70 citations · 193 across the 22 of their papers we have counts for
24 papers
Channel Estimation in MIMO Systems Using Flow Matching Models
Yongqiang Zhang, Qurrat-Ul-Ain Nadeem
Multiple-input multiple-output (MIMO) systems require efficient and accurate channel estimation with low pilot overhead to unlock their full potential for high spectral and energy…
Merits of Serving UAVs via Terrestrial Networks: A Vertical Antenna Radiation Study
Nesrine Cherif, Qurrat-Ul-Ain Nadeem
Unmanned Aerial Vehicles (UAVs) are increasingly used in a plethora of applications such as shipping, surveillance, and search-and-rescue. For UAVs to operate safely, reliable cell…
RIS-Assisted Aerial Non-Terrestrial Networks: An Intelligent Synergy with Deep Reinforcement Learning
Muhammad Umer, Muhammad Ahmed Mohsin, Aryan Kaushik +3
Reconfigurable intelligent surface (RIS)-assisted aerial non-terrestrial networks (NTNs) offer a promising paradigm for enhancing wireless communications in the era of 6G and beyon…
Analysis of One-Bit Quantized Linear Precoding Schemes in Multi-Cell Massive MIMO Downlink
Qurrat-Ul-Ain Nadeem, Anas Chaaban
This work studies a multi-cell one-bit massive multiple-input multiple-output (MIMO) system that employs one-bit analog-to-digital converters (ADCs) and digital-to-analog converter…
Hybrid Digital-Wave Domain Channel Estimator for Stacked Intelligent Metasurface Enabled Multi-User MISO Systems
Qurrat-Ul-Ain Nadeem, Jiancheng An, Anas Chaaban
Stacked intelligent metasurface (SIM) is an emerging programmable metasurface architecture that can implement signal processing directly in the electromagnetic wave domain, thereby…
Unit Cell Phase-Frequency Profile Optimization in RIS-Assisted Wide-Band OFDM Systems
Omran Abbas, Qurrat-Ul-Ain Nadeem, Loïc Markley +1
The reflection characteristics of a reconfigurable intelligent surface (RIS) depend on the phase response of the constituent unit cells, which is necessarily frequency dependent. T…
Reconfigurable Intelligent Surfaces Assisted Communication Under Different CSI Assumptions
Bayan Al-Nahhas, Qurrat-UI-Ain Nadeem, Aryan Kaushik +1
This work studies the net sum-rate performance of a distributed reconfigurable intelligent surfaces (RISs)-assisted multi-user multiple-input-single-output (MISO) downlink communic…
Holographic MIMO: How Many Antennas Do We Need for Energy Efficient Transmission?
Sarah Bahanshal, Qurrat-Ul-Ain Nadeem, Md. Jahangir Hossain
Holographic multiple-input multiple-output (HMIMO) communication systems utilize spatially-constrained massive MIMO arrays containing large numbers of antennas with sub-wavelength…
Performance Analysis of Zero-Forcing Precoding in Multi-Cell One-Bit Massive MIMO Downlink
Qurrat-Ul-Ain Nadeem, Anas Chaaban
This work investigates the downlink performance of a multi-cell massive multiple-input multiple-output (MIMO) system that employs one-bit analog-to-digital converters (ADCs) and di…
Performance Analysis under IRS-User Association for Distributed IRSs Assisted MISO Systems
Hibatallah Alwazani, Qurrat-Ul-Ain Nadeem, Anas Chaaban
Distributed intelligent reflecting surfaces (IRSs) deployed in multi-user wireless communication systems promise improved system performance. However, the signal-to-interference-pl…
Distributed Reconfigurable Intelligent Surfaces Assisted Wireless Communication: Asymptotic Analysis under Imperfect CSI
Bayan Al-Nahhas, Qurrat-Ul-Ain Nadeem, Anas Chaaban
This work studies the net sum-rate performance of a distributed reconfigurable intelligent surfaces (RISs)-assisted multi-user multiple-input-single-output (MISO) downlink communic…
Intelligent Reflecting Surface Enabled Random Rotations Scheme for the MISO Broadcast Channel
Qurrat-Ul-Ain Nadeem, Alessio Zappone, Anas Chaaban
The current literature on intelligent reflecting surface (IRS) focuses on optimizing the IRS phase shifts to yield coherent beamforming gains, under the assumption of perfect chann…
