多输入多输出可见光通信的天线布局研究

发布时间：2018-08-14 12:48

【摘要】：通过改变LED及光电探测器(PD)的空间分布,得到不同的天线布局,同时通过改变LED间距dTX、发射端和接收端平面的高度差h等条件,得到了不同的信道传输矩阵H,仿真分析了以上各种情况下的室内可见光通信系统(VLC)的性能。结果表明,影响VLC性能的关键参数包含最小欧式距离dmin和行列式Det(H)。根据系统的关键参数,将天线布局分为圆形布局和格点布局两类,圆形布局是指所有LED或PD均匀地分布在一个圆上,而格点布局是指所有LED或PD均分布在二维平面中的格点上。仿真结果表明,当dTX变化时,在采用圆形布局的系统中,行列式Det(H)是影响误码率(BER)的关键因素;在采用格点布局的系统中,dmin和Det(H)均是影响系统误码率的关键因素,但在dTX的一定范围内dmin是决定系统性能的关键因素。而当h发生变化时Det(H)是影响系统性能的关键因素。
[Abstract]:By changing the spatial distribution of LED and (PD), different antenna configurations are obtained. At the same time, by changing the LED spacing, the height difference h between the transmitter and the receiver is obtained. Different channel transmission matrices are obtained, and the performance of indoor visible light communication system (VLC) is simulated and analyzed. The results show that the key parameters affecting VLC performance include minimum Euclidean distance dmin and determinant Det (H). According to the key parameters of the system, the antenna layout is divided into two types: circular layout and lattice layout. Circular layout means that all LED or PD are uniformly distributed on one circle, and lattice layout means that all LED or PD are distributed on the grid points in two-dimensional plane. The simulation results show that the determinant Det (H) is the key factor to affect the bit error rate (BER) (BER) in the system with circular layout when dTX is changing, and that both dmin and Det (H) are the key factors to affect the BER in the system with lattice layout. But dmin is the key factor to determine the system performance in a certain range of dTX. When h changes, Det (H) is the key factor affecting system performance.
【作者单位】：北京交通大学光波技术研究所;北京交通大学全光网络与现代通信网教育部重点实验室;
【基金】：国家自然科学基金(61102048) 中央高校基本科研业务费专项资金(2015JBM007) 北京交通大学人才基金(2006RC022)资助项目
【分类号】：TN929.1

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