| 题名 | 无线传感器网络节点自定位算法研究 |
| 作者 | 张恒 |
| 学位类别 | 硕士 |
| 答辩日期 | 2011-05-30 |
| 授予单位 | 中国科学院研究生院 |
| 授予地点 | 北京 |
| 导师 | 张岩 |
| 关键词 | 无线传感器网络 节点定位 圆幂 根心 |
| 学位专业 | 计算机应用技术 |
| 中文摘要 | 无线传感器网络是21世纪最重要的技术之一，节点自定位技术又是无线传感器网络的主要支撑技术之一。在大多数无线传感器网络应用中，确定传感器节点的物理位置是最基本的要求。节点定位技术的研究对无线传感器网络技术的进一步发展，以及其将来越来越广泛的使用具有重要的理论意义和应用价值。 本文旨在对无线传感器网络节点自定位技术进行相关的讨论和研究。本文首先介绍了无线传感器网络的组织结构、现状与研究领域，并阐述了研究无线传感器网络节点定位的重要意义。在第四章本文重点介绍了无线传感器节点定位的一些基本概念，节点定位算法的分类，节点定位的计算方法，并对三种计算节点位置的方法：三边测量法、三角测量法、极大似然估计法进行了着重介绍。并对国内外具有代表性的节点定位算法如凸规划定位算法等做了详细介绍。 针对定位过程由于信标节点共线及信标节点分布不均匀造成定位误差过大的问题，本文提出了一种基于根心的定位算法。该方法通过计算信标节点之间的根心，可以自然过滤掉共线的信标节点所造成的定位误差，同时本文还引入加权思想来校正定位误差最终得到未知节点的位置坐标，并通过仿真实验来验证算法的正确性。 最后，本论文作了全文总结，并明确了现阶段研究中考虑不足的地方以及今后的研究方向。 |
| 英文摘要 | Wireless sensor network is the most important technologies in the 21st century, one of the node from the positioning of wireless sensor networks is the main supporting technologies. In most wireless sensor network applications, to determine the physical location of sensor nodes is a basic requirement. Technology node localization of wireless sensor network technology, further development, as well as its increasingly widespread use of the future has important theoretical significance and application value. This article from the wireless sensor network nodes targeting technology related discussions and research. This paper describes the organizational structure of wireless sensor networks, present and research, and described the study of wireless sensor node localization significance. In the fourth chapter This paper focuses on wireless sensor nodes targeting some of the basic concepts of the classification of localization algorithms, the calculation of node localization, and the location of the three methods of computing nodes: trilateration, triangulation method, which greatly likelihood method were highlighted. And foreign representative localization algorithms such as convex programming positioning algorithm described in detail. As for the positioning beacon nodes were lines and uneven distribution of beacon nodes is too large positioning error caused the problem, we propose a localization algorithm based on the root of the heart. The method by calculating the root nodes beacon heart, can naturally filter out collinear beacon position error caused by the node, but this also introduces the thought to correct the positioning error weighted by the unknown node, the final position coordinates, and simulation experiments to verify the correctness of the algorithm. Finally, we made a full summary, and clearly considered in the study of the current deficiencies and future research directions. |
| 内容类型 | 学位论文 |
| 源URL | [http://ir.xjipc.cas.cn/handle/365002/4413]  |
| 专题 | 新疆理化技术研究所_多语种信息技术研究室 |
| 作者单位 | 中国科学院新疆理化技术研究所 |
| 推荐引用方式 GB/T 7714 | 张恒. 无线传感器网络节点自定位算法研究[D]. 北京. 中国科学院研究生院. 2011. |
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