Visible light positioning systems (VLPSs) are a feasible alternative to local due the technology improvement and massive use of light-emitting diodes (LEDs). Compared other technologies, VLPSs can provide significant advantages, such as achieved accuracy, although they still present some issues, mainly related reduced coverage area or high computational load. This article proposes design VLPS based on four LED lamps transmitters quadrant photodiode angular diversity aperture (QADA) receiver....

Optical indoor positioning systems have experienced an increasing research interest during the last decade as they can provide 3-D centimeter accuracy using light emitting diode (LED) lighting. In case of having several LEDs simultaneously and a receiver (e.g., tag to be localized), these face important challenges, such very high dynamic ranges with low signal-to-noise ratios when coverage area is increased, multiple access interference (MAI), multipath near-far effects, calibration issues...

Three-dimension infrared positioning systems are a feasible alternative on indoor local systems, where those based photodetectors the most typically used in order not to have complex processing algorithms but fast computation. Optical often characterized by their low cost, lifetime, and easy integration workplace. This work proposes an system four LEDs QADA receiver. By applying encoding techniques transmissions, points of incidence from transmitters receiver simultaneously obtained polar...

The research interest on indoor Location-Based Services (LBS) has increased during the last years, especially using LED lighting, since they can deal with dual functionality of lighting and localization centimetric accuracy. There are several positioning approaches lateration angular methods. These methods typically rely physical model to multipath effect, environmental fluctuations, calibration optical setup, etc. A recent approach is use Machine Learning (ML) techniques. ML techniques...

Nowadays, there is an increasing interest in smart systems, e.g., metering or spaces, for which active sensing plays important role. In such the sample environment to be measured irradiated with a signal (acoustic, infrared, radio-frequency…) and some of their features are determined from transmitted reflected part original signal. this work, infrared (IR) signals emitted different sources (four case) received by unique quadrature angular diversity aperture (QADA) sensor. A code division...

Many indoor positioning applications related to accurate monitoring and tracking targets require centimeter precision. Infrared (IR)- ultrasound (US)-based systems represent a feasible approach providing high robustness against interference. Furthermore, their combination may achieve better performance by mitigating complementary drawbacks, covering larger areas, improving the availability of measurements. In this context, work presents proposal experimental evaluation tightly coupled fusion...

The demand for accurate and reliable local positioning systems has grown rapidly with the increasing use of Location-Based Services (LBS). Emerging technologies such as optical, RF, acoustic, mechanical, magnetic are feasible options indoor positioning. Optical-based have gained attention due to widespread LED lamp availability centimeter-level accuracy. In this context, work presents implementation validation a centralized optical Local Positioning System (LPS) based on set mobile emitter...

The research interest on location-based services has increased during the last years ever since 3D centimetre accuracy inside intelligent environments could be confronted with. This work proposes an indoor local positioning system based LED lighting, transmitted from a set of beacons to receiver.The receiver is quadrant photodiode angular diversity aperture (QADA) plus placed over it.This configuration can modelled as perspective camera, where image position transmitters used recover...

Signal attenuation and multipath effect limit the behaviour of Global Navigation Satellite System (GNSS) in outdoor environments. Thus, there is a current trend on finding centimetric accuracy three-dimension optical indoor positioning system using LEDs photodiodes. There are several works that rely encoding techniques to distinguish between transmitters. Due simultaneous reception, interferences cross-correlation signals may appear (Multiple Access Interference, MAI). In this way,...

The accuracy of optical positioning systems can be compromised by multiple factors (reflections, calibration, etc.). As an alternative to the triangulation, multilateration, or fingerprinting techniques typically used in these systems, stochastic estimation used, such as Kalman Filters (KF) its different variants. They estimate receiver position based on acquired measurements and estimated positions previous iterations. This work presents evaluation a 3D system, four LED beacons quadrant...

Indoor optical positioning systems have increased in popularity recent years because they can provide centimeter accuracy three dimensions (3D) utilizing light-emitting diodes (LEDs) and photoreceptors. This work presents the design of a system, which is based on set four photoreceptors functioning as beacons at known places for single LED to be positioned. However, it might extended additional emitters with some medium access control. The associated processing explained, well basic...

Interest in indoor optical positioning systems has increased over the past decade, as they achieve an accuracy range of centimeters three dimensions (3D) using light emitting diodes (LEDs) and photoreceptors. Due to need a high-rate position updating, these often pose challenges issues when trying real-time prototypes capable processing incoming signals from receivers provide final estimate. In this context, work presents System-on-Chip (SoC) architecture for implementing signal associated...

In the last years, demand for positioning systems based on visible light, infrared light or, in general, optical signals has increased considerably due to their high accuracy and low cost compared other technologies, as well ease of integration wide presence domestic industrial environments. The main constraint these solutions is that speed makes acquisition process complex. This work proposes a complete architecture twelve coming from four QADA (Quadrature Angular Diversity Aperture)...

espanolLos sistemas de posicionamiento local (LPS) basados en luz visible (VLP) son actualmente una alternativa viable, que ha comenzado a expandirse debido su bajo coste, facil integracion el entorno trabajo y ausencia riesgo para la salud. En mayoria los casos, posicion del receptor se obtiene mediante uso fotodetectores tecnicas como triangulacion o multilateracion, con medidas tiempos vuelo, atenuacion senal angulo llegada. este presenta un analisis geometrico sistema donde estudia...