Open AccessExploring the effect of diffuse reflection on indoor localization systems based on RSSI-VLC
Author(s) -
Nazmi A. Mohammed,
Mohammed Abd Elkarim
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.020297
Subject(s) - visible light communication , transmitter , optics , multipath propagation , reflection (computer programming) , reflectivity , diffuse reflection , power (physics) , computer science , ray tracing (physics) , position (finance) , materials science , physics , optoelectronics , light emitting diode , telecommunications , channel (broadcasting) , finance , quantum mechanics , economics , programming language
This work explores and evaluates the effect of diffuse light reflection on the accuracy of indoor localization systems based on visible light communication (VLC) in a high reflectivity environment using a received signal strength indication (RSSI) technique. The effect of the essential receiver (Rx) and transmitter (Tx) parameters on the localization error with different transmitted LED power and wall reflectivity factors is investigated at the worst Rx coordinates for a directed/overall link. Since this work assumes harsh operating conditions (i.e., a multipath model, high reflectivity surfaces, worst Rx position), an error of ≥ 1.46 m is found. To achieve a localization error in the range of 30 cm under these conditions with moderate LED power (i.e., P = 0.45 W), low reflectivity walls (i.e., ρ = 0.1) should be used, which would enable a localization error of approximately 7 mm at the room's center.