Electrical Engineering: المرسلات الحديثة
السجلات المعروضة 1201 -- 1220 من 2643
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Performance analysis of relay selection schemes in underlay cognitive networks with imperfect channel state information
( IEEE Computer Society , 2013 , Conference Paper)Cognitive Radio (CR) aims to improve spectrum utilization by allowing unlicensed users to access the licensed spectrum and to coexist with primary user (PU) while respecting the PU's restrictions. An interesting case to ... -
Interference management schemes with general order statistics and interference constraint for multi-user cooperative wireless networks
( Institute of Electrical and Electronics Engineers Inc. , 2013 , Conference Paper)In this paper, two cooperative communications schemes with interference management are proposed for multiuser wireless networks. The first scheme (Interference Constraint based Relay Selection (ICRS)) maximizes the received ... -
Priority-based zero-forcing in spectrum sharing cognitive systems
( IEEE , 2013 , Article)We consider a spectrum sharing scenario between cognitive radio (CR) users and a licensed primary user (PU), in which the PU is not able to successfully transmit data to its destined receiver. The cognitive base station ... -
On hierarchical network coding versus opportunistic user selection for two-way relay channels with asymmetric data rates
( IEEE , 2013 , Article)We address in this paper the challenge of coping with asymmetric data rates in two-way relay channels. We consider a relay network comprising two sources and one relay. The sources communicate at different rates through ... -
Performance analysis of relay selection schemes in OFDM-based underlay cognitive networks
( IEEE , 2013 , Conference Paper)Cognitive radio (CR) is a promising technology that allows wireless systems to sense the environment and learn from previous experience to improve the communication quality. However, CR needs a flexible and adaptive physical ... -
Prior zero forcing for cognitive relaying
( IEEE , 2013 , Article)Relaying primary signals by cognitive base-stations (CBSs) can help the primary system and thus win CBSs a higher chance to transmit their own signals. For this purpose, conventional zero-forcing (CZF) beamforming is a ... -
Performance analysis of selective cooperation in amplify-and-forward relay networks over identical Nakagami-m channels
( Wiley Online Library , 2013 , Article)In cooperative communications, multiple relays between a source and a destination can increase the diversity gain. Because all the nodes must use orthogonal channels, multiple-relay cooperation becomes spectrally inefficient. ... -
Area spectral efficiency of underlay cognitive radio transmission over rayleigh fading channels
( IEEE , 2013 , Conference Paper)Cognitive radio is a promising technology to improve the spectrum utilization by allowing the unlicensed (secondary) user share a frequency bandwidth with the licensed (primary) owner under the condition that no harmful ... -
Life is engineering program: Impact of an engineering outreach project in K-12
( IEEE , 2013 , Conference Paper)The demand for qualified national engineers is high in Qatar; Currently, a wide gap in supply exists. Consequently, urgent and proactive interventions at K-12 level to promote engineering profession to school students are ... -
Multi-resampling Doppler compensation in cooperative underwater OFDM systems
( IEEE , 2013 , Conference Paper)We consider a multi-carrier cooperative underwater acoustic communication (UWAC) system and investigate the Doppler scaling problem arising due to the motion of different nodes. Specifically, we assume an orthogonal frequency ... -
From global to local: Investigation of necessary engineering skills for KBE transformation in Qatar in the context of global engineering attributes
( IEEE , 2013 , Conference Paper)this paper provides the findings of a study on investigating the required contextual engineering skills in Qatar in light of the global engineering skills. A set of 20 attributes were identified in the literature, and ... -
Skills of engineers in knowledge based economies: A comprehensive literature review, and model development
( IEEE , 2013 , Conference Paper)Recent studies emphasize the needs of a wider set of skills engineers require than ever thought. In this paper, authors report on a systematic literature review on this issue. Findings of the review are spanned over two ... -
Modeling and analysis of an infrastructure service request queue in multichannel V2I communications
( Institute of Electrical and Electronics Engineers Inc. , 2014 , Article)This paper presents a concise yet comprehensive description of a multichannel vehicle-to-infrastructure communication system. Existing mathematical models for such a system overlook some of its essential behavioral ... -
Asymptotic BER analysis of FSO with multiple receive apertures over M-distributed turbulence channels with pointing errors
( Optical Society of American (OSA) , 2014 , Article)In this paper, we consider a free-space optical (FSO) communication with multiple receive apertures over M-distributed turbulence channels with pointing errors. In particular, we consider two different combining schemes ... -
On ergodic capacity of wireless transmission subject to poisson distributed interferers over rayleigh fading channels
( IEEE , 2013 , Conference Paper)Poisson point process has been widely adopted in the analysis of co-channel interference in dense frequency reuse systems. With the decaying power law, the aggregate co-channel interference in Poisson field can be viewed ... -
Outage performance of cooperative systems under IQ imbalance
( 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 ... -
Systemic framework of competencies of 21st century technical and engineering human resource: A development case for a knowledge based Economy in Qatar
( IEEE , 2013 , Conference Paper)The required talent of 21st century engineering and technology human resource is significantly different and more complex than what has been needed ever before. Numerous relevant studies have been conducted during the last ... -
Performance analysis of OFDMA based wireless cooperative networks with interference management
( IEEE , 2013 , Conference Paper)In this paper, two cooperative communications schemes with interference management are proposed for orthogonal frequency division multiple access (OFDMA) based wireless networks. The first scheme maximizes the received ... -
Outage performance of OFDM-based relaying systems under IQ imbalance
( IEEE , 2013 , Conference Paper)In the presence of different IQ imbalance (IQI) levels in the different nodes of a cooperative system, it becomes necessary to investigate the effect of each imbalance parameter on the performance. In this contribution, ... -
Engineering economics: Literature review and recommendations for practitioners
(2013 , Conference Paper)The paper provides a review of the curriculum and pedagogy of engineering economics course, which is normally taken by engineering students of different disciplines. Literature reviews of studies and courses syllabuses on ...