Design and Performance Evaluation of Large-Scale VLC-Based Indoor Positioning Systems Under Impact of Receiver Orientation
Design and Performance Evaluation of Large-Scale VLC-Based Indoor Positioning Systems Under Impact of Receiver Orientation
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DOI：
10.1109/access.2020.2984027
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发表时间：
2020-01-01
期刊：
影响因子：
3.9
通讯作者：
Pham, Anh T.
中科院分区：
文献类型：
--
作者：
Mai, Duc H.;Le, Hoang D.;Pham, Anh T.
本文提出了完整的设计，包括物理层（PHY）和链路层的解决方案，并评估了基于可见光通信（VLC）的大规模室内定位系统（IPS）的性能。采用基于接收信号强度（RSS）技术的三角测量方法进行用户定位。为了在接收器处进行信号分离，每个 LED 和 x2019; 的位置都使用光学正交码 (OOC) 编码为唯一的位置标识 (ID)。提出了代码重用策略以有效利用代码资源。考虑到接收器方向的影响，还提出了一种新颖的增强方法来提高定位精度方面的系统性能。仿真结果表明，当极角相等时，受接收机方位影响，最大定位误差增大了一倍。所提出的定位增强方法在减少平均定位误差方面的有效性也得到了数值证实。对于链路层设计，提出了一种采用Golay码编码的12位ID的帧设计，用于纠错。实施了简单的概念验证并进行了实验，以分析操作范围和 ID 可检测性方面的整体系统性能。
This paper proposes a complete design, including solutions for both physical (PHY) and link layer, and evaluates the performance of large-scale indoor positioning systems (IPSs) based on visible light communications (VLC). The triangulation method based on received signal strength (RSS) technique is employed for user localization. For the sake of signal separation at the receiver, each LED & x2019;s position is encoded with a unique location identification (ID) using optical orthogonal codes (OOCs). A code re-use strategy is proposed to efficiently utilize the code resource. A novel enhancement method is also proposed to improve the system performance in terms of localization accuracy taking into account the impact of receiver orientation. Simulation results show that the maximum location error increases twice under the impact of receiver orientation when the polar angle is equal to. The effectiveness of the proposed localization enhancement method in reducing the average location error is also numerically confirmed. For the link layer design, a frame design with a 12-bit ID encoded by the Golay code for error correction is proposed. A simple proof-of-concept is implemented and experiments are conducted to analyze the overall system performance in terms of operation range and ID detectability.