摘要无线传感器网络涉及了多学科高度交叉的研究领域，同时它所涉及到的多项关键技术也有待研究者进一步的研究开发。无线传感器网络的应用范围非常广，有很好的应用前景。在无线传感器网络技术功能中，节点自身定位是其中一项最基本的功能，对传感器网络的应用起着关键性的作用。67344

本文首先介绍了无线传感器网络的相关知识和研究状况，然后介绍几种当前的无线传感器网络节点测距方法、定位原理以及节点定位技术。之后着重介绍基于RSSI校验的三角形质心定位算法。最后阐述运用Matlab仿真软件编写仿真程序并对算法进行仿真，得出结果后分析误差。

毕业论文关键词 无线传感器网络；RSSI；三角形质心定位；测距

毕业设计说明书（论文）外文摘要

Title   Design and Simulation of Weighted Centroid Localization Algorithm in Wireless Sensor Network              

Abstract

Wireless Sensor Network involves a highly crossing of  multidisciplinary research areas, and a number of key technologies it involves have to be developed further by investigator. Wireless Sensor Network has a very wide range of applications. The application prospect of Wireless Sensor Network is very broad. The Nodes Self-Positioning is one of the most basic functions in the Wireless Sensor Network Technology，and it plays a key role in the sensor network applications.

First, the related knowledge of Wireless Sensor Network and current situation of research are introduced. Second，several current Nodes Ranging Methods of Wireless Sensor Network are proposed. In addition, Localization Principle and the Technology of Node Positioning are introduced. Then，a Triangle Centroid Localization Algorithm based on the RSSI Calibration is proposed and focused .At last, the process of compiling the positioning algorithm and simulating the program by using the Matlab simulation software are expounded. After the result of simulation is given，the analysis on the errors of the algorithm is given.

Keywords  Wireless Sensor Network; RSSI；Triangle Centroid Localization; Ranging

目   次 

1  绪论 1

1.1 研究意义 1

1.2 无线传感器网络简介 1

1.3 课题主要研究内容 5

2  无线传感器网络定位技术 7

2.1 传感器网络定位技术 7

2.2 无线传感器网络定位特性 7

2.3 传感器节点定位的应用 8

2.4 测距方法 9

2.5 无线传感器节点定位基本原理 11

3 无线传感器网络节点自定位算法 14

3.1 定位系统和定位算法性能指标 14

3.2 无线传感器网络定位算法的分类 15

3.3 无线传感器网络经典定位算法 17

4.1 无线电信号传播路径损耗模型分析 20

4.2 基于RSSI校验的三角形质心定位算法 23

4.3 实验以及结果分析 27

结论 31

致  谢 33

参 考 文 献 34

1  绪论