1 code implementation • 31 Mar 2024 • Salmane Naoumi, Ahmad Bazzi, Roberto Bomfin, Marwa Chafii
Integrated sensing and communication (ISAC) in wireless systems has emerged as a promising paradigm, offering the potential for improved performance, efficient resource utilization, and mutually beneficial interactions between radar sensing and wireless communications, thereby shaping the future of wireless technologies.
no code implementations • 1 Feb 2024 • Roberto Bomfin, Konpal Shaukat Ali, Marwa Chafii
In this work, we provide a system level analysis of integrated sensing and communication (ISAC) systems, where a setup with a mono-static dual-functional radar communication base station is assumed.
no code implementations • 31 Jan 2024 • Roberto Bomfin, Marwa Chafii
In particular, we show that the PD expressions lead to an upper bound for the ZP-OFDM transmission, which is useful for selecting the best ZP size for a given system configuration.
no code implementations • 31 Dec 2023 • Dexin Wang, Ahmad Bazzi, Marwa Chafii
Therefore, this work proposes a localization algorithm tailored for the integrated sensing and communications RIS-aided architecture, which is capable of uniquely positioning targets within the scene.
no code implementations • 18 Dec 2023 • Ahmad Bazzi, Marwa Chafii
Based on the proposed model, we formulate a power efficient secure ISAC optimization framework design, which is intended to guarantee both UL and DL secrecy rates requirements, while illuminating radar beams towards eavesdroppers.
no code implementations • 12 Sep 2023 • Marwa Chafii, Salmane Naoumi, REDA ALAMI, Ebtesam Almazrouei, Mehdi Bennis, Merouane Debbah
In different wireless network scenarios, multiple network entities need to cooperate in order to achieve a common task with minimum delay and energy consumption.
no code implementations • 22 Jun 2023 • Ahmad Bazzi, Marwa Chafii
The following paper presents a novel orthogonal pilot design dedicated for dual-functional radar and communication (DFRC) systems performing multi-user communications and target detection.
no code implementations • 9 Jun 2023 • Ibrahim Sbeity, Christophe Villien, Christophe Combettes, Benoît Denis, E Veronica Belmega, Marwa Chafii
This work presents a new approach for detection and exclusion (or de-weighting) of pseudo-range measurements from the Global Navigation Satellite System (GNSS) in order to improve the accuracy of single-epoch positioning, which is an essential prerequisite for maintaining good navigation performance in challenging operating contexts (e. g., under Non-Line of Sight and/or multipath propagation).
no code implementations • 6 Jun 2023 • Ivo Bizon, Ahmad Nimr, Philipp Schulz, Marwa Chafii, Gerhard P. Fettweis
This work presents an investigation on the scalability of a deep leaning (DL)-based blind transmitter positioning system for addressing the multi transmitter localization (MLT) problem.
no code implementations • 6 Jun 2023 • Ivo Bizon, Zhongju Li, Ahmad Nimr, Marwa Chafii, Gerhard P. Fettweis
For obtaining experimental data, we collect power measurements associated with reference positions using a wireless sensor network in an indoor scenario.
no code implementations • 5 May 2023 • Vaibhav Kumar, Marwa Chafii, A. Lee Swindlehurst, Le-Nam Tran, Mark F. Flanagan
Integrated sensing and communication (ISAC) is expected to be offered as a fundamental service in the upcoming sixth-generation (6G) communications standard.
no code implementations • 5 May 2023 • Mamady Delamou, Ahmad Bazzi, Marwa Chafii, El Mehdi Amhoud
Target detection and recognition is a very challenging task in a wireless environment where a multitude of objects are located, whether to effectively determine their positions or to identify them and predict their moves.
no code implementations • 29 Apr 2023 • Abdul Karim Gizzini, Marwa Chafii
Doubly-selective channel estimation represents a key element in ensuring communication reliability in wireless systems.
no code implementations • 14 Mar 2023 • Ahmad Bazzi, Marwa Chafii
This work presents a novel robust beamforming design dedicated for dual-functional radar and communication (DFRC) base stations (BSs) in the context of integrated sensing and communications (ISAC).
no code implementations • 10 Mar 2023 • Akhileswar Chowdary, Ahmad Bazzi, Marwa Chafii
The following paper introduces a novel integrated sensing and communication (ISAC) scenario termed hybrid radar fusion.
no code implementations • 21 Oct 2022 • Ahmad Bazzi, Marwa Chafii
In this paper, we study a communication-centric integrated sensing and communication (ISAC) approach, where an access point (AP) communicates with users, while a passive radar (PR) is present in the environment.
no code implementations • 8 Oct 2022 • Ali Waqar Azim, Ahmad Bazzi, Mahrukh Fatima, Raed Shubair, Marwa Chafii
One of these symbols consisting of even and odd frequency shifts (FSs) is chirped using an up-chirp.
no code implementations • 6 Oct 2022 • Ahmad Bazzi, Marwa Chafii
We present a novel approach to the problem of dual-functional radar and communication (DFRC) waveform design with adjustable peak-to-average power ratio (PAPR), while minimizing the multi-user communication interference and maintaining a similarity constraint towards a radar chirp signal.
no code implementations • 22 Aug 2022 • Ali Waqar Azim, Ahmad Bazzi, Raed Shubair, Marwa Chafii
Despite this, there has been a dearth of research dedicated to enhancing the data transfer capabilities of LoRa until recently, when a plethora of CSS-based PHY layer alternatives to LoRa for LPWANs was proposed.
no code implementations • 11 Jul 2022 • Ahmad Bazzi, Marwa Chafii
This article studies and derives beamforming design in a dual-functional radar-communication (DFRC) multiple-input-multiple-output system.
