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Array Geometry-Centric Axial Sidelobe Interference Analysis for Near-Field Multi-User MIMO
Ahmed Hussain, Asmaa Abdallah, Abdulkadir Celik +1
With the deployment of large antenna arrays at high-frequency bands, future wireless communication systems are likely to operate in the radiative near-field (NF). Unlike far-field…
Spatial Degrees of Freedom in Near Field MIMO: Experimental Validation of Beamspace Perspective
Ahmed Hussain, Asmaa Abdallah, Ahmed Nasser +2
Conventional far-field multiple-input multiple-output (MIMO) channels are limited to a single spatial degree of freedom (DoF) under a line-of-sight (LoS) condition. In contrast, th…
Analyzing URA Geometry for Enhanced Near-Field Beamfocusing and Spatial Degrees of Freedom
Ahmed Hussain, Asmaa Abdallah, Abdulkadir Celik +2
With the deployment of large antenna arrays at high-frequency bands, future wireless communication systems are likely to operate in the radiative near-field. Unlike far-field beam…
Sparse Array Design for Near-Field MU-MIMO: Reconfigurable Array Thinning Approach
Ahmed Hussain, Asmaa Abdallah, Abdulkadir Celik +2
Future wireless networks, deploying thousands of antenna elements, may operate in the radiative near-field (NF), enabling spatial multiplexing across both angle and range domains.…
Near Field Tapering with Slepian Window: Balancing the Range Angle Sidelobe Trade off
Ahmed Hussain, Ahmed Sultan, Asmaa Abdallah +2
Near-field beamforming enables target discrimination in both range (axial) and angle (lateral) dimensions. Elevated sidelobes along either dimension, however, increase susceptibili…
Uniform Circular Arrays in Near-Field: Omnidirectional Coverage with Limited Capacity
Ahmed Hussain, Asmaa Abdallah, Abdulkadir Celik +1
Recent studies suggest that uniform circular arrays (UCAs) can extend the angular coverage of the radiative near field region. This work investigates whether such enhanced angular…
Joint Motion, Angle, and Range Estimation in Near-Field under Array Calibration Imperfections
Ahmed Hussain, Asmaa Abdallah, Abdulkadir Celik +1
Ultra-massive multiple-input multiple-output MIMO (UM-MIMO) leverages large antenna arrays at high frequencies, transitioning communication paradigm into the radiative near-field (…
Analyzing URA Geometry for Enhanced Spatial Multiplexing and Extended Near-Field Coverage
Ahmed Hussain, Asmaa Abdallah, Abdulkadir Celik +1
With the deployment of large antenna arrays at high frequency bands, future wireless communication systems are likely to operate in the radiative near-field. Unlike far-field beam…
Near-Field Beam Prediction Using Far-Field Codebooks in Ultra-Massive MIMO Systems
Ahmed Hussain, Asmaa Abdallah, Abdulkadir Celik +1
Ultra-massive multiple-input multiple-output (UM-MIMO) technology is a key enabler for 6G networks, offering exceptional high data rates in millimeter-wave (mmWave) and Terahertz (…
Explainable and Robust Millimeter Wave Beam Alignment for AI-Native 6G Networks
Nasir Khan, Asmaa Abdallah, Abdulkadir Celik +2
Integrated artificial intelligence (AI) and communication has been recognized as a key pillar of 6G and beyond networks. In line with AI-native 6G vision, explainability and robust…
Explainable AI-aided Feature Selection and Model Reduction for DRL-based V2X Resource Allocation
Nasir Khan, Asmaa Abdallah, Abdulkadir Celik +2
Artificial intelligence (AI) is expected to significantly enhance radio resource management (RRM) in sixth-generation (6G) networks. However, the lack of explainability in complex…
Near-Field ISAC: Synergy of Dual-Purpose Codebooks and Space-Time Adaptive Processing
Ahmed Hussain, Asmaa Abdallah, Abdulkadir Celik +1
Integrated sensing and communication (ISAC) has emerged as a transformative paradigm, enabling situationally aware and perceptive next-generation wireless networks through the co-d…
RIS-Assisted Grant-Free NOMA
Recep Akif Tasci, Fatih Kilinc, Abdulkadir Celik +3
This paper introduces a reconfigurable intelligent surface (RIS)-assisted grant-free non-orthogonal multiple-access (GF-NOMA) scheme. To ensure the power reception disparity requir…