Development of an optical signal-based IPS from an MCU-SoC
AuthorsRubiano Muriel, Borja; Lázaro Galilea, José Luis; Gardel Vicente, Alfredo; Llana Calvo, Álvaro de la; Bravo Muñoz, Ignacio
IdentifiersPermanent link (URI): http://hdl.handle.net/10017/43244
Agencia Estatal de Investigación
Rubiano Muriel, B., Lázaro Galilea, J.L., Gardel Vicente, A., Llana Calvo, A. de la & Bravo Muñoz, I. 2020, "Development of an optical signal-based IPS from an MCU-SoC", Electronics (2020), vol. 9, no. 5, art. no. 782, pp. 1-20.
Visible Light Positioning (VLP)
Signal processing in MCU
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/TEC2017-90808-REDT/ES/RED DE EXCELENCIA SOBRE POSICIONAMIENTO Y NAVEGACION EN INTERIORES Y EXTERIORES DELIMITADOS/REPNIN+
Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
In this work, we have studied the integration of an optical signal-based Indoor Positioning System (IPS) capable of supporting multi-access discrimination techniques. The research analyzes the different techniques and conditions that can be used to develop an IPS using a microcontroller unit (MCU)-based system-on-chip (SoC) systems. The main goal is to be able to integrate into the MCU both the hardware and software requirements for an IPS detector. In this way, different strategies that can implement multi-access discrimination using Frequency-division multiple access (FDMA) have been tested, such as I/Q demodulation, digital filtering, and discrete Fourier transform (DFT). This analysis has found a good technique to be executed in an MCU-based SoC, the DFT implemented through the Goertzel's algorithm. The empirical tests carried out concluded that, usingonly one an MCU with the required HW and tuned SW, 15 position measurements per second werecomputed, with high accuracy in the 3-D positioning, with errors of less than 1 cm in a test area of 3.5 x 3.5 m2. The main contribution of the paper is the implementation of the optical signal based IPS in an MCU-SoC that includes signal acquisition and processing. The digital filtering or spectral processing for up to 16 received signals makes this IPS system very attractive from a design and costpoint of view.