Channel Estimation for Distributed Intelligent Reflecting Surfaces Assisted Multi-User MISO Systems
Hibatallah Alwazani, Qurrat-Ul-Ain Nadeem, Anas Chaaban
Intelligent reflecting surfaces (IRSs)-assisted wireless communication promises improved system performance, while posing new challenges in channel estimation (CE) due to the passi…
Opportunistic Beamforming using an Intelligent Reflecting Surface Without Instantaneous CSI
Qurrat-Ul-Ain Nadeem, Anas Chaaban, Merouane Debbah
While intelligent reflecting surface (IRS) assisted wireless communication has emerged as an important research paradigm, channel state information (CSI) acquisition remains a crit…
Intelligent Reflecting Surface Assisted MISO Downlink: Channel Estimation and Asymptotic Analysis
Bayan Al-Nahhas, Qurrat-Ul-Ain Nadeem, Anas Chaaban
This work makes the preliminary contribution of studying the asymptotic performance of a multi-user intelligent reflecting surface (IRS) assisted-multiple-input single-output (MISO…
Intelligent Reflecting Surface Assisted Multi-User MISO Communication: Channel Estimation and Beamforming Design
Qurrat-Ul-Ain Nadeem, Hibatallah Alwazani, Abla Kammoun +3
The concept of reconfiguring wireless propagation environments using intelligent reflecting surfaces (IRS)s has recently emerged, where an IRS comprises of a large number of passiv…
Multi-User Opportunistic Beamforming using Reconfigurable Surfaces
Qurrat-Ul-Ain Nadeem, Anas Chaaban, Merouane Debbah
Multi-user (MU) diversity yields sum-rate gains by scheduling a user for transmission at times when its channel is near its peak. The only information required at the base station…
Intelligent Reflecting Surface Assisted Wireless Communication: Modeling and Channel Estimation
Qurrat-Ul-Ain Nadeem, Abla Kammoun, Anas Chaaban +2
The recently completed 5G new radio standard is a result of several cutting-edge technologies, including massive multiple-input multiple-output (MIMO), millimeter (mm)-Wave communi…
Asymptotic Analysis of RZF over Double Scattering Channels with MMSE Estimation
Qurrat-Ul-Ain Nadeem, Abla Kammoun, Merouane Debbah +1
This paper studies the ergodic rate performance of regularized zero-forcing (RZF) precoding in the downlink of a multi-user multiple-input single-output (MISO) system, where the ch…
Asymptotic Max-Min SINR Analysis of Reconfigurable Intelligent Surface Assisted MISO Systems
Qurrat-Ul-Ain Nadeem, Abla Kammoun, Anas Chaaban +2
This work focuses on the downlink of a single-cell multi-user system in which a base station (BS) equipped with antennas communicates with single-antenna users through a re…
Elevation Beamforming with Full Dimension MIMO Architectures in 5G Systems: A Tutorial
Qurrat-Ul-Ain Nadeem, Abla Kammoun, Mohamed-Slim Alouini
Full dimension (FD) multiple-input multiple-output (MIMO) technology has attracted substantial research attention from both wireless industry and academia in the last few years as…
Design of 5G Full Dimension Massive MIMO Systems
Qurrat-Ul-Ain Nadeem, Abla Kammoun, Mérouane Debbah +1
Massive multiple-input-multiple-output (MIMO) transmission is a promising technology to improve the capacity and reliability of wireless systems. However, the number of antennas th…
3D Massive MIMO Systems: Modeling and Performance Analysis
Qurrat-Ul-Ain Nadeem, Abla Kammoun, Merouane Debbah +1
Multiple-input-multiple-output (MIMO) systems of current LTE releases are capable of adaptation in the azimuth only. Recently, the trend is to enhance system performance by exploit…
A Generalized Spatial Correlation Model for 3D MIMO Channels based on the Fourier Coefficients of Power Spectrums
Qurrat-Ul-Ain Nadeem, Abla Kammoun, Merouane Debbah +1
Previous studies have confirmed the adverse impact of fading correlation on the mutual information (MI) of two-dimensional (2D) multiple-input multiple-output (MIMO) systems. More…