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Localization is a fundamental enabler technology for many applications, like vehicular networks, IoT, and even medicine. While Global Navigation Satellite Systems solutions offer great performance, they are unavailable in scenarios like…

Optimization and Control · Mathematics 2024-04-03 Filipa Valdeira , Cláudia Soares , João Gomes

Time-of-arrival (TOA)-based localization in mixed line-of-sight (LOS) and non-line-of-sight (NLOS) environments is challenging because conventional Euclidean range models do not capture diffraction-dominated propagation. We show that the…

Signal Processing · Electrical Eng. & Systems 2026-04-30 Gaurav Duggal , Richard M. Buehrer , Harpreet S. Dhillon , Jeffrey H. Reed

In a time division broadcast positioning system (TDBPS), a user device (UD) determines its position by obtaining sequential time-of-arrival (TOA) or pseudorange measurements from signals broadcast by multiple synchronized base stations…

Signal Processing · Electrical Eng. & Systems 2021-02-03 Sihao Zhao , Xiao-Ping Zhang , Xiaowei Cui , Mingquan Lu

A distributed antenna system is studied whose goal is to provide data communication and positioning functionalities to Mobile Stations (MSs). Each MS receives data from a number of Base Stations (BSs), and uses the received signal not only…

Information Theory · Computer Science 2014-04-30 Seongah Jeong , Osvaldo Simeone , Alexander Haimovich , Joonhyuk Kang

We study the important problem of tracking moving targets in wireless sensor networks. We try to overcome the limitations of standard state of the art tracking methods based on continuous location tracking, i.e. the high energy dissipation…

Distributed, Parallel, and Cluster Computing · Computer Science 2008-03-17 Andrei Marculescu , Sotiris Nikoletseas , Olivier Powell , Jose Rolim

This article considers the problem of source localization (SL) using possibly unreliable time-of-arrival (TOA) based range measurements. Adopting the strategy of statistical robustification, we formulate TOA SL as minimization of a…

Signal Processing · Electrical Eng. & Systems 2024-01-18 Wenxin Xiong , Christian Schindelhauer , Hing Cheung So

The direction of arrival (DOA) estimation algorithms are crucial in localizing acoustic sources. Traditional localization methods rely on block-level processing to extract the directional information from multiple measurements processed…

Audio and Speech Processing · Electrical Eng. & Systems 2023-08-15 Ruchi Pandey , Santosh Nannuru

Precise localization is one key element of the Internet of Things (IoT). Especially concepts for position estimation when Global Navigation Satellite Systems (GNSS) are unavailable have moved into the focus. One crucial component for…

Distributed, Parallel, and Cluster Computing · Computer Science 2023-06-09 Thomas Maul , Sebastian Klob , Joerg Robert

Precise Time-of-Arrival (TOA) estimations of aircraft and drone signals are important for a wide set of applications including aircraft/drone tracking, air traffic data verification, or self-localization. Our focus in this work is on TOA…

Signal Processing · Electrical Eng. & Systems 2018-02-21 Roberto Calvo-Palomino , Fabio Ricciato , Blaz Repas , Domenico Giustiniano , Vincent Lenders

We consider a network of agents that locate themselves in an environment through sensor measurements and aim to transmit a message signal to a base station via collaborative beamforming. The agents' sensor measurements result in…

Signal Processing · Electrical Eng. & Systems 2021-03-19 Erfaun Noorani , Yagiz Savas , Alec Koppel , John Baras , Ufuk Topcu , Brian M. Sadler

This paper considers the challenge of localizing ground users with the help of a radio-equipped unmanned aerial vehicle (UAV) that collects measurements from users. We utilize time-of-arrival (ToA) measurements estimated from the radio…

Information Theory · Computer Science 2025-03-26 Omid Esrafilian , Rakesh Mundlamuri , Florian Kaltenberger , Raymond Knopp , David Gesbert

The paper analyzes energy allocation in a scenario where the position of a moving target is tracked by exploiting the Time-of-Arrivals of bandwidth-constrained signals received by or transmitted from a fixed number of anchors located at…

Signal Processing · Electrical Eng. & Systems 2025-12-23 Luca Reggiani , Arnaldo Spalvieri

In this paper, we propose a novel time of arrival (TOA) estimator for multiple-input-multiple-output (MIMO) backscatter channels in closed form. The proposed estimator refines the estimation precision from the topological structure of the…

Information Theory · Computer Science 2023-11-23 Chen He , Luyang Han , Z. Jane Wang

We investigate the problem of optimally observing a finite set of targets using a mobile agent over an infinite time horizon. The agent is tasked to move in a network-constrained structure to gather information so as to minimize the…

Systems and Control · Electrical Eng. & Systems 2022-01-19 Samuel C. Pinto , Shirantha Welikala , Sean B. Andersson , Julien M. Hendrickx , Christos G. Cassandras

We consider the problem of dynamically allocating tasks to multiple agents under time window constraints and task completion uncertainty. Our objective is to minimize the number of unsuccessful tasks at the end of the operation horizon. We…

Robotics · Computer Science 2020-07-28 Shushman Choudhury , Jayesh K. Gupta , Mykel J. Kochenderfer , Dorsa Sadigh , Jeannette Bohg

We consider the problem of localizing a target taking the help of a set of anchor beacon nodes.A small number of beacon nodes are deployed at known locations in the area.The target can detect a beacon provided it happens to lie within the…

Networking and Internet Architecture · Computer Science 2015-07-20 S. N. Bharadwaj , S. N. Jagadeesha , S. Ravindra

The accuracy of time difference of arrival (TDOA)-based source localization is influenced by sensor location deployment. Many studies focus on optimal sensor placement (OSP) for TDOA-based localization without sensor location noises…

Signal Processing · Electrical Eng. & Systems 2024-10-29 Chengjie Zhang , Xinyang Han

We address the problem of localising a mobile terminal ("blind" node) in unknown position from a set of "anchor" nodes in known positions. The proposed method does not require any form of node synchronisation nor measurement (or control) of…

Networking and Internet Architecture · Computer Science 2015-07-15 Nicolo' Facchi , Francesco Gringoli , Fabio Ricciato , Andrea Toma

This paper studies the optimal placement of ceiling-mounted metasurfaces (MTSs) to help focus the wireless signal beam onto the target receiver, as inspired by the theatre spotlight. We assume that a total of $M$ MTSs are deployed, and that…

Information Theory · Computer Science 2026-03-03 Wenhai Lai , Kaiming Shen , Rui Zhang

This paper addresses the problem of both actively searching and tracking multiple unknown dynamic objects in a known environment with multiple cooperative autonomous agents with partial observability. The tracking of a target ends when the…

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