Relative localization for Mobile Nodes using Visible Light

A growing number of wireless devices and increasing traffic in the radio spectrum has pushed for alternatives to radio based communication. Among these, communication using visible light (VLC) has gained considerable momentum. The imminent adoption of energy efficient Light Emitting Diodes (LEDs) and the high data transmission rates offered by...

Indoor Granular Presence Sensing and Control Messaging with an Ultrasonic Circular Array Sensor

Providing automated granular control of lighting, along with user-driven control, results in an energy-efficient smart lighting system design while catering to personal occupant preferences. Two functional ingredients in such a system are: (i) sensing that provides granular information on occupant location, and (ii) a communication system to...

Implementation of Indoor Localization using Signal of Opportunity on Android™

In this work an implementation of a newly proposed indoor localization algorithm is described. The new algorithm is based on acoustic signals that are readily available in the environment and not intended for this purpose, called "signals of opportunity". The proposed algorithm is intended to be implemented on mobile devices running the Android™...

Finding faulty components in a dynamic distributed system at runtime

This document describes the research performed on fault isolation in dynamic distributed systems at runtime. An existing Spectrum-based Multiple Fault Localization approach is used as the basis for fault isolation, but is adapted and optimized so it can be used for online diagnosis. The result is an algorithm, coined AIMBACH, which finds the...

3D Single Molecule Localization using Micromirrors

Illumination control of an LED lighting system based on localized occupancy

Light emitting diode (LED) based systems are considered to be the future of lighting. We consider the problem of energy-efficient illumination control of such systems. Energy-efficient system design is based on two aspects: localized information of occupancy and optimization of dimming levels of the LEDs. Specifically, we are interested in...

Indoor Localization for Wireless Sensor Networks; Applying multiple frequencies to mitigate multipath effects

Localization has an import role in wireless sensor networks, as it adds context to gathered data. The goal of this thesis is to create an application that determines the location of a mobile sensor node in an indoor environment. A secondary goal is to get practical experience with indoor localization. Previously, in a literature review, we...