室内可见光MIMO系统的金字塔形角度分集接收优化
Optimization of Pyramid Angle Diversity Reception for Indoor MIMO Visible Light Communication
投稿时间:2019-03-29  修订日期:2019-03-29
DOI:
中文关键词: 可见光通信  多输入多输出(MIMO)  角度分集  信道相关性  信道容量
英文关键词: visible light communication  multi-input multi-output  angle diversity  channel correlation  channel capacity
基金项目:国家自然科学基金(61002013、11147014)、 湖北省自然科学基金(2014CFA051)资助项目。 ,宋成志<sup>*</sup>,吕云龙,侯金
作者单位E-mail
杨春勇 中南民族大学 电子信息工程学院 cyyang@mail.scuec.edu.cn 
宋成志 中南民族大学 电子信息工程学院 1048304027@qq.com 
吕云龙 中南民族大学 电子信息工程学院  
侯金 中南民族大学 电子信息工程学院  
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中文摘要:
      为增强室内可见光多输入多输出(MIMO)通信系统的空间复用增益并降低信道相关性,提出一种金字塔型角度分集接收机模型。采用光线追踪分析方法建立室内系统模型及码间干扰模型,分析MIMO系统接收平面码间干扰(ISI)以及光功率分布。对接收机分集维度、旋转角、倾斜角以及发光二极管(LED)和光电检测器(PD)的空间布局进行多参数综合优化,数值仿真结果表明,水平旋转角为45°时,系统可获得最大信道容量。对传输速率为100Mbps的传输系统,LED间距为1.7m,倾斜角为50°时,信道容量可达最大。通过对分集参数的优化,可有效增强信道分集增益,减少码间干扰,提升接收的整体性能。
英文摘要:
      In order to enhance the spatial multiplexing gain and reduce the channel correlation in indoor visible multiple input multiple output (MIMO) communication, a pyramid angle diversity receiver model is proposed. Ray tracing method is adopted to establish the channel model and intersymbol interference(ISI) model. The ISI and optical power distribution of the receiving plane in MIMO system are analyzed, respectively. The diversity dimension, rotation angle, tilt angle, and spatial layout of light-emitting diodes (LEDs) and photodetectors (PDs) are optimized comprehensively. The numerical results show that when the horizontal rotation angle is 45°, the maximum channel capacity can be obtained. In the case of the transmission rate of system is 100Mbps, when the LED spacing is 1.7m and the tilt angle is 50°, the channel capacity can reach the maximum value. It is verified that the spatial multiplexing gain can be effectively enhanced, and the overall reception performance can be improved via optimizing the diversity parameters.
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