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Localization is a fundamental function in cooperative control of micro unmanned aerial vehicles (UAVs), but is easily affected by flip ambiguities because of measurement errors and flying motions. This study proposes a localization method…

信号处理 · 电气工程与系统科学 2018-09-19 Qingbei Guo , Yuan Zhang , Jaime Lloretz , Burak Kantarcix , Winston K. G. Seah

Machine learning is a promising technique for angle-of-arrival (AOA) estimation of waves impinging a sensor array. However, the majority of the methods proposed so far only consider a known, fixed number of impinging waves, i.e., a fixed…

信号处理 · 电气工程与系统科学 2021-11-19 Noud Kanters , Andrés Alayón Glazunov

Signals of opportunity (SOPs) are a promising technique that can be used for relative positioning in areas where global navigation satellite system (GNSS) information is unreliable or unavailable. This technique processes features of the…

信号处理 · 电气工程与系统科学 2022-08-10 Nicolas Souli , Panayiotis Kolios , Georgios Ellinas

Fast fluid antenna multiple access (FAMA) is an idea that promises to overcome severe interference in massive access scenarios by reconfiguring the antenna's position at the receiver side on a symbol-by-symbol basis, without the need of…

信号处理 · 电气工程与系统科学 2026-05-25 Noor Waqar , Kai-Kit Wong , Chan-Byoung Chae , Ross Murch

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…

分布式、并行与集群计算 · 计算机科学 2023-06-09 Thomas Maul , Sebastian Klob , Joerg Robert

Global Navigation Satellite System (GNSS) receivers provide ubiquitous and precise position, navigation, and time (PNT) to a wide gamut of civilian and tactical infrastructures and devices. Due to the low GNSS received signal power, even…

密码学与安全 · 计算机科学 2024-05-14 Marco Spanghero , Filip Geib , Ronny Panier , Panos Papadimitratos

An interference management problem among multiple overlapped random access networks (RANs) is investigated, each of which operates with slotted ALOHA protocol. Assuming that access points and users have multiple antennas, a novel…

信息论 · 计算机科学 2016-11-17 Hu Jin , Sang-Woon Jeon , Bang Chul Jung

Estimating the direction of arrival (DOA) of sources is an important problem in aerospace and vehicular communication, localization and radar. In this paper, we consider a challenging multi-source DOA estimation task, where the receiving…

信号处理 · 电气工程与系统科学 2022-02-17 Tom Tirer , Oded Bialer

The DOA estimation method of coherent signals based on periodical coding metasurface is proposed. After periodical coding, the DOA information of incident signals in the time domain is represented as the amplitude and phase information at…

信号处理 · 电气工程与系统科学 2023-12-06 Yishuo Zhao , Yan Hu , Yougen Xu

Devices that detect angle-of-arrival (AoA) over a wide field of view are crucial for various applications such as wireless communication and navigation. They are often installed on platforms with challenging mechanical and stealth…

信号处理 · 电气工程与系统科学 2025-07-08 Idban Alamzadeh , Michael Inman , Mohammadreza F. Imani

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…

信息论 · 计算机科学 2025-03-26 Omid Esrafilian , Rakesh Mundlamuri , Florian Kaltenberger , Raymond Knopp , David Gesbert

We consider the problem of estimating the direction of arrival of desired acoustic sources in the presence of multiple acoustic interference sources. All the sources are located in noisy and reverberant environments and are received by a…

信号处理 · 电气工程与系统科学 2024-04-16 Amitay Bar , Ronen Talmon

Long Range (LoRa) has become a key enabler technology for low power wide area networks. However, due to its ALOHA-based medium access scheme, LoRa has to cope with collisions that limit the capacity and network scalability. Collisions…

信号处理 · 电气工程与系统科学 2022-04-15 Qiaohan Zhang , Ivo Bizon , Atul Kumar , Ana Belen Martinez , Marwa Chafii , Gerhard Fettweis

This paper presents a general technique for the joint Direction-of-Arrival (DoA) and Time-of-Arrival (ToA) estimation in multipath environments. The proposed ultra-wideband technique is based on phase-mode expansions and the use of nearly…

信号处理 · 电气工程与系统科学 2023-04-28 Alejandro Ramírez-Arroyo , Antonio Alex-Amor , Pablo Padilla , Juan F. Valenzuela-Valdés

Co-channel interference poses a challenge in any wireless communication network where the time-frequency resources are reused over different geographical areas. The interference is particularly diverse in cell-free massive multiple-input…

信号处理 · 电气工程与系统科学 2024-04-19 Mahmoud Zaher , Emil Björnson , Marina Petrova

In wireless networks, interferences between trans- missions are modelled either in time or frequency domain. In this article, we jointly analyze interferences in the time- frequency domain using a stochastic geometry model assuming the…

网络与互联网体系结构 · 计算机科学 2016-11-15 Zhuocheng Li , Steeve Zozor , Jean-Marc Brossier , Nadège Varsier , Quentin Lampin

Phase wrapping is a major problem in direction-of-arrival (DOA) estimation using phase-difference observations. For a sensor pair with an inter-sensor spacing greater than half of the wavelength ($\lambda/2$) of the signal, phase wrapping…

信号处理 · 电气工程与系统科学 2021-10-22 Hui Chen , Tarig Ballal , Tareq Y. Al-Naffouri

We consider a cellular network, where the uplink transmissions to a base station (BS) are interferenced by other devices, a condition that may occur, e.g., in cell-free networks or when using non-orthogonal multiple access (NOMA)…

信息论 · 计算机科学 2023-05-01 Stefano Tomasin , Raphael Hasler , Antonia M. Tulino , Matilde Sánchez-Fernández

We consider the problem of estimating an RF-device's location based on observations, such as received signal strength, from a set of transmitters with known locations. We survey the literature on this problem, showing that previous authors…

网络与互联网体系结构 · 计算机科学 2017-03-09 Nachikethas A. Jagadeesan , Bhaskar Krishnamachari

Interference Alignment (IA) is the process of designing signals in such a way that they cast overlapping shadows at their unintended receivers, while remaining distinguishable at the intended ones. Our goal in this paper is to come up with…

信息论 · 计算机科学 2016-11-15 Hadi G. Ghauch , Constantinos B. Papadias