室内可见光定位系统的多径反射分析
Multipath Reflections Analysis on Indoor Visible Light Positioning System
摘要：
可见光通信（VLC）是近年来研究的热点，在室内环境中有着广泛的应用。特别地，对于基于位置的服务（LBS），可见光还提供了用于室内定位的实用解决方案。多径色散是复杂室内环境中的主要问题之一。它不仅影响通信性能，而且影响定位精度。在本文中，我们调查的多径反射对室内VLC定位系统的定位精度的影响。结合确定性和改进的蒙特卡罗（CDMMC）方法被用来估计考虑多径反射的信道冲激响应。由于接收信号强度（RSS）信息用于定位算法，因此首先计算来自典型房间配置中的一个发射器的功率分布。然后，定位精度的均方根误差方面得到和分析。
英文摘要：
Visible light communication (VLC) has become a promising research topic in recent years, and finds its wide applications in indoor environments. Particularly, for location based services (LBS), visible light also provides a practical solution for indoor positioning. Multipath-induced dispersion is one of the major concerns for complex indoor environments. It affects not only the communication performance but also the positioning accuracy. In this paper, we investigate the impact of multipath reflections on the positioning accuracy of indoor VLC positioning systems. Combined Deterministic and Modified Monte Carlo (CDMMC) approach is applied to estimate the channel impulse response considering multipath reflections. Since the received signal strength (RSS) information is used for the positioning algorithm, the power distribution from one transmitter in a typical room configuration is first calculated. Then, the positioning accuracy in terms of root mean square error is obtained and analyzed.
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