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基于接收信号强度比较和位置计算方法改进的APIT定位算法
发表时间：2010-04-30 浏览量：2025 下载量：915
| 全部作者： | 黄小瑛，赵清华，王华奎 |
| 作者单位： | 太原理工大学信息工程学院 |
| 摘 要： | 对无线传感器网络（wireless sensor network，WSN）定位算法中的近似三角形内点测试（approximate point-in-triangulation test，APIT）算法进行改进。原算法在定位精度和执行效率方面都有待提高。采用在APIT测试前比较锚节点与邻居节点接收信号强度和用计算三角形质心的重心作为未知节点估计的方法对原算法进行改进。仿真结果表明：与传统APIT算法相比，改进算法在不需要增加节点硬件开销的基础上能更有效地提高定位精度，并且算法简单、计算量小，具有较普遍的工程应用意义。 |
| 关 键 词： | 无线传感器网络；APIT定位算法；接收信号强度比较；位置计算方法 |
| Title： | APIT location algorithm based on comparison of received signal strength and improved calculation method |
| Author： | HUANG Xiaoying, ZHAO Qinghua, WANG Huakui |
| Organization： | College of Information Engineering, Taiyuan University of Technology |
| Abstract： | Approximate point-in-triangulation test (APIT)， which is one of the localization algorithms for wireless sensor networks, is improved in this paper. The purpose is to improve the original algorithm in positioning accuracy and implement efficiency. In this paper, before the APIT test, received signal strengths of anchor nodes and neighbor nodes were compared in order to improve the original algorithm in two kinds of susceptible misjudgment when the unknown node within a short distance away from the side of the triangle. Simulation results show that the improved APIT algorithm can improve the positioning accuracy effectively without increasing hardware consumption comparing with conventional APIT algorithm. Furthermore, the algorithm is simple and needs small amount of calculation, so it has general engineering significance. |
| Key words： | wireless sensor networks; approximate point-in-triangulation test localization algorithm; comparison of received signal strength; position calculation method |
| 发表期数： | 2010年4月第8期 |
| 引用格式： | 黄小瑛，赵清华，王华奎. 基于接收信号强度比较和位置计算方法改进的APIT定位算法[J]. 中国科技论文在线精品论文，2010，3（8）：769-773. |
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