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A fingerprinting‐based indoor localization system using intensity modulation of light emitting diodes
Author(s) -
Vongkulbhisal Jayakorn,
Chantaramolee Bhume,
Zhao Yan,
Mohammed Waleed S.
Publication year - 2012
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.26763
Subject(s) - transmitter , light emitting diode , signal (programming language) , microwave , diode , modulation (music) , fingerprint (computing) , optical power , spectral density , power (physics) , computer science , electronic engineering , optics , optoelectronics , physics , acoustics , engineering , telecommunications , laser , artificial intelligence , channel (broadcasting) , programming language , quantum mechanics
Abstract In this article, we propose a two‐dimensional indoor localization system using fingerprinting of received optical signals emitted from light emitting diodes (LEDs).The transmitters and receiver are designed and constructed to use visible light as the signal for localization. At the transmitter side, the input voltage/current is modulated with continuous waves before being sent to the LEDs, where each transmitter is assigned with a different frequency. At the receiver side, the power spectral density of the received signal is calculated and the location is estimated as one of the fingerprint locations using a novel but yet simple algorithm. Both the simulation and experiment have been conducted to evaluate the accuracy of the system in a controlled environment. We demonstrate that the system has the potential to estimate locations in the level of centimeters. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:1218–1227, 2012