Browsing by Author "Al-Dhahir, N."
Now showing items 1-18 of 18
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A Secret-key-aided scheme to secure transmissions from single-antenna RF-eh source nodes
( Institute of Electrical and Electronics Engineers Inc. , 2018 , Article)We propose a two-phase artificial-noise-aided scheme to power a single-antenna energy-harvesting source node (Alice) and secure her transmissions to a multiple-antenna legitimate destination (Bob) in the presence of a ... -
A sparsity-aware approach for NBI estimation and mitigation in large cognitive radio networks
( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference)Underlay cognitive networks should follow strict interference thresholds to operate in parallel with primary networks. This constraint limits their transmission power and eventually the coverage area. Therefore, in this ... -
A Unified Framework for Differentiated Services in Intelligent Healthcare Systems
( IEEE , 2022 , Article)The Coronavirus disease 2019 (COVID-19) outbreak continues to significantly expose the vulnerabilities of healthcare systems around the world. These unprecedented circumstances create an opportunity for improving healthcare ... -
Coexistence of IEEE 802.15.4g and WLAN: An Adaptive Power Control Approach
( IEEE , 2023 , Conference)This paper addresses the problem of coexistence between smart grid based wireless communication networks and other interfering signals. Particularly, the problem of interfering wireless local area network (WLAN) signals ... -
Deterministic measurement procedures for diagnosis of massive uniform linear antenna arrays
( Institute of Electrical and Electronics Engineers Inc. , 2017 , Conference)The number and relative geometry of collected measurements significantly affect the reliability of massive antenna array diagnosis. In this paper, we investigate and compare two deterministic algorithms for taking measurements ... -
Full-Duplex Amplify-and-Forward Relaying under I/Q Imbalance
( Institute of Electrical and Electronics Engineers Inc. , 2020 , Article)A major performance limiter in amplify-and-forward (AF) full-duplex (FD) relaying is the high level of residual self-interference (SI) due to the imperfect estimation of the effective self-interfering channel. One primary ... -
I/Q imbalance and loop-back self interference effects in full-duplex OFDM DF relays
( IEEE , 2015 , Conference)We analyze the outage probability of dual-hop full-duplex decode-and-forward relaying for an orthogonal frequency division multiplexing system in the presence of I/Q imbalance. We derive accurate analytical approximations ... -
Impact of Passive and Active Security Attacks on MIMO Smart Grid Communications
( Institute of Electrical and Electronics Engineers Inc. , 2019 , Article)We consider multiple source nodes (consumers) communicating wirelessly their energy demands to the meter data-management system (MDMS) over the subarea gateway(s). We quantify the impact of passive and active security ... -
Machine-Learning Based Relay Selection in AF Cooperative Networks
( Institute of Electrical and Electronics Engineers Inc. , 2019 , Conference)With the significant increase of wireless network nodes and traffic load in recent years, especially in the emerging internet-of-things (IoT) and vehicular networks, the design of a fast adaptive relay selection algorithm ... -
Maximum achievable throughput and interference mitigation for SUN in coexistence with WLAN
( Institute of Electrical and Electronics Engineers Inc. , 2018 , Conference)An optimum packet length selection scheme to maximize the throughput of a smart utility network (SUN) is introduced under wireless local area network (WLAN) interference system. The traditional and the investigated segmented ... -
OFDM Full-Duplex DF Relaying under I/Q Imbalance and Loopback Self-Interference
( Institute of Electrical and Electronics Engineers Inc. , 2016 , Article)We analyze the outage probability of dual-hop full-duplex (FD) decode-and-forward (DF) relaying for an orthogonal frequency-division multiplexing (OFDM) system in the presence of in-phase and quadrature-phase (I/Q) imbalance ... -
On I/Q imbalance effects in full-duplex OFDM decode-and-forward relays
( IEEE , 2014 , Conference)We analyze the outage probability of dual-hop full-duplex decode-and-forward relaying for an orthogonal frequency division multiplexing system in the presence of I/Q imbalance. We derive accurate analytical approximations ... -
Reduced-complexity sparsity-aware joint phase noise mitigation and channel equalization in OFDM receivers
( Elsevier B.V. , 2018 , Article)A major performance and complexity limitation in direct-conversion broadband wireless transceivers is the phase noise (PN) resulting from the inevitable imperfections in the fabrication process of the crystal oscillator. ... -
Relay selection in FDD amplify-and-forward cooperative networks
( Institute of Electrical and Electronics Engineers Inc. , 2018 , Conference)In this paper, the problems of relay selection and distributed beamforming are investigated for bi-directional dual-hop amplify-and-forward frequency-division duplex cooperative wireless networks. When using individual ... -
Sparse Equalizers for OFDM Signals with Insufficient Cyclic Prefix
( Institute of Electrical and Electronics Engineers Inc. , 2018 , Article)The cyclic prefix (CP) is appended in orthogonal frequency division multiplexing (OFDM) signals to combat inter-symbol interference (ISI) and inter-carrier interference (ICI) induced by the communication channel, which ... -
Sparsity-Aware multiple relay selection in large dual-hop decode-And-forward broadband relay networks
( IEEE , 2016 , Conference)In this paper, three novel techniques are proposed and investigated for multiple relay selection in dual hop OFDM networks. These techniques are based on the exploitation of sparse signal recovery theory and on carefully-designed ... -
Sparsity-aware multiple relay selection in large multi-hop decode-and-forward relay networks
( Springer International Publishing , 2016 , Article)In this paper, we propose and investigate two novel techniques to perform multiple relay selection in large multi-hop decode-and-forward relay networks. The two proposed techniques exploit sparse signal recovery theory to ... -
Sparsity-aware narrowband interference mitigation and subcarriers selection in OFDM-based cognitive radio networks
( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference)In this paper, the performance of an orthogonal frequency division multiplexing overlay cognitive radio network with subcarrier selection schemes is investigated. We propose three subcarrier selection techniques that reduce ...
