为了满足航空旅客在机场候机大厅的位置服务需要，同时为了降低AP（Access Point）部署的高度对定位的影响，提出了一种基于信号强度和传播模型的三维定位技术。该方法首先采用最小二乘法确定传播模型的参数，再使用最小均方差实现定位。实验结果表明，该算法的误差在3 m 内，准确率达83.36%，能够满足旅客在机场候机厅内位置服务的需要。%To provide location-based service (LBS) in airport waiting hall, a three-dimensional location estimation method based on received signal strength and signal propagation model is proposed. Least-square approach has been applied to determine parameters of signal propagation model obtained in the first step, minimum mean squares error (MMSE) method is applied to estimate the position of target node. Compared with the two-dimensional location algorithms being widely used now, the three-dimensional location method takes into account the APs deployment highly influence on positioning, which is more suitable for this particular scene. Experimental results show that this method could greatly improve accuracy and precision, and the accuracy rate could reach 83.36% within error distance of 3 meter, so it′s an applicable technology for LBS in airport waiting hall.
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