Browsing by Author "Khattab, T."
Now showing items 61-80 of 96
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On the Achievable Degrees of Freedom of a Relay Aided X-Channel
( Institute of Electrical and Electronics Engineers Inc. , 2018 , Conference Paper)In this paper, we investigate the effect of a relay on the Degrees of Freedom (DoF) of a single input single output (SISO) X-channel with no channel state information at transmitters (CSIT). In contrast to previous work, ... -
On the delay of finite buffered multi-hop relay wireless internet of things
( Institute of Electrical and Electronics Engineers Inc. , 2019 , Conference Paper)The evolution of Internet of Things (IoT) as a new application in wireless networks mandates the utilization of wireless cooperative relaying to overcome the energy limitations of IoT devices. Multi-hop relaying is a ... -
On the Performance of Quickest Detection Spectrum Sensing: The Case of Cumulative Sum
( Institute of Electrical and Electronics Engineers Inc. , 2020 , Article)Quickest change detection (QCD) is a fundamental problem in many applications. Given a sequence of measurements that exhibits two different distributions around a certain flipping point, the goal is to detect the change ... -
On the statistical distribution of electric field inside jet engines
(2013 , Conference Paper)Using full wave analysis in 'Ansys HFSS', we obtain the electric field distribution inside a jet engine containing one set of 24 blades due to the excitation provided by a simple Hertzian dipole. Hertzian dipole illuminates ... -
On the statistical distribution of electric field inside jet engines
(2013 , Conference Paper)Using full wave analysis in 'Ansys HFSS', we obtain the electric field distribution inside a jet engine containing one set of 24 blades due to the excitation provided by a simple Hertzian dipole. Hertzian dipole illuminates ... -
On the study of field uniformity inside jet engines
( Institute of Electrical and Electronics Engineers Inc. , 2015 , Conference Paper)In this paper, the field uniformity of axial electric field component inside an anisotropic jet engine environment is analyzed by using Ansys HFSS simulation tool. The standard deviation based approach is used for the ... -
On the study of field uniformity inside jet engines
( Institute of Electrical and Electronics Engineers Inc. , 2015 , Conference Paper)In this paper, the field uniformity of axial electric field component inside an anisotropic jet engine environment is analyzed by using Ansys HFSS simulation tool. The standard deviation based approach is used for the ... -
On the Study of the Effect of Frequency Deviation on Electric Field Characteristics Inside Jet Engines
( Institute of Electrical and Electronics Engineers Inc. , 2018 , Conference Paper)A novel analysis of effect of frequency shift on the characteristics of the electromagnetic field distribution inside a simplified jet engine model is provided. The simplified jet engine structure is modeled as a metallic ... -
Optimal cooperative cognitive relaying and spectrum access for an energy harvesting cognitive radio: Reinforcement learning approach
( Institute of Electrical and Electronics Engineers Inc. , 2015 , Conference Paper)In this paper, we consider a cognitive setting under the context of cooperative communications, where the cognitive radio (CR) user is assumed to be a self-organized relay for the network. The CR user and the primary user ... -
Optimal spectrum access for a rechargeable cognitive radio user based on energy buffer state
( Institute of Electrical and Electronics Engineers Inc. , 2015 , Conference Paper)This paper investigates the maximum throughput for a rechargeable secondary user (SU) sharing the spectrum with a primary user (PU) plugged to a reliable power supply. The SU maintains a finite energy queue and harvests ... -
Packet relaying control in sensing-based spectrum sharing systems
(2013 , Conference Paper)Cognitive relaying has been introduced for opportunistic spectrum access systems by which a secondary node forwards primary packets whenever the primary link faces an outage condition. For spectrum sharing systems, cognitive ... -
Patch antenna array designs for wireless communication applications inside jet engines
( Institute of Electrical and Electronics Engineers Inc. , 2019 , Article)In this paper, two different patch antenna geometries are proposed for wireless sensor applications involving electromagnetic propagation from inside the jet engine to our designed relaying antenna at the rim of the inlet. ... -
Performance analysis of general order selection in decentralized cognitive radio networks
( IEEE , 2014 , Conference Paper)In this paper, we consider an underlay secondary network comprising of K transmitter-receiver pairs sharing the spectrum of a primary network, which is divided into n non-overlapping frequency bands (subchannels). Each ... -
Performance of THz Communications Over Cascaded RISs: A Practical Solution to the Over-Determined Formulation
( Institute of Electrical and Electronics Engineers Inc. , 2022 , Article)As a last resort for radio frequency communication, Terahertz bands (0.1-10 THz) are targeted thanks to their ability to provide ultra-wide bandwidth satisfying varieties of emerging applications. However, the waves ... -
Power budgeting of LEO satellites: An electrical power system design for 5G missions
( Institute of Electrical and Electronics Engineers Inc. , 2021 , Article)Although Geostationary-Equatorial-Orbit (GEO) satellites have achieved significant success in conducting space missions, they cannot meet the 5G latency requirements due to the far distance from the earth surface. Therefore, ... -
Power-optimal feedback-based random spectrum access for an energy harvesting cognitive user
( Institute of Electrical and Electronics Engineers Inc. , 2015 , Conference Paper)In this paper, we study and analyze cognitive radio networks in which secondary users (SUs) are equipped with energy harvesting (EH) capability. We design a random spectrum sensing and access protocol for the SU that ... -
A predictive strategy for lifetime maximization in selective relay networks
( IEEE , 2009 , Conference Paper)Two algorithms based on an energy conserving dynamic transmit power threshold are proposed for improving the lifetime in relay networks utilizing selective relay strategies with amplify-and-forward (AF) relays. the lifetime ... -
Priority-based scheduling for limited energy cognitive relaying
( IEEE , 2010 , Conference Paper)We study the problem of cognitive relaying with limited-energy constraint in opportunistic spectrum access cognitive networks. Under this network setting, the cognitive user increases the spectrum availability for its own ... -
Proactive power allocation and caching node selection for regular service guarantees
( Institute of Electrical and Electronics Engineers Inc. , 2018 , Conference Paper)This paper studies the potential of proactive resource allocation to prolong the communication sessions in networks with limited energy budgets and stringent quality-of-service (QoS) requirement, particularly a regular ... -
Residual self-interference analysis for full-duplex OFDM transceivers under phase noise and I/Q imbalance
( Institute of Electrical and Electronics Engineers Inc. , 2017 , Article)In this letter, we investigate the detrimental effects of phase noise (PN) and in-phase/quadrature (I/Q) imbalance (IQI) on full-duplex OFDM transceivers. In particular, we derive a closed-form expression for the average ...
