[1]张秀楠,邵建华,柯 炜,等.反射与噪声对室内可见光定位系统精度影响及其克拉美罗界[J].南京师范大学学报(自然科学版),2017,40(03):102.[doi:10.3969/j.issn.1001-4616.2017.03.015]
　Zhang Xiunan,Shao Jianhua,Ke Wei,et al.Errors and the Cramer-Rao Bound Caused by Reflectionand Noise on Visible Light Positioning System[J].Journal of Nanjing Normal University(Natural Science Edition),2017,40(03):102.[doi:10.3969/j.issn.1001-4616.2017.03.015]
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反射与噪声对室内可见光定位系统精度影响及其克拉美罗界()
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《南京师范大学学报》（自然科学版）[ISSN:1001-4616/CN:32-1239/N]

卷:
第40卷
期数:
2017年03期
页码:
102
栏目:
·物理学·
出版日期:
2017-09-30

文章信息/Info

Title:
Errors and the Cramer-Rao Bound Caused by Reflectionand Noise on Visible Light Positioning System
文章编号:
1001-4616(2017)03-0102-08
作者:
张秀楠; 邵建华; 柯 炜; 袁亚男; 聂 帅
南京师范大学物理科学与技术学院,江苏 南京 210023
Author(s):
Zhang Xiunan; Shao Jianhua; Ke Wei; Yuan Yanan; Nie Shuai
School of Physics and Technology,Nanjing Normal University,Nanjing 210023,China
关键词:
可见光; 定位; 反射; 噪声; 克拉美罗界
Keywords:
visible light; positioning; wall reflection; external noise; cramer-rao bound
分类号:
TN929.1
DOI:
10.3969/j.issn.1001-4616.2017.03.015
文献标志码:
A
摘要:
基于到达信号强度(RSS)测距的方法,可见光室内定位系统中因为墙面反射和外界噪声等存在干扰,从而产生误差. 将计算机图形学中的Phong模型应用到可见光定位的墙面反射模型中,通过计算仿真反射和噪声信号到达接收端的强度,与发射端直射到接收端的信号强度进行对比,发现干扰信号中反射信号的强度与直射强度处于同一个数量级上,因此干扰对于可见光定位系统误差的影响不容忽略. 仿真得到这些干扰对于最终定位系统造成的误差,并且与表示定位性能的克拉美罗下界进行对比,发现最大误差达到1.82 m,平均误差为0.12 m,干扰现象在墙角区域明显.
Abstract:
The visible light indoor positioning system based on received signal strength(RSS)has positioning error due to the disturbance of the wall reflection and the external noise. This system applies Phong in computer graphics to the wall reflection of visible light positioning. Comparing signal strength from LEDs directly with the reflection and noise simulation at the receiving,it is found that signal strength of the wall reflection and direct strength are in the same order of magnitude. Thus the disturbance of the wall reflection and the external noise cannot be ignored. This article compares the simulation error caused by the disturbance to the positioning system with Cramer-Rao bound which represents the lower limit of the positioning error. It is found that maximum error is 1.8 m and the average error is 0.12 m. The disturbance phenomenon is obvious in the corner of the wall.

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备注/Memo

备注/Memo:
收稿日期:2016-12-15.
基金项目:教育部博士点基金(2013102SBJ0265).
通讯联系人:邵建华,教授,研究方向:通信技术. E-mail:shaojianhua@njnu.edu.cn
更新日期/Last Update: 2017-09-30