可见光通信中无人机搜寻通信光源的优化方法  

Optimization Methods for UAVs to Search Light Source in VLC

作　　者：肖华 王艳菊 王湛朗 郭闯 姜淏予 XIAO Hua;WANG Yanju;WANG Zhanlang;GUO Chuang;JIANG Haoyu(School of Electronic and Information Engineering,Guangdong Ocean University,Zhanjiang 524088,China;Department of Electrical&Electronic Engineering,Nanyang Technological University,639798,Singapore;School of Mathematics and Computing,Xiangtan University,Xiangtan 411105,China)

机构地区：[1]广东海洋大学电子与信息工程学院,广东湛江524088 [2]新加坡南洋理工大学电子与电气工程学院,新加坡639798 [3]湘潭大学数学与计算科学学院,湖南湘潭411105

出　　处：《发光学报》2023年第12期2277-2286,共10页Chinese Journal of Luminescence

基　　金：国家自然科学基金(62304054);广东省教育厅青年创新人才项目(2020KQCX026);广东省教育厅特色创新项目(2022KTSCX050);湛江市海洋青年人才创新项目(2022E05003);广东海洋大学科研启动经费资助项目(060302112101)。

摘　　要：提出了一种解决无人机(Unmanned aerial vehicle,UAV)在可见光通信(Visible‐light communication,VLC)中光源定位不准确的方法,该方法基于扩大及规律缩小搜索路径的方法,最终找到光源以及最佳通信位置。为了提高本方法的搜索成功率(η),本文针对通信光源的光分布对η、搜索总路程的影响,以及光电探测器的探测位置、探测接收角对接收光功率、η的影响作出了分析。得到了在满足UAV探测功率阈值的条件下,光源提供的三维覆盖范围随光源朗伯系数的变化情况,可用于预估UAV在不同发光条件下的η。以等边六边形搜索路径为例,在理想朗伯体条件下,UAV在光源覆盖半径最大为0.78 m时,η最高可高达0.74。本方法理论上避免了UAV定位不准确导致的无法实现可见光通信的问题,并提出通过优化搜索路径和光源的出光设计提高光源搜索成功率的方案,为UAV可见光通信的实现提出了解决方案。We proposed a method to solve the problem of inaccurate positioning for unmanned aerial vehicles(UAVs)in visible-light communication(VLC).To sense the light source and find the optimum position for communication,the proposed method expands the search path first and then regularly narrows the search path.In order to improve the success rate(η)of this method,we analyzed the influence of light distribution of the light source onηand the searching distance,and also studied the influence of the position and the receiving angle of the photodetector on the receiving power andη.Three-dimensional(3D)coverage range of the light source,which is determined by the Lambert coefficient and the threshold optical power that can be sensed by the photodetector,is obtained to estimateηof UAV under different circumstances.Taking the searching path of the equilateral hexagonal for example,ηcan reaches up to 0.74 with the covering radius of the light source of 0.78 m by using idea Lambert-distributed light source.The proposed method avoids the inaccurate positioning of UAV,which causes the problem for the UAV to find the communication position in VLC.We theoretically proposed a solution to improveηby light-emission designing and path optimizing,providing the solution for UAVs to realize VLC.

关 键 词：可见光通信 无人机 光分布 优化方法 

分 类 号：TN929[电子电信—通信与信息系统]