A5030962220- Indoor and Outdoor Localization Technologies
- Ultra-Wideband Communications Technology
- Millimeter-Wave Propagation and Modeling
- Advanced Wireless Communication Technologies
- French Historical and Cultural Studies
- Wireless Body Area Networks
- Antenna Design and Analysis
- Vehicular Ad Hoc Networks (VANETs)
- Historical Studies and Socio-cultural Analysis
- Historical and Literary Analyses
- Underwater Vehicles and Communication Systems
- French Literature and Criticism
- French Literature and Critical Theory
- Advanced MIMO Systems Optimization
- French Urban and Social Studies
- Microwave Imaging and Scattering Analysis
- Historical and Literary Studies
- Cultural Insights and Digital Impacts
- Linguistics and Discourse Analysis
- GNSS positioning and interference
- Literature and Culture Studies
- Target Tracking and Data Fusion in Sensor Networks
- Energy Efficient Wireless Sensor Networks
- Bluetooth and Wireless Communication Technologies
- Wireless Networks and Protocols
CEA LETI
2016-2025
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2016-2025
Université Grenoble Alpes
2015-2024
CEA Grenoble
2015-2024
Institut polytechnique de Grenoble
2014-2023
CEA Paris-Saclay
2021
CEA Paris-Saclay - Etablissement de Saclay
2021
Institut National des Sciences Appliquées de Rennes
2020
Campus France
2017-2019
Constructor University
2018
5G radio for millimeter-wave (mm-wave) and beyond5G concepts at 0.1-1 THz can exploit angle delay measurements localization through an increased bandwidth large antenna arrays, but they are limited in terms of blockage caused by obstacles. Reconfigurable intelligent surfaces (RISs) seen as a transformative technology that control the physical propagation environment which embedded passively reflecting waves preferred directions actively sensing this receive transmit modes. While such RISs...
Various visions of the forthcoming sixth generation (6G) networks point toward flexible connect-and-compute technologies to support future innovative services and corresponding use cases. 6G should be able accommodate ever evolving heterogeneous applications, regulations, diverse user-, service-, location-based requirements. A key element building smart energy sustainable wireless systems beyond 5G is reconfigurable intelligent surface (RIS), which offers programmable control shaping...
The design of 6th Generation (6G) wireless networks points towards flexible connect-and-compute technologies capable to support innovative services and use cases. Targeting the 2030 horizon, 6G are poised pave way for sustainable human-centered smart societies vertical industries, such that will be transformed into a distributed connectivity infrastructure, where new terminal types embedded in daily environment. In this context, RISE-6G project aims at investigating solutions capitalize on...
In this paper, we describe a global distributed solution that enables the simultaneous performance of time synchronization and positioning in ultra-wideband (UWB) ad hoc networks. On one hand, proposed scheme basically relies on cooperative two-way-ranging/time-of-arrival transactions diffusion algorithm ensures convergence clock parameters to average reference values each node. Although described is generic at first sight, its sensitivity time-of-arrival accuracy imposes choice an...
Absolute positioning of vehicles is based on Global Navigation Satellite Systems (GNSSs) combined with on-board sensors and high-resolution maps. In cooperative intelligent transportation systems, the performance can be augmented by means vehicular networks that enable to share location-related information. This paper presents an implicit (ICP) algorithm exploits Vehicle-to-Vehicle (V2V) connectivity in innovative manner, avoiding use explicit V2V measurements such as ranging. ICP approach,...
5G radio positioning exploits information in both angle and delay, by virtue of increased bandwidth large antenna arrays. When arrays are embedded surfaces, they can passively steer electromagnetic waves preferred directions space. Reconfigurable intelligent surfaces (RIS), which seen as a transformative "beyond 5G" technology, thus control the physical propagation environment. Whereas such RIS have been mainly intended for communication purposes so far, we herein state analyze RIS-aided...
Reconfigurable intelligent surfaces (RISs) have tremendous potential for both communication and localization. While benefits are now well-understood, the breakthrough nature of technology may well lie in its capability to provide location estimates when conventional approaches fail, (e.g., due insufficient available infrastructure). A limited number example scenarios been identified, but an overview possible RIS-enabled localization is still missing from literature. In this article, we...
Abstract Reconfigurable intelligent surfaces (RISs) constitute the key enabler for programmable electromagnetic propagation environments and are lately being considered as a candidate physical-layer technology demanding connectivity, reliability, localisation, sustainability requirements of next-generation wireless networks. In this paper, we first present deployment scenarios RIS-enabled smart that have been recently designed within ongoing European Union Horizon 2020 RISE-6G project, well...
The ultra wideband (UWB) radiolocation functionality usually relies on the ability to perform a very precise estimation of time flight (TOF). Unfortunately, in spite fine performances demonstrated by UWB systems, indoor dense multipath channels may alter precision range estimate from severe blockage situations. This paper addresses general problem non line sight (NLOS) errors specific context estimation. Typical ranging due NLOS propagation are exhibited deriving experimental results real...
