559 citations · 1.9k across the 45 of their papers we have counts for
50 papers
Joint 3D User and 6D Hybrid Reconfigurable Intelligent Surface Localization
Reza Ghazalian, George C. Alexandropoulos, Gonzalo Seco-Granados +2
The latest assessments of the emerging technologies for reconfigurable intelligent surfaces (RISs) have indicated the concept's significant potential for localization and sensing,…
RIS Position and Orientation Estimation via Multi-Carrier Transmissions and Multiple Receivers
Reza Ghazalian, Hui Chen, George C. Alexandropoulos +3
Reconfigurable intelligent surfaces (RISs) are considered as an enabling technology for the upcoming sixth generation of wireless systems, exhibiting significant potential for radi…
Fundamental Performance Bounds for Carrier Phase Positioning in Cellular Networks
Henk Wymeersch, Rouhollah Amiri, Gonzalo Seco-Granados
The carrier phase of cellular signals can be utilized for highly accurate positioning, with the potential for orders-of-magnitude performance improvements compared to standard time…
Uplink Joint Positioning and Synchronization in Cell-Free Deployments with Radio Stripes
Alessio Fascista, Benjamin J. B. Deutschmann, Musa Furkan Keskin +6
Radio stripes (RSs) is an emerging technology in beyond 5G and 6G wireless networks to support the deployment of cell-free architectures. In this paper, we investigate the potentia…
ESPRIT-Oriented Precoder Design for mmWave Channel Estimation
Musa Furkan Keskin, Alessio Fascista, Fan Jiang +3
We consider the problem of ESPRIT-oriented precoder design for beamspace angle-of-departure (AoD) estimation in downlink mmWave multiple-input single-output communications. Standar…
RISs and Sidelink Communications in Smart Cities: The Key to Seamless Localization and Sensing
Hui Chen, Hyowon Kim, Mustafa Ammous +4
A smart city involves, among other elements, intelligent transportation, crowd monitoring, and digital twins, each of which requires information exchange via wireless communication…
RIS-Aided Monostatic Sensing and Object Detection with Single and Double Bounce Multipath
Hyowon Kim, Alessio Fascista, Hui Chen +4
We propose a framework for monostatic sensing by a user equipment (UE), aided by a reconfigurable intelligent surface (RIS) in environments with single- and double-bounce signal pr…
RIS-Enabled SISO Localization under User Mobility and Spatial-Wideband Effects
Kamran Keykhosravi, Musa Furkan Keskin, Gonzalo Seco-Granados +2
Reconfigurable intelligent surface (RIS) is a promising technological enabler for the 6th generation (6G) of wireless systems with applications in localization and communication. I…
Bayesian Integrity Monitoring for Cellular Positioning -- A Simplified Case Study
Liqin Ding, Gonzalo Seco-Granados, Hyowon Kim +4
Bayesian receiver autonomous integrity monitoring (RAIM) algorithms are developed for the snapshot cellular positioning problem in a simplified one-dimensional (1D) linear Gaussian…
Joint User Localization and Location Calibration of A Hybrid Reconfigurable Intelligent Surface
Reza Ghazalian, Hui Chen, George C. Alexandropoulos +3
The recent research in the emerging technology of reconfigurable intelligent surfaces (RISs) has identified its high potential for localization and sensing. However, to accurately…
Radio Localization and Sensing -- Part I: Fundamentals
Henk Wymeersch, Gonzalo Seco-Granados
This letter is part of a two-letter tutorial on radio localization and sensing, with focus on mobile radio systems in 5G mmWave and beyond. Part I introduces the fundamentals, cove…
Radio Localization and Sensing -- Part II: State-of-the-art and Challenges
Henk Wymeersch, Gonzalo Seco-Granados
This letter is part of a two-letter tutorial on radio localization and sensing, with a focus on mobile radio systems, i.e., 5G and beyond. Building on Part I, which focused on the…
Cramér-Rao Bound Analysis of Radars for Extended Vehicular Targets with Known and Unknown Shape
Nil Garcia, Alessio Fascista, Angelo Coluccia +4
Due to their shorter operating range and large bandwidth, automotive radars can resolve many reflections from their targets of interest, mainly vehicles. This calls for the use of…
RIS-aided Joint Localization and Synchronization with a Single-Antenna Receiver: Beamforming Design and Low-Complexity Estimation
Alessio Fascista, Musa Furkan Keskin, Angelo Coluccia +2
Reconfigurable intelligent surfaces (RISs) have attracted enormous interest thanks to their ability to overcome line-of-sight blockages in mmWave systems, enabling in turn accurate…
Semi-Assisted Signal Authentication based on Galileo ACAS
Ignacio Fernandez-Hernandez, Simon Cancela, Rafael Terris-Gallego +9
A GNSS signal authentication concept named semi-assisted authentication is proposed. It is based on the re-encryption and publication of keystream sequences of some milliseconds fr…
MmWave 6D Radio Localization with a Snapshot Observation from a Single BS
Mohammad A. Nazari, Gonzalo Seco-Granados, Pontus Johannisson +1
Accurate and ubiquitous localization is crucial for a variety of applications such as logistics, navigation, intelligent transport, monitoring, control, and also for the benefit of…
Robust Beamforming for Localization-Aided Millimeter Wave Communication Systems
Junchang Sun, Shuai Ma, Shiyin Li +3
In this letter, we investigate a robust beamforming problem for localization-aided millimeter wave (mmWave) communication systems. To handle this problem, we propose a novel restri…
RIS-Enabled Self-Localization: Leveraging Controllable Reflections With Zero Access Points
Kamran Keykhosravi, Gonzalo Seco-Granados, George C. Alexandropoulos +1
Reconfigurable intelligent surfaces (RISs) are one of the most promising technological enablers of the next (6th) generation of wireless systems. In this paper, we introduce a nove…
Location-Based Timing Advance Estimation for 5G Integrated LEO Satellite Communications
Wenjin Wang, Tingting Chen, Rui Ding +3
Integrated satellite-terrestrial communications networks aim to exploit both the satellite and the ground mobile communications, thus providing genuine ubiquitous coverage. For 5G…
Optimal Spatial Signal Design for mmWave Positioning under Imperfect Synchronization
Musa Furkan Keskin, Fan Jiang, Florent Munier +2
We consider the problem of spatial signal design for multipath-assisted mmWave positioning under limited prior knowledge on the user's location and clock bias. We propose an optima…
Semi-Passive 3D Positioning of Multiple RIS-Enabled Users
Kamran Keykhosravi, Musa Furkan Keskin, Satyam Dwivedi +2
Reconfigurable intelligent surfaces (RISs) are set to be a revolutionary technology in the 6th generation of wireless systems. In this work, we study the application of RIS in a mu…
3D Orientation Estimation with Multiple 5G mmWave Base Stations
Mohammad A. Nazari, Gonzalo Seco-Granados, Pontus Johannisson +1
We consider the problem of estimating the 3D orientation of a user, using the downlink mmWave signals received from multiple base stations. We show that the received signals from s…
Position Information from Single-Bounce Reflections
Anastasios Kakkavas, Mario H. Castañeda García, Gonzalo Seco-Granados +3
In the context of positioning a target with a single-anchor, this contribution focuses on the Fisher information about the position, orientation and clock offset of the target prov…
Power Allocation and Parameter Estimation for Multipath-based 5G Positioning
Anastasios Kakkavas, Henk Wymeersch, Gonzalo Seco-Granados +3
We consider a single-anchor multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) system with imperfectly synchronized transmitter (Tx) and receiv…