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Performance analysis of cognitive multihop relaying with m-QAM detect-and-forward in Nakagami-m fading channels

Performance analysis of cognitive multihop relaying with m-Q...

引用

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

作者： Mustapha Benjillali Amal Hyadi Daniel Benevides da Costa Mohamed-Slim Alouini Communications Systems Department NPT Rabat Morocco Computer Electrical and Mathematical Science and Engineering (CEMSE) Division King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia Wireless Telecommunications Research Group (GTEL) Federal University of Ceará (UFC) CE Brazil

In this work, we investigate the performance of cognitive multihop regenerative relaying systems in the “underlay” spectrum sharing scenario. The multiple relays perform “detect-and-forward” relaying strategy to convey a message with an order m quadrature amplitude modulation (m-QAM) from the source to the destination over independent but not necessarily identical Nakagami-m fading channels. We adopt a closed-form analysis framework based on univariate and bivariate Meijer G-functions to derive the end-to-end error performance (in terms of bit and symbol error rates), the outage probability, and the ergodic capacity. Various numerical examples are presented to illustrate the results with a large combination of system and fading parameters, and simulation results confirm the accuracy of our closed-form analysis.

关键词： Bit error rate Fading Interference Receivers Signal to noise ratio Relays Wireless communication

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Constant false alarm rate anomaly-based approach for network intrusion detection

Constant false alarm rate anomaly-based approach for network...

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International Symposium on High Capacity Optical Networks and Enabling Technologies, HONET

作者： Rayan AlShaalan Basil AsSadhan Jalal Al-Muhtadi Hesham Bin-Abbas Fathi Abd El-Samie Saleh Alshebeili Deptartment of Electrical Engineering King Saud University Riyadh Sadia Arabia Deptarpment of Computer Science King Saud University Riyadh Sadia Arabia King Abdulaziz City for Science and Technology (KACST) National Technology Innovation Centers Program Riyadh Sadia Arabia KACST-TIC in RF and Photonics for the e-Society (RFTONICS) King Saud University Riyadh Sadia Arabia

With the rapid growth of communication technologies, the widespread use of the Internet, and the recent introduction of e-services, the number of computer network security threats is dramatically increasing. This paper presents an efficient method for anomaly detection in network traffic. In this method, network traffic is decomposed into control and data planes. As the data traffic generation is based on control traffic, the behavior of the two planes is expected to be similar during normal behavior. Therefore, detecting dissimilarity (via cross-correlation) between the traffic of the two planes can indicate an abnormal behavior. Constant and adaptive thresholding techniques have been developed in this paper for the design of a false alarm rate intrusion detection processors. Simulation experiments have been carried out on a real traffic obtained at king Saud university at the end of 2012.

关键词： Correlation computer crime Ports (computers) Floods Intrusion detection Telecommunication traffic

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On the Sum of Squared η-μ Random Variates With Application to the Performance of Wireless Communication Systems

On the Sum of Squared η-μ Random Variates With Application...

引用

IEEE Vehicular technology Conference

作者： Imran Shafique Ansari Ferkan Yilmaz Mohamed-Slim Alouini Computer Electrical and Mathematical Sciences and Engineering (CEMSE) Division at King Abdullah University of Science and Technology (KAUST) Al-Khawarizmi Applied Math. Building (Bldg. #1) Thuwal 23955-6900 Makkah Province Kingdom of Saudi Arabia

ISBN: (纸本)9781467363365

The probability density function (PDF) and cumulative distribution function of the sum of L independent but not necessarily identically distributed squared η-μ variates, applicable to the output statistics of maximal ratio combining (MRC) receiver operating over η-μ fading channels that includes the Hoyt and the Nakagami-m models as special cases, is presented in closed-form in terms of the Fox's H function. Further analysis, particularly on the bit error rate via PDF-based approach, is also represented in closed form in terms of the extended Fox's H function (H). The proposed new analytical results complement previous results and are illustrated by extensive numerical and Monte Carlo simulation results.

