摘要
文章从现有RSSI测距换算公式出发,评述各类信号传播理论模型的基本原理和适用范围.以TI CC2530为核心构建实验节点,实地测量室内环境中2.4 GHz射频信号强度值,分析接收信号强度与节点间距之间的关系,运用5类常用的曲线拟合模型对实测数据进行参数估计,并逐一进行拟合优度检验和对比分析.验证实验结果表明,单高斯拟合模型对室内RSSI测距具有较高拟合精度和适用性.
The paper begins wi th an introduct ion to the existing RSSI ranging conversion equations and an anal-ysis on the basic principle and appl ication scope of various signal propagation theoretical models. By construc-ting experimental platform based on TI CC2530 SoC, the intensity of 2. 4GHz RF signal in indoor environment is measured. This paper also analyzes the quantitative relationship between RSSI and inter-node distance, and il-lustrates the parameter estimation process of 5 common curve fitting models with measured data. Finally, good-ness of fit is examined for each fitting model and a comparison analysis is performed. Verification test results show that Single Gaussian Curve Fitting Model performs well as a RSSI-based indoor ranging fitting model with high accuracy and wide applicability.
出处
《广州大学学报（自然科学版）》
CAS
2017年第1期56-62,共7页
Journal of Guangzhou University:Natural Science Edition
基金
国家自然科学基金资助项目(61403089)
国家级大学生创新训练资助项目(201511078014)
关键词
RSSI
室内测距
高斯拟合
最小二乘法
参数估计
RSSI
indoor ranging
Gauss Curve fitting
least square method
parameter estimation
