杨春勇,吕云龙,侯 金,陈少平.室内可见光MIMO通信码间干扰分析与接收视场角优化[J].中南民族大学学报自然科学版,2017,(2):85-90
室内可见光MIMO通信码间干扰分析与接收视场角优化
Analysis of Inter-Symbol Interference and Optimization of ReceiverField-of-View in Indoor Visible Light MIMO Communication System
  
DOI:
中文关键词: 可见光通信  多输入多输出  视场角  码间干扰
英文关键词: visible light communication  multi-input multi-output  filed of view  intersymbol interference
基金项目:国家自然科学基金资助项目(61002013、11147014);湖北省自然科学基金资助项目(2014CFA051)
作者单位
杨春勇,吕云龙,侯 金,陈少平 中南民族大学 电子信息工程学院智能无线通信湖北省重点实验室武汉 430074 
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中文摘要:
      针对可见光 MIMO 通信过程中多径时延造成的码间干扰对可见光通信系统性能影响问题,采用光线追踪分析方法建立了室内系统模型及码间干扰模型,讨论了多输入多输出的室内通信环境下,不同 LED布局下光学天线视场角大小对系统码间干扰及误码率的影响.研究结果表明: 当数据传输速率为 100M bit/s 时,存在一种 LED 布局使整个接收平面能满足基本通信所要求的10-6误码率阈值.在此结构的基础上分析可知, 随着视场角的逐渐增大,接收平面的盲区会逐渐消失,但系统码间干扰会随之增加. 在接收机视场角为43°时,平均信噪比最大并能达到室内最佳覆盖,此时能有效减小多径效应及码间干扰并提高系统传输性能.
英文摘要:
      Aiming at the influence of the intersymbol interference caused by multipath delay on the performance of visible light communication system in visible light MIMO communication.Ray tracing method is adopted to establish the channel model and intersymbol interference model. The effects of various LED layout and antenna FOV to the system intersymbol interference and bit-error rate has been analyzed in indoor MIMO condition.Results show that there is a LED layout so that the entire receiving plane satisfies the basic communication requirements of 10-6 BER when the transmission rate is 100 Mbit/s.On the basis of this layout, the receiving blind spot disappear slowly and the intersymbol interference increasewith the increase of FOV. When the receiving angle is 43°, the average SNR reach maximum value and meet the best indoor coverage. Under this condition the multipath effect and the ISI can be effectively reduced and the system performance can be highly improved.
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