Impact of multipath effects on theoretical accuracy of TOA-based indoor VLC positioning system  

作　　者：Xuqing Sun Jingyuan Duan Yonggang Zou Ancun Shi 

机构地区：[1]Optoelectronic System Laboratory, Institute of Semiconductors, Chinese Academy of Sciences [2]National Key Laboratory on High Power Semiconductor Lasers, Changchun University of Science and Technology

出　　处：《Photonics Research》2015年第6期296-299,共4页光子学研究（英文版）

基　　金：supported by the National Key Basic Research Program of China (973 program) under grant 2013CB32920;the Natural Science Foundation of China under grant 61375083

摘　　要：This paper discusses the time-of-arrival(TOA) based indoor visible light communication(VLC) positioning system in a non-line-of-sight environment. The propagation delay is assumed to be gamma distributed. The generalized Cramer–Rao lower bound for multipath propagation is derived as the theoretical accuracy limitation. The performance of the positioning system is affected by the shape parameter and the scale parameter of gamma distribution.The influences on positioning accuracy of multipath effects are analyzed through discussing the physical meaning of the gamma distribution parameters. It is concluded that the lower bound of positioning accuracy is attained when variance of the non-line-of-sight propagation-induced path lengths is zero. The simulation result provesthat the theoretical positioning accuracy is in the order of centimeters with the given scenario.This paper discusses the time-of-arrival(TOA) based indoor visible light communication(VLC) positioning system in a non-line-of-sight environment. The propagation delay is assumed to be gamma distributed. The generalized Cramer–Rao lower bound for multipath propagation is derived as the theoretical accuracy limitation. The performance of the positioning system is affected by the shape parameter and the scale parameter of gamma distribution.The influences on positioning accuracy of multipath effects are analyzed through discussing the physical meaning of the gamma distribution parameters. It is concluded that the lower bound of positioning accuracy is attained when variance of the non-line-of-sight propagation-induced path lengths is zero. The simulation result provesthat the theoretical positioning accuracy is in the order of centimeters with the given scenario.

关 键 词：VLC TOA Impact of multipath effects on theoretical accuracy of TOA-based indoor VLC positioning system 

分 类 号：TN929.1[电子电信—通信与信息系统]