一种新型的基于LQI的加权质心定位算法

A Novel Weighted Centroid Localization Algorithm Based on LQI

提出一种基于链路质量指示（LQI）的测距技术与加权质心定位算法相结合的新型定位算法。经过数据分析比较,验证了LQI要比接收信号强度指示（RSSI）更稳定、抗干扰能力更强。采用高斯滤波模型对实验测量值进行处理,增加了数据的准确性。建立基于RSSI和LQI的对数拟合测距公式,利用质心定位算法进行仿真实验,结果表明：采用基于LQI测距的加权质心算法定位,其定位精度有了较大提高,达到了较为理想的定位效果。

A new localization algorithm that the LQI-based ranging technology is combined with the weighted centroid localization algorithm is described. Through data analysis and comparison, the LQI has the more stability and stronger anti-interference ability than the RSSI. Using Gauss filter model to deal with the measured value of the experiments, the accuracy of the data is increased. The logarithmic ranging formula based on RSSI and LQI was established respectively. Simulation experiments using centroid localization algorithm are carried out. The results show that the improved weighted centroid localization algorithm based on LQI can further improve positioning accuracy, and achieve a good positioning effect.