摘要
白光发光二极管(LED)的发光模型是室内可见光定位系统设计的重要基础,发光模型参数不准确会严重影响可见光定位的精度。针对这一问题,文章提出了一种朗伯模型参数优化方法,该方法利用基于接收信号强度的可见光室内技术中朗伯模型参数对定位误差的影响,通过调整朗伯指数寻找最小测距误差,当测距误差最小时,所对应的朗伯指数与LED的真实朗伯指数最为接近。仿真了室内5m×5m×3m的场景,结果表明,朗伯模型参数优化方法能显著提高可见光室内定位精度,也验证了朗伯模型参数优化方法的可行性及有效性。
The luminous model of the white Light Emitting Diode(LED)is an important basis for the design of the indoor visible light positioning system.The inaccurate parameters of the luminous model seriously affect the accuracy of the visible light positioning.In order to solve this problem,a method for estimating the order of the Lambertian emission is presented.In this paper,Received Signal Strength(RSS)-based visible light indoor positioning system,which calculates the distance-measuring error between visible light receiver and the visible light transmitter(LED)by adjusting the Lambertain emission order is developed.When the distance-measuring error is minimum,the corresponding Lambertain emission order is considered closest to the reality Lambertain emission order of the LED.Through the simulation indoor scene 5 m×5 m×3 m,the Lambertian parameter optimization method can significantly improve the indoor positioning accuracy of visible light position system.The experimental results verify the feasibility and effectiveness of the Lambertian model parameter optimization method.
作者
成顺利
闫坤
李卓
李昂阳
CHENG Shun-li;YAN Kun;LI Zhuo;LI Ang-yang(School of Information and Communication,Guilin University of Electronic Technology,Guilin 541000,China)
出处
《光通信研究》
北大核心
2018年第5期69-73,共5页
Study on Optical Communications
基金
桂林电子科技大学研究生教育创新计划资助项目(2017YJCX19)
