Optimization of duty cycles for LED based indoor positioning system

Olaoluwa R. Popoola, Waisu O. Popoola, Roberto Ramirez-Iniguez, Sinan Sinanovic

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    64 Downloads (Pure)

    Abstract

    In this paper, an optimal duty cycle, which increases packet delivery ratio (PDR) and reduces probability of collision is designed for packet transmission in an indoor positioning system based on a multiple LED estimation model (MLEM). MLEM improves positioning accuracy by identifying positions of overlap regions where light footprints from multiple LEDs. In MLEM, asynchronous LED transmitters send positional information at the same frequency, amplitude, and wavelength. Consequently, in an LED overlap region, transmitted packets collide and therefore are lost. Methods to avoid packet collision in this region are considered and based on keeping the hardware simple, packet-based pulse duration multiplexing is optimized to provide a time based pseudo-orthogonality between packets. Initial experiments showed a PDR of 0.5 in the overlap region. However, by defining the boundary conditions for non-persistent packet collisions, an exhaustive search for the optimal packet transmission configuration is carried out in this work. Results show that the optimum points occur at 0.09 and 0.1 duty cycles. The use of this optimal duty cycles improved PDR to 0.9 for transmission in the overlap region.
    Original languageEnglish
    Title of host publicationInternational Conference for Students on Applied Engineering (ICSAE)
    PublisherIEEE
    ISBN (Electronic)978-1-4673-9053-8
    DOIs
    Publication statusPublished - Jan 2017

    Fingerprint

    Light emitting diodes
    Multiplexing
    Indoor positioning systems
    Transmitters
    Boundary conditions
    Hardware
    Wavelength
    Experiments

    Keywords

    • duty cycles
    • LEDs
    • indoor positioning system

    Cite this

    Popoola, O. R., Popoola, W. O., Ramirez-Iniguez, R., & Sinanovic, S. (2017). Optimization of duty cycles for LED based indoor positioning system. In International Conference for Students on Applied Engineering (ICSAE) IEEE. https://doi.org/10.1109/ICSAE.2016.7810219
    Popoola, Olaoluwa R. ; Popoola, Waisu O. ; Ramirez-Iniguez, Roberto ; Sinanovic, Sinan. / Optimization of duty cycles for LED based indoor positioning system. International Conference for Students on Applied Engineering (ICSAE). IEEE, 2017.
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    title = "Optimization of duty cycles for LED based indoor positioning system",
    abstract = "In this paper, an optimal duty cycle, which increases packet delivery ratio (PDR) and reduces probability of collision is designed for packet transmission in an indoor positioning system based on a multiple LED estimation model (MLEM). MLEM improves positioning accuracy by identifying positions of overlap regions where light footprints from multiple LEDs. In MLEM, asynchronous LED transmitters send positional information at the same frequency, amplitude, and wavelength. Consequently, in an LED overlap region, transmitted packets collide and therefore are lost. Methods to avoid packet collision in this region are considered and based on keeping the hardware simple, packet-based pulse duration multiplexing is optimized to provide a time based pseudo-orthogonality between packets. Initial experiments showed a PDR of 0.5 in the overlap region. However, by defining the boundary conditions for non-persistent packet collisions, an exhaustive search for the optimal packet transmission configuration is carried out in this work. Results show that the optimum points occur at 0.09 and 0.1 duty cycles. The use of this optimal duty cycles improved PDR to 0.9 for transmission in the overlap region.",
    keywords = "duty cycles, LEDs, indoor positioning system",
    author = "Popoola, {Olaoluwa R.} and Popoola, {Waisu O.} and Roberto Ramirez-Iniguez and Sinan Sinanovic",
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    Popoola, OR, Popoola, WO, Ramirez-Iniguez, R & Sinanovic, S 2017, Optimization of duty cycles for LED based indoor positioning system. in International Conference for Students on Applied Engineering (ICSAE). IEEE. https://doi.org/10.1109/ICSAE.2016.7810219

    Optimization of duty cycles for LED based indoor positioning system. / Popoola, Olaoluwa R.; Popoola, Waisu O.; Ramirez-Iniguez, Roberto; Sinanovic, Sinan.

    International Conference for Students on Applied Engineering (ICSAE). IEEE, 2017.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

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    AB - In this paper, an optimal duty cycle, which increases packet delivery ratio (PDR) and reduces probability of collision is designed for packet transmission in an indoor positioning system based on a multiple LED estimation model (MLEM). MLEM improves positioning accuracy by identifying positions of overlap regions where light footprints from multiple LEDs. In MLEM, asynchronous LED transmitters send positional information at the same frequency, amplitude, and wavelength. Consequently, in an LED overlap region, transmitted packets collide and therefore are lost. Methods to avoid packet collision in this region are considered and based on keeping the hardware simple, packet-based pulse duration multiplexing is optimized to provide a time based pseudo-orthogonality between packets. Initial experiments showed a PDR of 0.5 in the overlap region. However, by defining the boundary conditions for non-persistent packet collisions, an exhaustive search for the optimal packet transmission configuration is carried out in this work. Results show that the optimum points occur at 0.09 and 0.1 duty cycles. The use of this optimal duty cycles improved PDR to 0.9 for transmission in the overlap region.

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    Popoola OR, Popoola WO, Ramirez-Iniguez R, Sinanovic S. Optimization of duty cycles for LED based indoor positioning system. In International Conference for Students on Applied Engineering (ICSAE). IEEE. 2017 https://doi.org/10.1109/ICSAE.2016.7810219