This paper presents a hardware implementation of a sound localization algorithm that localizes a single sound source by using the information gathered by two separated microphones. This is achieved through estimating the time delay of arrival (TDOA) of sound at the two microphones. We have used a TDOA algorithm known as the “phase transform” to minimize the effects of reverberations and noise f...

In this paper we study the suitability and performance of conventional time delay of arrival estimation for humanoid robots. Moving away from simulated environments, we look at the influence of real-world robot's shape on the sound source localization. We present a TDOA/GCC based sound source localization method that successfully addresses this influence by utilizing a pre-measured set of TDOAs...

Accurate indoor localization is a crucial enabling technology for many robotics applications, from warehouse management to monitoring tasks. Ultra-wideband (UWB) time difference of arrival (TDOA)-based promising lightweight, low-cost solution that can scale large number devices-making it especially suited resource-constrained multi-robot applications. However, the accuracy standard, commerciall...

As the importance of GNSS to civilian infrastructure increases, the ability to detect and localise sources of interference that disrupts its operation becomes increasingly important. In order to calculate the time-delay measurements in a Time Difference Of Arrival (TDOA) based localisation system for localising interference to GPS within the GNSS Environmental Monitoring System (GEMS), data col...

In this paper the performance of GPS timing under jamming conditions is evaluated in the context of a GPS jammer localization system that uses the TimeDifference-Of-Arrival (TDOA) technique. To investigate the performance of GPS timing receivers under jamming conditions, jammer signals of different types and powers were combined with real GPS signals and input into two timing receivers and the ...

In the visible light positioning (VLP) system, received signal strength (RSS) algorithm has a better noise ratio performance than time difference of arrival (TDOA) algorithm, while RSS needs to work under condition that transmitter and receiver are strictly parallel. However, is prone tilt due environmental disturbances, which reduces accuracy algorithm. For tilted receiver, TDOA higher order t...

This paper presents a positioning algorithm, named time of arrival to time difference of arrival (TOAD), which computes timedifference-of-arrival (TDOA) measurements from the messages that time-of-arrival (TOA) stations in sight exchange while their positioning processes are running. This study addresses the accuracy of the TOAD algorithm in two different environments: lineof-sight (LOS) and no...

Acoustic emission (AE) source localization has been used to visualize progress failures generated in a wide variety of materials. In the conventional approaches, AE algorithms assume that signal is propagated as straight line. However, it supposed form heterogeneity elastic wave velocity distributions. Hence, with localization, expected accuracy reduced heterogeneous materials since diffraction...

Due to their low-power levels, GPS signals are very susceptible to interference from either intentional or unintentional sources. This vulnerability is further aggravated by the increased reliance of the civilian infrastructure on GPS for time synchronization. This brings about the pressing need for detection and localisation of the interferers in real-time to prevent disturbance to everyday op...

We propose a realistic 3D positioning system for indoor navigation that exploits visible Light Emitting Diodes (LEDs), placed on the ceiling. A unique frequency tone is assigned to each lamp and modulates its intensity in periodic time slots. The Time Difference of Arrival (TDOA) measured without need synchronization between sources receiver, then it used accurately estimate receiver position. ...