In a visible light positioning (VLP) system, a receiver can estimate its location based on signals transmitted by light emitting diodes (LEDs). In this manuscript, we investigate a quasi-synchronous VLP system, in which the LED transmitters are synchronous among themselves but are not synchronized with the receiver. In quasisynchronous VLP systems, position estimation can be performed by utiliz...

Low-complexity least-squares (LS) estimators based on time-of-arrival (TOA) or time-difference-of-arrival (TDOA) measurements have been developed to locate a target node with the help of anchors (nodes with known positions). They require to select a reference anchor in order to cancel nuisance parameters or relax stringent synchronization requirements. Thus, their localization performance relie...

This paper presents a wideband jamming emitter localization method based on the fusion of multiple direction-ofarrivals (DOAs) and time-difference-of-arrival(s) (TDOA(s)) obtained from multiple unmanned-aerial-vehicles (UAVs). In this technique, we assume that multiple trajectory controllable UAVs are available and they are equipped with smart antennas to estimate the emitter’s angle (DOA) with...

In this work we present improvements in our research on position and orientation estimation of an acoustic source by a microphone array network. Here, at the input of an artificial neural network (ANN), combinations of energy related features, time delay of arrival (TDOA) of microphone pairs, and source position candidates derived for every array of the array network are directly used in a mapp...

We present the design of a remotely deployable distributed wireless antenna system formed from wireless sensor network nodes. Specifically, the focus is on enhancing the detection range of a distributed wireless antenna system. The primary objective is to create a methodology to steer the beam in the desired direction to enhance radio frequency (RF) direction finding and follow-on signal recept...

Time Difference Of Arrival (TDOA) estimates can be used for passive acoustic multiple sound source localization with microphone arrays. The TDOA estimation is based on the cross-correlation function of two signals of a microphone pair. Existing systems assume only one dominant sound source per analysis frame rejecting the localization information of other active sources present in the acoustic ...

This paper proposes an original Three-Dimensional (3-D) positioning technique based on an enhanced Chan method by investigating the performance of position estimation method by Time Difference Of Arrival (TDOA). The studied configurations assume that each mobile locates itself and so it receives and analyses signal from multiple transmitters, namely Base Station (BS). The approach is non-iterat...

In this paper, we consider real-time tracking of an Autonomous Guided Vehicle (AGV) in an indoor industrial scenario. An on-board odometer provides information about the dynamic state of the AGV, allowing to predict its pose (position and orientation). At the same time, an external Ultra Wide Band (UWB) wireless network provides the information necessary to compensate the error drift accumulate...

We present an energy-efficient wireless sensor network (WSN) architecture tailored for illegal deforestation detection. Illegal deforestation is a world-wide problem which may be prevented through improved monitoring of forested areas utilizing sensor networks equipped with chain-saw detection. Additional to detection, we identify sound source localization and sensor node localization as essent...

The curse of outlier measurements in estimation problems is a well known issue in a variety of fields. Therefore, outlier removal procedures, which enables the identification of spurious measurements within a set, have been developed for many different scenarios and applications. In this paper, we propose a statistically motivated outlier removal algorithm for time differences of arrival (TDOAs...