冯人海 ,常燕燕 ,葛磊蛟 ,杨爱超
AuthorsHTML:冯人海 ¹ ，常燕燕 ² ，葛磊蛟 ¹ ，杨爱超 ³
AuthorsListE:Feng Renhai,Chang Yanyan,Ge Leijiao,Yang Aichao
AuthorsHTMLE:Feng Renhai¹，Chang Yanyan²，Ge Leijiao¹，Yang Aichao³
Unit:1. 天津大学电气自动化与信息工程学院，天津 300072；
2. 天津大学微电子学院，天津 300072；
3. 国网江西省电力有限公司供电服务管理中心，南昌 330032

Unit_EngLish:1. School of Electrical and Information Engineering，Tianjin University，Tianjin 300072，China；
2. School of Microelectronics，Tianjin University，Tianjin 300072，China；
3. Power Supply Service Management Center，State Grid Jiangxi Electric Power Co.，Ltd.，Nanchang 330032，China

Abstract_Chinese:可见光通信(visible light communication，VLC)无电磁干扰、成本低且绿色低碳，符合国家节能减排战 略．将 VLC 系统与无线能量传输技术结合在一起，可实现可见光携能通信．因此针对电网中高压输电线路的巡检 问题，对点对多点(单光源多接收机)的 VLC 进行研究，通过收集可见光信号携带的能量可实现信息与能量的同时 传输，基于接收功率和接收机的相对位置，提出三角定位算法．为提高计算速率实现实时定位，根据泰勒公式和隐 函数存在定理并引入时间变量，进一步提出线性迭代定位算法．此外，针对信道模型中噪声对定位精度的影响，利 用隐马尔可夫模型(hidden Markov model，HMM)进行在线去噪，实现光源定位算法的优化．仿真结果表明，提出的 线性迭代算法只有固定开销，测量次数不会影响其计算速度，测量误差可以控制在 6 cm 范围之内；经在线去噪 后，90%的数据点测量误差可控制在 5 cm 范围之内．
Abstract_English:Visible light communication(VLC)technology conforms to the national energy conservation and emission reduction strategy due to its anti-electromagnetic interference，low cost，green properties，and low carbon use. Combining the VLC system with wireless energy transmission technology，visible light energy carrying communication can be realized. To solve the problem of inspecting high-voltage transmission lines in the power grid，in this study，we investigated point-to-point VLC(single light source and multiple receivers)，whereby information and energy can be transmitted simultaneously by collecting the energy carried by the visible light signal. We propose a triangle positioning algorithm based on the received power and relative positions of the receivers. To improve the calculation speed and realize real-time positioning，we present a linear iterative location algorithm that uses the Taylor formula and the implicit function theorem，and we introduce a time variable. In addition，to address the influence of channel-model noise on the positioning accuracy，we use a hidden Markov model(HMM)for online denoising to optimize the light-source-positioning algorithm. Simulation results show that the proposed linear iterative location algorithm has a fixed overhead，the measurement times do not affect its calculation speed，and the measurement error can be controlled to within 6 cm. After online denoising，90% of the data-point measurement error can be controlled to within 5 cm.
Keyword_Chinese:可见光通信；能量；接收功率；线性迭代定位；隐马尔可夫模型
Keywords_English:visible light communication(VLC)；energy；received power；linear iterative location；hidden Markov model(HMM)

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