Reconfigurable intelligent surfaces (RISs) have the potential to enable user localization in scenarios where traditional approaches fail. Building on prior work single-antenna RIS-enabled localization, we investigate exploit wavefront curvature geometric near-field conditions. Via a Fisher information analysis, demonstrate that while improves accuracy mostly at short distances when line-of-sight (LoS) path is present, it could still provide reasonable performance this blocked by relying...
This paper presents an analytical comparison of three modulation schemes applied to two low data rate (LDR) ultra wideband (UWB) non-coherent receivers, namely the quadratic detector and differential detector. In order evaluate properly impact UWB multipath channels on performance, new statistical models energy collection are proposed, then taken into account in expressions error probability. Finally, critical system parameters, such as optimal integration time for or major synchronization...
A convenient technique for mitigating the impact of non-line sight (NLOS) ranging errors on positioning accuracy within indoor ultra wideband (UWB) ad-hoc networks is proposed in this paper. At first, classical error models are adapted to specific UWB context by considering real channel measurements, which were performed band [2:6] GHz. Then, it demonstrated that a prior knowledge statistics coupled with cooperative maximization global likelihood among network, make possible reduce...
The work presented in this paper is the first integrated design that conciliates full digital reception, emission and baseband with low power consumption 4-to-5 GHz band. Power an important issue of reception when digitization RF signals into N bits needs frequencies up to 20 GHz. We hereafter describe a non-coherent receiver simply digitizes signal asynchronously on only one bit calculates 500 MHz bandwidth. sampling frequency hence reduced 1 while 1b conversion simplifies consequently...
5G radio at millimeter wave (mmWave) and beyond concepts 0.1-1 THz can exploit angle delay measurements for localization, by the virtue of increased bandwidth large antenna arrays but are limited in terms blockage caused obstacles. Reconfigurable intelligent surfaces (RISs) seen as a transformative technology that control physical propagation environment which they embedded passively reflecting EM waves preferred directions. Whereas such RISs have been mainly intended communication purposes,...
Many different techniques for time-of-arrival (ToA) estimation have been described UWB signals however they are typically highly complex. Energy detection based architectures recently seen as an interesting, low complexity solution non-coherent ToA estimation. This paper presents a maximum likelihood (ML) strategy on energy approach utilizing relatively long integration window. The technique offers improved accuracy whilst overcoming the practical hardware limitation associated with need...
The rising concept of reconfigurable intelligent surface (RIS) has promising potential for Beyond 5G localization applications. We herein investigate different phase profile designs at a reflective RIS, which enable non-line-of-sight positioning in nearfield from downlink single antenna transmissions. first derive the closed-form expressions corresponding Fisher information matrix (FIM) and position error bound (PEB). Accordingly, we then propose new localization-optimal design, assuming...
The Internet of Things (IoT) has accelerated the innovations in connected car domain. Together with Intelligent Transportation Systems (ITS), IoT technologies envision unleashing efficient and more sustainable transportation systems. A is already considered as an resource whose capabilities can be exposed through platform, but few testbeds provide full-stack, cloud-based environment for services experimentation. This paper formulates several research engineering challenges developing such...
Smart radio environments (SREs) are seen as a key rising concept of next generation wireless networks, where propagation channels between transmitters and receivers purposely controlled. One promising approach to achieve such channel flexibility relies on semi-passive reflective Reconfigurable intelligent surfaces (RISs), which can shape the bouncing multipath signals for enhancing communication quality service, making localization feasible in adverse operating conditions, or reducing...
In this paper, we propose to use Bayesian filtering techniques so as handle mobility and deal with biased times of arrivals (TOA) in indoor ultra wideband (UWB) positioning systems. More particularly, the modified extended Kalman filter (MEKF) regularized particle (MRPF) enable track large biases affecting estimated radiolocation metrics due LOS/NLOS and/or NLOS/NLOS transitions. Simulations were performed a relevant deterministic UWB propagation model under realistic assumptions. One...
In an effort to improve positioning accuracy in Vehicular Ad hoc NETworks (VANETs), Cooperative Localization (CLoc) has been proposed fuse relative observations from Vehicle-to-Vehicle (V2V) communication devices with absolute on-board resources such as Global Navigation Satellite Systems (GNSS), Inertial Measurement Units (IMU), and Wheel Speed Sensors (WSSs). challenging but common tunnel environments, prolonged GNSS outages unsustainable error accumulation of inertial sensors over time...
Cooperative positioning based on Impulse Radio — Ultra WideBand (IR-UWB) is known to provide a centimeter-level accuracy when the positions of anchor nodes are perfectly known. In Vehicular Ad-Hoc Networks (VANETs), vehicles acting as "virtual anchor" highly mobile with imperfect position estimates delivered by Global Navigation Satellite System (GNSS). The large difference between measurement noises GNSS and IR-UWB Vehicle-to-Vehicle (V2V) ranging creates bias in localization filter, which...