26 citations · 49 across the 21 of their papers we have counts for
19 papers · 1 filter
Outage Analysis of RSMA-Enabled Terrestrial Users Under Co-Channel Interference from HAPS
Farjam Karim, Nurul Huda Mahmood, Prathapasinghe Dharmawansa +2
The coexistence of terrestrial networks (TNs) with high-altitude platform station (HAPS)-based non-terrestrial networks (NTNs) is a promising approach for extending 6G connectivity…
Performance Analysis of HAPS-Assisted Downlink RSMA under Orthogonal and Full Frequency Reuse
Farjam Karim, Prathapasinghe Dharmawansa, Nurul Huda Mahmood +1
This paper analyzes the outage performance of a high-altitude platform station (HAPS)-assisted downlink employing rate-splitting multiple access (RSMA). A realistic link budget acc…
Rethinking Passive RIS: Finite Blocklength Reliability Analysis Under Thermal Noise
Farjam Karim, Deepak Kumar, Prathapasinghe Dharmawansa +3
Short-packet communication alters the fundamental performance limits of reconfigurable intelligent surface (RIS)-assisted systems, making conventional analyses based on the infinit…
Passive RIS Is Not Silent: Revisiting Performance Limits Under Thermal Noise
Farjam Karim, Deepak Kumar, Prathapasinghe Dharmawansa +3
Reconfigurable intelligent surfaces (RISs) have emerged as a promising solution for enabling energy-efficient and flexible spectrum usage in wireless communication, particularly in…
RSMA-Aided Full-Duplex Networks Under Imperfect CSI and SIC: Performance Evaluation
Farjam Karim, Nurul Huda Mahmood, Deepak Kumar +2
This work investigates a full-duplex (FD)-enhanced Rate-Splitting Multiple Access (RSMA) system under practical constraints, including imperfect channel state information (CSI) and…
Impact of CSIR, SIC, and Hardware Impairments on the Ergodic Rate of Downlink RSMA
Farjam Karim, Deepak Kumar, Prathapasinghe Dharmawansa +3
This work investigates the ergodic rate performance analysis of rate-splitting multiple access (RSMA) in a downlink communication system under practical impairments. Closed-form ex…
On the Impact of Electromagnetic Interference and Inter-RIS Reflections in Indoor Factory Local 6G Networks
Ishan Rangajith Koralege, Nurul Huda Mahmood, Arthur Sousa de Sena +1
The Sixth Generation (6G) radio technology is expected to include local 6G networks as a special use case, extending the capabilities of `generic' 6G networks towards more demandin…
6G Resilience -- White Paper
Hirley Alves, Nurul H. Mahmood, Onel L. A. López +36
6G must be designed to withstand, adapt to, and evolve amid prolonged, complex disruptions. Mobile networks' shift from efficiency-first to sustainability-aware has motivated this…
On the Robustness of RSMA to Adversarial BD-RIS-Induced Interference
Arthur S. de Sena, Jacek Kibilda, Nurul H. Mahmood +3
This article investigates the robustness of rate-splitting multiple access (RSMA) in multi-user multiple-input single-output (MISO) systems to interference attacks against channel…
Max-Min Fairness for Stacked Intelligent Metasurface-Assisted Multi-User MISO Systems
Nipuni Ginige, Prathapasinghe Dharmawansa, Arthur Sousa de Sena +3
Stacked intelligent metasurface (SIM) is an emerging technology that uses multiple reconfigurable surface layers to enable flexible wave-based beamforming. In this paper, we focus…
A Deep-Unfolding Approach to RIS Phase Shift Optimization Via Transformer-Based Channel Prediction
Ishan Koralege, Arthur S. de Sena, Nurul H. Mahmood +3
Reconfigurable intelligent surfaces (RISs) have emerged as a promising solution that can provide dynamic control over the propagation of electromagnetic waves. The RIS technology i…
Uplink Rate Splitting Multiple Access with Imperfect Channel State Information and Interference Cancellation
Farjam Karim, Nurul Huda Mahmood, Arthur S. de Sena +3
This article investigates the performance of uplink rate splitting multiple access (RSMA) in a two-user scenario, addressing an under-explored domain compared to its downlink count…
Interference Prediction Using Gaussian Process Regression and Management Framework for Critical Services in Local 6G Networks
Syed Luqman Shah, Nurul Huda Mahmood, Matti Latva-aho
Interference prediction and resource allocation are critical challenges in mission-critical applications where stringent latency and reliability constraints must be met. This paper…
Efficient Channel Prediction for Beyond Diagonal RIS-Assisted MIMO Systems with Channel Aging
Nipuni Ginige, Arthur Sousa de Sena, Nurul Huda Mahmood +2
Novel reconfigurable intelligent surface (RIS) architectures, known as beyond diagonal RISs (BD-RISs), have been proposed to enhance reflection efficiency and expand RIS capabiliti…
Probabilistic Allocation of Payload Code Rate and Header Copies in LR-FHSS Networks
Jamil de Araujo Farhat, Jean Michel de Souza Sant'Ana, João Luiz Rebelatto +3
We evaluate the performance of the LoRaWAN Long-Range Frequency Hopping Spread Spectrum (LR-FHSS) technique using a device-level probabilistic strategy for code rate and header rep…
Malicious RIS Meets RSMA: Unveiling the Robustness of Rate Splitting to RIS-Induced Attacks
A. S. de Sena, A. Gomes, J. Kibiłda +3
While the robustness of rate-splitting multiple access (RSMA) to imperfect channel state information (CSI) is well-documented, its susceptibility to attacks launched with malicious…
Malicious RIS versus Massive MIMO: Securing Multiple Access against RIS-based Jamming Attacks
Arthur Sousa de Sena, Jacek Kibilda, Nurul Huda Mahmood +2
In this letter, we study an attack that leverages a reconfigurable intelligent surface (RIS) to induce harmful interference toward multiple users in massive multiple-input multiple…
Beyond Diagonal RIS for Multi-Band Multi-Cell MIMO Networks: A Practical Frequency-Dependent Model and Performance Analysis
Arthur S. de Sena, Mehdi Rasti, Nurul H. Mahmood +1
This paper delves into the unexplored frequency-dependent characteristics of beyond diagonal reconfigurable intelligent surfaces (BD-RISs). A generalized practical frequency-depend…
Decomposition Based Interference Management Framework for Local 6G Networks
Samitha Gunarathne, Thushan Sivalingam, Nurul Huda Mahmood +2
Managing inter-cell interference is among the major challenges in a wireless network, more so when strict quality of service needs to be guaranteed such as in ultra-reliable low la…