Design of improved IR protocol for LED indoor positioning system

Popoola, Olaoluwa R. and Popoola, Wasiu O. and Ramirez-Iniguez, Roberto and Sinanović, Sinan; (2017) Design of improved IR protocol for LED indoor positioning system. In: 2017 13th International Wireless Communications and Mobile Computing Conference, IWCMC 2017. IEEE, ESP, pp. 882-887. ISBN 9781509043729

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    In this work, we design an infrared protocol (IRP) for light emitting diode (LED) based indoor positioning. The designed IRP compensates for the shortcomings of other existing protocols when applied to the multiple LED estimation indoor positioning model (MLEM). MLEM uses overlap of LED beams to increase accuracy of positioning. The overlap sets up a multipoint-to-point optical communication channel. The existing protocols which are designed for point-to-point links, when modified to suit the MLEM overlapping region, show a high positioning time between 3 s and 4.5 s. These values are not desirable for real time tracking. A new protocol is therefore designed to reduce the positioning time. The protocol is implemented in an experimental MLEM design using ATmega 328 microcontroller hardware. The experimental results show the new protocol reduces the positioning time to 0.5 s.