可见光定位技术及光源阵列布局优化研究

发布时间：2018-03-21 20:10

本文选题：可见光通信　切入点：室内定位　出处：《解放军信息工程大学》2014年硕士论文　论文类型：学位论文

【摘要】：可见光通信是利用白光LED(Lighting Emitting Diode)固态光源在照明同时实现通信的新型绿色通信技术,具有泛在覆盖、节能降耗、健康安全、定向辐射、布设简单、成本低廉、电磁兼容性良好等突出优点。基于可见光通信的新型室内定位方法具有室内传统无线定位方法难以替代的优势,因此在室内无线定位领域具有良好的应用前景,成为近年来该领域的研究热点。本文基于典型可见光通信室内无线定位模型,深入研究可见光定位技术中光源阵列布局优化问题,主要研究内容与创新点如下:1.针对典型可见光通信室内定位模拟环境,推导了室内待测平面定位误差分布性能限(克拉美罗界)和定位性能最佳的光源布局。在满足室内光照条件要求的前提下,通过推导不同光源布局下的待测点克拉美罗界,从理论上给出了最佳的光源布局。在此基础上,使用高斯-牛顿迭代算法进行了仿真分析,对推导出的克拉美罗界进行了正确性验证,仿真结果表明根据推导克拉美罗界设计的可见光源阵列布局较其它布局可以得到更好的定位性能。2.分析了一次反射对于定位性能的影响。针对存在一次反射的情况,分析了简化条件和复杂条件两种情况下反射信道的特点。在简化条件的基础上,研究了待测平面上的光照度分布和待测点定位误差的克拉美罗界分布,分析了一次反射对定位系统性能的影响,为存在一次反射的可见光源阵列布局方法提供了指导依据。3.针对照明与定位不同需求,对光源阵列布局进行了联合优化。针对不同应用环境中的多个应用需求目标,采用四种多目标优化方法进行求解,对各个目标性能指标进行了对比分析,以达到照明和定位综合性能最符合应用环境的要求,并通过仿真对各种方法进行了效能分析。4.针对矿下平台,结合项目组实际研究情况,提出了一种适用于煤矿、地铁、公路隧道、大型建筑物的走廊等空间狭长区域内的定位方法。介绍了文中光源布局及定位算法在煤矿井下综合信息系统中的实际应用。
[Abstract]:Visible-light communication is a new kind of green communication technology, which uses white LED(Lighting Emitting Diode-based solid-state light source to realize communication while lighting. It has universal coverage, energy saving and consumption reduction, health and safety, directional radiation, simple layout and low cost. The new indoor positioning method based on visible light communication has the advantage that the traditional indoor wireless location method is difficult to replace, so it has a good application prospect in the field of indoor wireless location. Based on the typical indoor wireless location model of visible light communication, the optimization of light source array layout in visible light location technology is deeply studied in this paper. The main research contents and innovations are as follows: 1. Aiming at typical indoor location simulation environment of visible light communication, In this paper, the error distribution performance limit (Clemero boundary) and the optimal light source layout are derived. On the premise of satisfying the indoor illumination requirements, the Clamello boundary of the measuring point is deduced under different light source configurations. The optimal light source layout is given theoretically. On this basis, the simulation analysis is carried out by using Gao Si Newton iterative algorithm, and the correctness of the derived Clamero boundary is verified. The simulation results show that the location performance of the visible light source array designed by the derivation of Clemero boundary is better than that of other layouts. 2. The effect of primary reflection on location performance is analyzed. In this paper, the characteristics of reflection channel under both simplified and complex conditions are analyzed. On the basis of the simplified condition, the distribution of illumination on the plane to be measured and the distribution of the Crameiro boundary of the location error of the point to be measured are studied. This paper analyzes the effect of primary reflection on the performance of positioning system, and provides the guidance basis for the layout method of visible light source array with primary reflection. 3. According to the different requirements of illumination and location, The array layout of light source is optimized jointly. Four kinds of multi-objective optimization methods are used to solve the problem, and the performance of each target is compared and analyzed. In order to achieve the comprehensive performance of lighting and positioning most in line with the requirements of the application environment, and through the simulation of various methods of effectiveness analysis .4. in view of the platform under the mine, combined with the actual research situation of the project team, a kind of suitable for coal mine, subway, The location method in long and narrow area of highway tunnel and corridor of large building is introduced. The practical application of the light source layout and location algorithm in the comprehensive information system of underground coal mine is introduced in this paper.
【学位授予单位】：解放军信息工程大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.1

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