期刊论文

中文

实验室研究与探索

1006-7167

2017

36

2

112-116+144

10.3969/j.issn.1006-7167.2017.02.027

国家自然科学基金项目资助（61202470）；

本校为其他机构

在无线传感器网络定位系统中,由于元器件品控和外界环境等因素的差异,以往测出的衰减模型参数的经验值并不能适应当下的定位环境,以至定位精度很低,实验过程不具重复性。根据待定位节点临近的参考节点多次互发报文,经过最小二乘法拟合出衰减模型参数。算法对所有参考节点根据RSSI值进行排序,选取RSSI值最小的3个节点用三边定位算法计算待定位节点坐标。最后,设计了一个基于ZStack协议栈的定位原型系统。算法经过进一步简化,大幅度减小了由于衰减模型参数不准确对定位精度的影响,为今后深入研究室内定位打下基础。

In the localization system of wireless sensor networks,due to differences in quality control and external environment,empirical value of attenuation model cannot meet the current environment,the result may lead to low positioning accuracy and non-repeatable experiment. In this paper,the parameters of the model are fitted by the least square method,according to the reference nodes which send messages mutually close to the nodes to be located. All the reference nodes are sorted by their RSSI values,and the three nodes with the smallest RSSI values are selected to calculate the coordinates of the...