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arXiv 1909.12985eess.SP
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室内可见光定位的自适应卡尔曼跟踪

Adaptive Kalman Tracking for Indoor Visible Light Positioning

Yusuf Eroglu, Fatih Erden, Ismail Guvenc

摘要:

可见光通信(VLC)利用发光二极管(LED)来传输无线数据。VLC网络还可用于在全球定位系统(GPS)信号较弱的室内环境中定位移动用户。然而,移动VLC设备的视线(LOS)链路很容易被阻塞,这降低了定位的准确性。在本文中,我们研究跟踪VLC用户时,VLC接入点(AP)链路的可用性改变了用户的路由。我们提出了一个单一的可用AP的本地化方法,并使用已知的估计方法时,大量的AP可用。利用卡尔曼滤波器跟踪移动用户可以提高定位精度,但一般的卡尔曼滤波器没有考虑测量方法的瞬时变化。为了包括这些信息的位置估计,我们实现了自适应卡尔曼滤波器,通过修改滤波器参数的基础上,对用户的AP的可用性。仿真结果表明,该方法将定位的均方根误差(RMSE)降低到原始估计的30%-50%。

英文摘要:

Visible light communication (VLC) utilizes light-emitting diodes (LEDs) to transmit wireless data. A VLC network can also be used to localize mobile users in indoor environments, where the global positioning system (GPS) signals are weak. However, the line-of-sight (LOS) links of mobile VLC devices can be blocked easily, which decreases the accuracy of localization. In this paper, we study tracking a VLC user when the availability of VLC access point (AP) link changes over the user's route. We propose a localization method for a single available AP and use known estimation methods when a larger number of APs are available. Tracking mobile users with Kalman filter can increase the accuracy of the positioning, but the generic Kalman filter does not consider instant changes in the measurement method. In order to include this information in the position estimation, we implement an adaptive Kalman filter by modifying the filter parameters based on the availability of APs to the user. Simulation results show that the implemented method decreases the root-mean-square error (RMSE) of the localization down to 30%-50% of the original estimation.

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