This paper describes the development and implementation of a robust high-accuracy
ultrasonic indoor positioning system (UIPS). The UIPS consists of several wireless ultrasonic …

This paper presents the state-of-the-art and reviews the state-of-research of acoustic
sensors used for a variety of navigation and guidance applications on air and surface …

Indoor localization technologies hold promise for many ambient intelligence applications,
including in-situ navigational assistance for individuals with wayfinding difficulties. Given …

Positioning systems have become increasingly popular in the last decade for location-based
services, such as navigation, and asset tracking and management. As opposed to outdoor …

Acoustic local positioning systems (ALPSs) are an interesting alternative for indoor
positioning due to certain advantages over other approaches, including their relatively high …

This paper presents a novel reference-free ultrasonic indoor location system. Unlike most
previous proposals, the mobile device (MD) determines its own position based only on …

The aim of this work was to position a Mobile Robot in an Intelligent Space, and this paper
presents a sensorial system for measuring differential phase-shifts in a sinusoidally …

This paper proposes a novel 3D sensor node to establish relative measurements within a
robot network. The developed sensor nodes employ ultrasonic-based range measurement …

The growing interest for indoor position-based applications and services, as well as
ubiquitous computing and location aware information, have led to increasing efforts toward …

This paper presents an acoustic local positioning system (ALPS) suitable for indoor
positioning of portable devices such as smartphones or tablets, based on the transmission of …