关键词： η-μ variates cellular mobile radio systems non-integer parameters diversity maximal ratio combining binary modulation schemes bit error rate Fox's H function Meijer's G function and extended Fox's H function Bit error rate diversity reception Wireless communication systems Mobile radio systems closed forms sums Cumulative distribution function Hydrogen

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Multi-Pair Cognitive Two-Way Relaying and Power Allocation under Imperfect CSI

Multi-Pair Cognitive Two-Way Relaying and Power Allocation u...

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IEEE Vehicular technology Conference

作者： P Ubaidulla Mohamed-Slim Alouini Sonia Aissa Computer Electrical and Mathematical Sciences and Engineering (CEMSE) Division King Abdullah University of Science and Technology (KAUST) Thuwal Makkah Province Saudi Arabia. Institut National de la Recherche Scientifique (INRS) University of Quebec Montreal QC Canada.

ISBN: (纸本)9781467363365

In this paper, we present a robust joint relay precoder design and transceiver power allocation for a cognitive radio network under imperfect channel state information. The secondary (or cognitive) network consists of multiple pairs of single-antenna transceiver nodes and a non-regenerative two-way relay with multiple antennas which aids the intra-pair communication process of the transceiver nodes. The secondary nodes share the spectrum with a licensed primary user (PU) while guaranteeing that the interference to the PU receiver is maintained below a specified threshold. The proposed robust design is based on the minimization of the sum mean-square error (MSE) of the transceiver nodes under constraints on the secondary users' transmit powers and interference to PU the receiver. Though the original problem is non-convex, we show that the proposed design can be solved using alternating optimization of convex subproblems which have analytic or efficient numerical solutions. We illustrate the performance of the proposed designs through some selected numerical simulations.

关键词： transceiver MSE proposed Transceivers Mean square error power splitting Channel state information Plutonium Imperfect Cognitive radio Ganglia multiple antenna Bidirectional Non-Convex

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Impact response measurement of contact lenses 5

Impact response measurement of contact lenses

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5th International Conference on Advanced Micro-Device engineering, AMDE 2013

作者： Watanabe, Kazuhide Miyashita, Naoki Bin, Du Hong Irisa, Kyohei Takita, Akihiro Yamaguchi, Takao Carcasona, Edwin Mitatha, Somsak Fujii, Yusaku Education Program of Electronics and Infomatics Mathematics and Physics Gunma University 1-5-1 Tenjin-cho Kiryu Gunma376-8515 Japan Department of Electronics Faculty of Engineering Gunma University 1-5-1 Tenjin-cho Kiryu Gunma376-8515 Japan Education Program of Mechanical Science and Technology School of Science and Technology Gunma University 1-5-1 Tenjin-cho Kiryu Gunma376-8515 Japan Department of Electronics Graduate School of Engineering Gunma University 1-5-1 Tenjin-cho Kiryu376-8515 Japan Division of Mechanical Science and Technology Faculty of Science and Technology Gunma University 1-5-1 Tenjin-cho Kiryu Gunma376-8515 Japan Department of Mechanical Engineering University of San Carlos Cebu City230-0100 Philippines Hybrid Computing Research Laboratory School of Computer Engineering Faculty of Engineering King Mongkut's Institute of Technology Ladkrabang Chalongkrung Road Bangkok Thailand

ISBN: (纸本)9783038354659

Impact response of contact lenses is measured using the Levitation Mass Method (LMM). In the LMM, a small mass collides with contact lenses and the impact force is measured with high accuracy as the inertial force of the moving part. A pneumatic linear bearing is used to achieve linear motion with sufficiently small friction acting on the moving part. Hysteresis loop and consumed energy as mechanical characteristics of contact lenses are also calculated.. © (2015) Trans Tech Publications, Switzerland.

