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首页> 外文期刊>International Journal of Distributed Sensor Networks >An indoor Wi-Fi access points localization algorithm based on improved path loss model parameter calculation method and recursive partition
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An indoor Wi-Fi access points localization algorithm based on improved path loss model parameter calculation method and recursive partition

机译：基于改进路径损耗模型参数计算方法和递归划分的室内Wi-Fi接入点定位算法

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The localization accuracy of the existing methods for indoor Wi-Fi access points ranging-based localization depends on the accuracy of the received signal strength measured. Because the existing ranging-based methods are interfered by various indoor environmental factors, it is difficult to accurately measure the received signal strength, which leads to the problem of low localization accuracy of the indoor Wi-Fi access points. An indoor Wi-Fi access points localization algorithm based on improved path loss model parameter calculation method and recursive partition is proposed in this article. The algorithm recursively partitions the region where the target Wi-Fi access points are located according to the idea of quadtree partition, and partitions it into same sub-grids, which is sequentially performed until the sub-grids are smaller than the set threshold. The detection device is used at the detection location of the grids to measure the received signal strength, which is from the detection points to the target access point, the grid center point is used as the location of the candidate target access point, the parameters in the path loss model are calculated by using the signal strength differences between the detection points, and then the distances between the detection points and the target access point are calculated by using the signal strength values from the detection points to the target access point. Finally, the location of the target access point is estimated by executing a localization algorithm, and the location of the grid center point closest to the target access point is taken as the location of the target access point. The experimental results show that under the premise that the target access point can be found, the proposed algorithm reduces the use of the device and improves the localization accuracy compared with the typical localization method.
机译：室内Wi-Fi接入点基于测距的现有方法的定位精度取决于所测量的接收信号强度的精度。由于现有的基于测距的方法会受到各种室内环境因素的干扰，因此难以准确测量接收信号强度，从而导致室内Wi-Fi接入点定位精度低的问题。提出了一种基于改进的路径损耗模型参数计算方法和递归分区的室内Wi-Fi接入点定位算法。该算法根据四叉树划分的思想递归划分目标Wi-Fi接入点所在的区域，并将其划分为相同的子网格，然后依次执行直到子网格小于设置的阈值。该检测装置用于网格的检测位置，以测量接收信号强度，即从检测点到目标接入点，网格中心点用作候选目标接入点的位置，参数通过利用检测点之间的信号强度差来计算路径损耗模型，然后利用从检测点到目标接入点的信号强度值来计算检测点与目标接入点之间的距离。最后，通过执行定位算法来估计目标接入点的位置，并且将最接近目标接入点的网格中心点的位置作为目标接入点的位置。实验结果表明，与典型的定位方法相比，该算法在能够找到目标接入点的前提下，减少了设备的使用，提高了定位精度。

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