论文标题
高覆盖率摄像头辅助接收的信号强度比算法用于室内可见光定位
A High Coverage Camera Assisted Received Signal Strength Ratio Algorithm for Indoor Visible Light Positioning
论文作者
论文摘要
在本文中，提出了一种称为增强的相机辅助接收信号强度比（ECA-RSSR）定位算法的高覆盖算法，用于可见光定位（VLP）系统。 ECA-RSSR的基本思想是利用摄像机捕获的视觉信息，首先估算可见光的发射角。基于入射角，ECA-RSSR利用由光电二极管（PD）计算出的接收信号强度比（RSSR）来估计LED和接收器之间距离的比率。基于欧几里得平面的几何定理，ECA-RSSR将距离的比率转换为绝对值。通过这种方式，ECA-RSSR仅需要3个LED来实现无方向的2D和3D定位，这意味着ECA-RSSR可以实现高覆盖率。基于距离的绝对值，采用线性最小平方方法来估计接收器的位置。因此，对于在PD和相机之间具有较小距离的接收器，ECA-RSSR的精度不取决于非线性最小平方方法的起始值，而ECA-RSSR的复杂性很低。此外，由于PD和相机之间的距离可以显着影响ECA-RSSR的性能，因此我们进一步提出了基于单视几何形状的ECA-RSSR的补偿算法。仿真结果表明，ECA-RSSR可以在80％的室内区域内实现厘米级别的准确性，对于PD和相机之间的接收器，接收器均具有较小且较大的距离。
In this paper, a high coverage algorithm termed enhanced camera assisted received signal strength ratio (eCA-RSSR) positioning algorithm is proposed for visible light positioning (VLP) systems. The basic idea of eCA-RSSR is to utilize visual information captured by the camera to estimate the incidence angles of visible lights first. Based on the incidence angles, eCA-RSSR utilizes the received signal strength ratio (RSSR) calculated by the photodiode (PD) to estimate the ratios of the distances between the LEDs and the receiver. Based on an Euclidean plane geometry theorem, eCA-RSSR transforms the ratios of the distances into the absolute values. In this way, eCA-RSSR only requires 3 LEDs for both orientation-free 2D and 3D positioning, implying that eCA-RSSR can achieve high coverage. Based on the absolute values of the distances, the linear least square method is employed to estimate the position of the receiver. Therefore, for the receiver having a small distance between the PD and the camera, the accuracy of eCA-RSSR does not depend on the starting values of the non-linear least square method and the complexity of eCA-RSSR is low. Furthermore, since the distance between the PD and camera can significantly affect the performance of eCA-RSSR, we further propose a compensation algorithm for eCA-RSSR based on the single-view geometry. Simulation results show that eCA-RSSR can achieve centimeter-level accuracy over 80% indoor area for both the receivers having a small and a large distance between the PD and the camera.
