基于RSSI动态路径损耗的定位算法

The Localization Algorithm Based on Dynamic RSSI Path Loss

传统接收信号强度指示定位算法具有成本低、使用方便等优点,但是由于环境的变化,使得路径损耗指数变化,导致定位精度大大降低。该文提出一种基于接收信号强度指示动态路径损耗的定位算法,首先,计算出环境损耗指数,并将每个值与对应的信号强度损耗值记录在数据库中;其次,通过接收到的信号强度指示选取路径损耗指数,利用三边定位测量算法,通过最小二乘法来计算获得待定位标签的坐标位置;最后,在MATLAB平台验证算法的有效性并进行实验。

Traditional received signal strength indication（ RSSI） location algorithm has the advantage of low cost,ease of use. But due to environmental changes,the path loss index changes,resulting in location accuracy greatly reducing. A localization algorithm based on dynamic RSSI path loss index is presented. First, calculate the path loss index,and each value with a corresponding loss of signal intensity values are recorded in the database; Secondly, select a path loss index with the RSSI, using the triangular positioning measurement algorithm,and obtain the coordinates of the label to be positioned by the least squares method. Finally,verify the effectiveness of the algorithm on MATLAB platform and conduct experiments.