Theoretical Limits Analysis of Indoor Positioning System Using Visible Light and Image Sensor

作     者：Zhao, Xiang Lin, Jiming 

作者机构：Xidian Univ Sch Telecommun Engn Xian Peoples R China Guilin Univ Elect Technol Guangxi Key Lab Wireless Wideband Commun & Signal Guilin Guangxi Peoples R China Guilin Univ Elect Technol Guangxi Key Lab Precis Nav Technol & Applicat Guilin Guangxi Peoples R China Guangxi Expt Ctr Informat Sci Guilin Peoples R China Guilin Univ Elect Technol Guangxi Coll & Univ Key Lab Satellite Nav & Posit Guilin Guangxi Peoples R China 

出 版 物：《ETRI JOURNAL》 (ETRI J.)

年 卷 期：2016年第38卷第3期

页      面：560-567页

核心收录：

学科分类：0810[工学-信息与通信工程] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 

基　　金：Natural Science Foundation of China [61261017, 61362006, 61371107] Natural Science Foundation of Guangxi [2014GXNSFAA118387, 2013GXNSFAA019334] Key Lab. Foundation of Guangxi Broadband Wireless Communication & Signal Processing [GXKL061501] Guangxi Colleges and Universities Key Lab. Foundation of Intelligent Processing of Computer Images and Graphics [GIIP201407] New Technology on Wireless Communication in Guangxi Higher Education Institutions 

主　　题：Cramer-Rao bound maximum likelihood estimation indoor positioning systems visible light image sensor location azimuth angle 

摘      要：To solve the problem of parameter optimization in image sensor-based visible light positioning systems, theoretical limits for both the location and the azimuth angle of the image sensor receiver (ISR) are calculated. In the case of a typical indoor scenario, maximum likelihood estimations for both the location and the azimuth angle of the ISR are first deduced. The Cramer-Rao Lower Bound (CRLB) is then derived, under the condition that the observation values of the image points are affected by white Gaussian noise. For typical parameters of LEDs and image sensors, simulation results show that accurate estimates for both the location and azimuth angle can be achieved, with positioning errors usually on the order of centimeters and azimuth angle errors being less than 1 degrees. The estimation accuracy depends on the focal length of the lens and on the pixel size and frame rate of the ISR, as well as on the number of transmitters used.