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

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