlinearity in OFDM-based visible light communication systems[J]. Chinese Optics Letters, 2015, 13(7):072302-72305.
[9] WU X, WAN S S, HASKINS M, et al. A high-performance blue filter for a white-led-based visible light communication system[J]. Wireless Communications IEEE, 2015, 22(2):61-67.
[10] 杨家旺, 曹阳, 刘世涛. 基于自适应OFDM的室内可见光通信系统性能研究[J]. 光通信技术, 2015, 39(4):50-52. YANG J W, CAO Y, LIU S T. Performance research of indoor visible light communication system based on adaptive OFDM technology[J]. Optical Communication Technology, 2015, 39(4):50-52.
[11] MOSTAFA A, LAMPE L. Physical-layer security for MISO visible light communication channels[J]. IEEE Journal on Selected Areas in Communications, 2015, 33(9):1806-1818.
[12] MONDAL R K, SAHA N, JANG Y M. Performance enhancement of MIMO based visible light communication[C]//IEEE. International Conference on Electrical Information and Communication Technology.[S.l.:s.n.], 2014:1-5.
[13] AZHAR A H, TRAN T, O'BRIEN D. A Gigabit/s indoor wireless transmission using MIMO-OFDM visible-light communications[J]. IEEE Photonics Technology Letters, 2013, 25(2):171-174.
[14] 张军龙, 刘立程, 胡瑞. 时变信道下OFDM系统载波频偏估计算法研究[J]. 广东工业大学学报, 2014, 31(1):59-64. ZHANG J L, LIU L C, HU R. The carrier frequency offset estimation algorithm for the OFDM system over the time varying multipath channel[J]. Journal of Guangdong University of Technology, 2014, 31(1):59-64.
[15] 罗晓霞, 刘华, 卢振武, 等. 实现LED准直照明的优化设计[J]. 光子学报, 2011, 40(9):1351-1355. LUO X X, LIU H, LU Z W, et al. Automated optimization of free-form surface lens for LED collimation[J]. Acta Photonica Sinica, 2011, 40(9):1351-1355.
[16] DOUSEKI T. A batteryless optical-wireless system with white-LED illumination[C]//IEEE. Personal, Indoor and Mobile Radio Communications, 2004.[S.l.]:15th IEEE International Symposium. 2004, 4:2529-2533.
[17] 汪井源, 徐智勇, 朱勇, 等. 室内可见光通信中噪声与干扰的实验与仿真分析[J]. 光电子·激光, 2012(7):1314-1318. WANG J Y, XU Z Y, ZHU Y, et al. Experiment and simulation analysis of noise and interference in indoor visible light communications[J]. Journal of Optoelectronics·Laser, 2012(7):1314-1318.
[18] 张建昆, 刘博, 杨宇, 等. 一种室内可见光通信亮度控制方法[J]. 光电子·激光, 2011(7):1013-1017. ZHANG J K, LIU B, YANG Y, et al. A brightness control method for indoor visible light communications[J]. Journal of Optoelectronics·Laser, 2011(7):1013-1017.
[19] DING J, WANG K, XU Z. Impact of different LED-spacing in arrayed LED transmitter on VLC channel modeling[C]//WCSP. International Conference on Wireless Communications & Signal Processing.[S.l.:s.n.], 2014:1-6.
[20] 张妥, 梁忠诚, 刘学明, 等. 基于MIMO的可见光通信中的信道均衡[J]. 光通信技术, 2015, 39(6):57-59. ZHANG T, LIANG Z C, LIU X M, et al. Channel equalization in the visible light communication based on MIMO[J]. Optical Communication Technology, 2015, 39(6):57-59.
[1] 崔 苗1,2 , 曹英烈1,2 . 战术移动Ad Hoc网络的自适应MIMO-OFDM系统实现与性能分析[J]. 广东工业大学学报, 2010, 27(3): 41-45.
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