1 code implementation • IEEE Access 2022 • Abdul Karim Gizzini, Marwa Chafii
Wireless communications systems are impacted by multi-path fading and Doppler shift in dynamic environments, where the channel becomes doubly-dispersive and its estimation becomes an arduous task.
no code implementations • 23 May 2022 • Yaya Etiabi, Marwa Chafii, El Mehdi Amhoud
Federated distillation (FD) paradigm has been recently proposed as a promising alternative to federated learning (FL) especially in wireless sensor networks with limited communication resources.
no code implementations • 20 May 2022 • Ali Waqar Azim, Yannis Le Guennec, Marwa Chafii, Laurent Ros
In this communication, we propose a framework for amalgamating optical-orthogonal frequency-division multiplexing (O-OFDM) and O-OFDM with index modulation (O-OFDM-IM) for optical wireless systems.
no code implementations • 19 May 2022 • Ali Waqar Azim, Ahmad Bazzi, Raed Shubair, Marwa Chafii
The SE increases by up to \(116. 66\%\) for the same bandwidth and spreading factor relative to LoRa.
no code implementations • 14 Apr 2022 • Qiaohan Zhang, Ivo Bizon, Atul Kumar, Ana Belen Martinez, Marwa Chafii, Gerhard Fettweis
In this paper, we analytically model this interference, and propose an interference cancellation method based on the idea of segmentation of the received signal.
1 code implementation • IEEE Access 2022 • Abdul Karim Gizzini, Marwa Chafii
Wireless communications play a significant role in facilitating several mobile applications like unmanned aerial vehicles, high-speed railway, and vehicular communications.
no code implementations • 5 Mar 2022 • Garima Chopra, Akhileswar Chowdary, Abhinav Kumar, Marwa Chafii
However, it has been shown in the existing works that maximizing the sum rate can result in asymmetric user performance.
no code implementations • 4 Aug 2021 • Mohamed I. AlHajri, Raed M. Shubair, Marwa Chafii
Moreover, with only 40% data measurements, the proposed cross-environment approach compensates for data inadequacy and replicates the localization accuracy of the conventional method, CNN, which uses 75% data measurements.
no code implementations • IEEE Transactions on Vehicular Technology 2021 • Abdul Karim Gizzini, Marwa Chafii, Ahmad Nimr, Raed M. Shubair, Gerhard Fettweis
IEEE 802. 11p standard defines wireless technology protocols that enable vehicular transportation and manage traffic efficiency.
no code implementations • 2 Apr 2021 • Roberto Bomfin, Marwa Chafii, Ahmad Nimr, Gerhard Fettweis
The OTFS modulation has been recently proposed as a robust technique under time varying channels due to its property of spreading the data symbols over time and frequency.
no code implementations • 5 Mar 2021 • El-Mehdi Amhoud, Marwa Chafii, Ahmad Nimr, Gerhard Fettweis
Communication using orbital angular momentum (OAM) modes has recently received a considerable interest in free space optical (FSO) communications.
no code implementations • 18 Feb 2021 • Ivo Bizon Franco de Almeida, Marwa Chafii, Ahmad Nimr, Gerhard Fettweis
Chirp spread spectrum (CSS) is the modulation technique currently employed by Long-Range (LoRa), which is one of the most prominent Internet of things wireless communications standards.
no code implementations • 5 Jan 2021 • Arsenia Chorti, Andre Noll Barreto, Stefan Kopsell, Marco Zoli, Marwa Chafii, Philippe Sehier, Gerhard Fettweis, H. Vincent Poor
Sixth generation systems are expected to face new security challenges, while opening up new frontiers towards context awareness in the wireless edge.
Cryptography and Security Signal Processing
1 code implementation • IEEE Globecom Workshops (GC Wkshps) 2020 • Abdul Karim Gizzini, Marwa Chafii, Ahmad Nimr, Gerhard Fettweis
IEEE 802. 11p standard enables the wireless technology that defines vehicular communications.
1 code implementation • IEEE 92nd Vehicular Technology Conference (VTC2020-Fall) 2020 • Abdul Karim Gizzini, Marwa Chafii, Ahmad Nimr, Gerhard Fettweis
Channel state information is very critical in various applications such as physical layer security, indoor localization, and channel equalization.
no code implementations • 22 Sep 2020 • Ivo Bizon Franco de Almeida, Marwa Chafii, Ahmad Nimr, Gerhard Fettweis
In this paper, we propose a scheme that encodes information bits on both in-phase and quadrature components of the chirp signal, and rather employs a coherent detector at the receiver.
1 code implementation • IEEE 91st Vehicular Technology Conference (VTC2020-Spring) 2020 • Abdul Karim Gizzini, Marwa Chafii, Ahmad Nimr, Gerhard Fettweis
Least square (LS) channel estimation employed in various communications systems suffers from performance degradation especially in low signal-to-noise ratio (SNR) regions.
1 code implementation • IEEE Access 2020 • Abdul Karim Gizzini, Marwa Chafii, Ahmad Nimr, Gerhard Fettweis
IEEE 802. 11p standard is specially developed to define vehicular communications requirements and support cooperative intelligent transport systems.