采用角度分集接收技术的光学天线设计

Optical receiving antenna design based on angle diversity technology

为了克服可见光通信系统中码间干扰的影响,利用角度分集接收技术,提出了在半球体上分布多个朝向不同的光锥作为光学接收天线新方法。应用Zemax光学设计软件,结合Matlab工具和Origin软件的数据处理分析,通过仿真单个光锥在不同半顶角取值时小端面上的光强值随光线入射角的变化量,拟合得到了相应的函数表达式和曲线图;并在光锥集光器分布夹角的数值分析基础上,根据同一个光信号在相邻两个光锥小端面上的光强关系,确定了光锥两两之间的夹角,给出了具体的布局设计方案;最后讨论了整个半球系统上总光强的接收情况。

To overcome the problem of inter-symbol interference（ISI） in visible light communication（VLC） system,the optical receiving antenna in the form of optical cones distributing with different direction on a hemispheroid was proposed based on the angle diversity receiver technology.With Zemax optical design software,the beam of light transmission in an optical cone was analyzed,then,the optical intensities on the small end of a single optical cone with different half-apex angles were simulated under the condition of different incident angles.The optical intensity function and the corresponding graph were fit with Matlab and Origin softwares.Moreover,based on the simulation result and the related numerical analysis,the angle between pairwise optical cone on a hemispheroid was obtained,and then the distribution design of optical cones on the optical receiver was achieved.Finally,the total optical intensity receving of optical cones on a hemispheroid was discussed.