摘要随着物联网技术的兴起,无线传感器网络作为一种全新的信息处理和获取的方法,可以在军事、环境、生态等广泛的领域内实现监测、追踪等功能,而网络节点的定位是其应用的基础。文章首先介绍了无线传感器网络的背景、当前应用、研究的现状,然后对节点定位技术相关的原理、概念及基本的测距技术,最后着重综述了一些具有代表性的算法原理。通过对已有算法的分析比较,得出DV-HOP定位算法的优缺点。文章详细介绍了其节点定位的过程的三个阶段,分析了在节点定位过程中不良节点、网络拓扑结构、信标节点比率对定位性能的影响。然后引用一种基于正则化的DV-Hop算法,在坐标值解算阶段采用基于Tikhonov正则化的方法代替三边测量法或极大似然法计算节点的位置。使用Matlab7.12进行仿真,得到节点的绝对定位误差图、定位误差随信标节点数增加时变化曲线、对其进行比较,得到该算法的节点定位误差要低于传统DV-Hop算法。67753
毕业论文关键词 无线传感器网络 节点定位 定位算法 Matlab仿真 DV-Hop
Title Design and Simulation of DV-Hop Localization Algorithm in Wireless Sensor Network
Abstract
With the development of the Internet of things, the wireless sensor network is a new processing method that can realize the monitoring function in a wide range of areas, and the location of nodes is the basic. Firstly, this article introduces the status and application background of WSN. Then talking about the node localization technology related principles, concepts and basic ranging technology. Finally emphatically reviewed the algorithm some representative principle. To get disadvantages of the DV-Hop algorithm by comparisoning. The paper introduces the three stages of the localization process. Then refer to a kind of improved algorithm, calculating the node position with the tikhonov method instead of three edge measuring method or the method of maximum likelihood position coordinates. Then obtaining the positioning error graphs, positioning errors with beacon nodes increase by using Matlab7.12. Get the node localization error of this algorithm is lower than that of the traditional DV-Hop algorithm.
Keywords WSN Node Location Matlab Simulation DV-Hop
毕业设计说明书(论文)外文摘要
目 录
1 绪论 1
1.1无线传感器网络发展背景及意义 1
1.2 无线传感器网络的发展现状 3
1.3 章节安排 4
2. 无线传感器网络定位算法 5
2.1相关概念及性能指标 5
2.2 节点主要测距技术 6
2.2.1 基于接收信号强度的测距技术 6
2.2.2 根据信号到达时间测距 7
2.2.3 根据到达时间差的测距技术 7
2.2.4 根据到达角度测距 8
2.3 无线传感器网络节点定位算法 8
2.3.1 三边(多边)测量法 9
2.3.2 三角测量法 10
2.3.3 多边测量法的极大似然估计 10
2.3.4 质心算法 12
3 DV_Hop算法