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السجلات المعروضة 111 -- 120 من 152
Outage performance of cooperative systems under IQ imbalance
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Institute of Electrical and Electronics Engineers Inc.
, 2014 , Article)
In this contribution, we investigate the outage performance of OFDM-based Decode and Forward (DF), Amplify and Forward (AF) and Controlled DF (CDF) cooperative systems under IQ Imbalance (IQI). In particular, tractable and ...
Capacity enhancement in cognitive radio wireless network with dynamic spectrum access
(
IEEE Computer Society
, 2014 , Conference Paper)
Deployment of femto-cells underlaying the macro-cell has been proven to greatly improve the system capacity and the indoor coverage. However, to successfully deploy this heterogeneous network, the interference among the ...
Cognitive relay-sharing by using hierarchical modulation under interference constraints
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Institute of Electrical and Electronics Engineers Inc.
, 2014 , Conference Paper)
In this paper, we investigate relay-sharing in cognitive radio (CR) networks to improve the secondary user's (SU's) performance in the presence of interference. It is assumed that the relay is shared simultaneously between ...
Analysis of heterogeneous cellular networks interference with biased cell association using Poisson cluster processes
(
IEEE Computer Society
, 2014 , Conference Paper)
Heterogeneous cellular networks (HetNets) achieve high data rates and coverage gains by distributing small cells over macro-cells based on random user demand. Recently, a novel approach to use stochastic geometry for ...
A 3G/WiFi-enabled 6LoWPAN-based U-healthcare system for ubiquitous real-time monitoring and data logging
(
IEEE Computer Society
, 2014 , Conference Paper)
Ubiquitous healthcare (U-healthcare) systems are expected to offer flexible and resilient high-end technological solutions enabling remote monitoring of patients health status in real-time and provisioning of feedback and ...
Preliminary studies on autonomous sensor systems dedicated to air quality monitoring
(
IMEKO-International Measurement Federation Secretariat
, 2014 , Conference Paper)
Sensor systems and smart networks devoted to environmental supervision have today assisted the analysis of primal processes and they have also provided vital hazard early warnings. At the same time the use of environmental ...
Embedded gateway services for Internet of Things applications in ubiquitous healthcare
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Institute of Electrical and Electronics Engineers Inc.
, 2014 , Conference Paper)
The continuous advancement in computer and communication technologies has made personalized healthcare monitoring a rapidly growing area of interest. New features and services are envisaged, raising users' expectations in ...
Renewable energy-harvested sensor systems for air quality monitoring
(
Institute of Electrical and Electronics Engineers Inc.
, 2014 , Conference Paper)
Wireless sensor networks (WSNs) devoted to environmental monitoring has preponderantly assumed the adoption of a portable and limited energy source, (e.g. lithium, alkaline, NiMH batteries), to support the sensor ...
Development of energy efficient battery electric car for Shell Eco-Marathon competition - Qatar University experience
(
IEEE Computer Society
, 2014 , Conference Paper)
The paper reports on the participation of Electrical Engineering students of Qatar University students in Shell Eco Marathon (SEM) competition, which aims at designing and racing energy efficient vehicles. This participation ...
Transparent conducting electrodes based on thin, ultra-long Copper nanowires and graphene nano-composites
(
SPIE
, 2014 , Conference Paper)
High aspect-ratio ultra-long (> 70 ?m) and thin (< 50 nm) copper nanowires (Cu-NW) were synthesized in large quantities using a solution-based approach. The nanowires, along with reduced graphene-oxide sheets, were coated ...