摘要
建筑物结构等因素导致全球定位系统GPS在室内定位精度急剧下降。针对复杂室内环境,提出一种基于线性规划的电磁波自由传播衰减自适应模型,提高室内蓝牙定位系统的精度。通过高斯滤波优化RSSI值校准基准信号,运用线性规划方法动态预测环境衰减系数,进而获取精确的目标节点距离。实验结果表明,在复杂室内环境下,当节点与参考节点距离小于1.5 m时,绝对误差不大于0.25 m;当距离大于1.5 m,相对误差小于7.8%,可满足室内定位的需求。
Building structure and other factors lead to the performance deterioration of GPS indoor positioning system. An adaptive model of electromagnetic wave free propagation attenuation is proposed to improve the blue- tooth positioning performance in the complex indoor environment. The optimization of calibration of RSSI by Gaussian filter, together with dynamic prediction of attenuation coefficient, is used to obtain the accurate distance between the nodes. Experimental results show that when the absolute distance difference between reference node and actual node is not far from 1.5 meters, the absolute error is less than 0.25 meters, and when the absolute distance difference is more than 1.5 meters, the relative distance difference is less than 7.8% in the complex in-door environment.
出处
《苏州科技大学学报（工程技术版）》
CAS
2017年第4期76-80,共5页
Journal of Suzhou University of Science and Technology（Engineering and Technology Edition）
基金
国家自然科学基金项目(61602334
61502329
61401297)
住房与城乡建设部科学技术项目(2015-K1-047)
江苏省自然科学基金项目(BK20140283)
关键词
室内定位
蓝牙定位
线性规划
自适应
indoor positioning
bluetooth positioning
linear programming
adaptive