关键词： Contact lenses

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A Paper Based Inkjet Printed Real Time Location Tracking TAG

A Paper Based Inkjet Printed Real Time Location Tracking TAG

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IEEE/MTT-S International Microwave Symposium

作者： Muhammad F. Farooqui Rana Muhammad Bilal Hammad M. Cheema Atif Shamim IMPACT Lab Electrical Engineering Program King Abdullah University of Science and Technology Thuwal 23955-6900 Kingdom of Saudi Arabia

ISBN: (纸本)9781467361750

This paper presents, for the first time, an inkjet printed, wearable, low-cost, light weight and miniaturized real time locating TAG on an ordinary photo-paper. The 29 grams, 9 cm×8 cm×0.5 cm TAG integrates a GPS/GSM module, a microcontroller with on-paper GPS and GSM antennas. A novel monopole antenna with an L shaped slit is introduced to achieve the required circular polarization for the GPS band. Issues related to integration of active components (e.g. BGA chip) on inkjet-printed paper substrates are discussed. The system enables location tracking through a user-friendly interface accessible through all internet enabled devices. Field tests show an update interval of 15 sec, stationary position error of 6.2m and real time tracking error of 4.7m which is 4 times better than the state-of-the-art. Due to the flexible nature of the paper substrate, the TAG can be designed for different shapes such as a wrist band for child tracking or a collar band for pet tracking applications.

关键词： GPS/GSM inkjet printing localization paper based electronics real time tracking wearable device

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Effective Capacity of Nakagami-m Fading Channels with Full Channel State Information in the Low Power Regime

Effective Capacity of Nakagami-m Fading Channels with Full C...

引用

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications

作者： Fatma Benkhelifa Zouheir Rezki Mohamed-Slim Alouini Computer Electrical and Mathematical Science and Engineering (CEMSE) Division King Abdullah University of Science and Technology (KAUST) Thuwal Makkah Province Saudi Arabia

ISBN: (纸本)9781467362337

The effective capacity have been introduced by Wu and Neji as a link-layer model supporting statistical delay QoS requirements. In this paper, we propose to study the effective capacity of a Nakagami-m fading channel with full channel state information (CSI) at both the transmitter and at the receiver. We focus on the low Signal-to-Noise Ratio (SNR) regime. We show that the effective capacity for any arbitrary but finite statistically delay Quality of Service (QoS) exponent θ, scales essentially as S NR log( 1 /S NR) exactly as the ergodic capacity, independently of any QoS constraint. We also characterize the minimum energy required for reliable communication, and the wideband slope to show that our results are in agreement with results established recently by Gursoy et al.. We also propose an on-off power control scheme that achieves the capacity asymptotically using only one bit CSI feedback at the transmitter. Finally, some numerical results are presented to show the accuracy of our asymptotic results.

关键词： Effective capacity QoS Nakagami-m on-off scheme low SNR

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All Inkjet Printed 3D Microwave Capacitors and Inductors with Vias

All Inkjet Printed 3D Microwave Capacitors and Inductors wit...

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IEEE/MTT-S International Microwave Symposium

作者： G. McKerricher J. Gonzalez A. Shamim Impact Lab Electrical Engineering Program King Abdullah University of Science and Technology Thuwal Makkah 23995-6900 Kingdom of Saudi Arabia

ISBN: (纸本)9781467361750

For the first time we present a method to create all inkjet printed multilayer RF passive components including vias. Although there has been previous work on multilayer RF components, they are not fully inkjet printed and involve complicated processing techniques such as laser cutting, conductive epoxy, or reactive ion etching. This work demonstrates a truly all inkjet printed solution with a novel dissolving method for vias realization. A major issue with inkjet printing is often surface roughness, however by processing these materials at low temperature surface roughness <20nm RMS has been obtained which allows for high quality components to be fabricated and allows for stacked multilayer designs.

关键词： Inkjet printing vias multilayer capacitors inductors Poly 4 (vinyl phenol)

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Ergodic capacity of cognitive radio under imperfect channel-state information

Ergodic capacity of cognitive radio under imperfect channel-...

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作者： Rezki, Zouheir Alouini, Mohamed-Slim Electrical Engineering Program Physical Science and Engineering Division King Abdullah University of Science and Technology Thuwal 23955-6900 Saudi Arabia

A spectrum-sharing communication system where the secondary user is aware of the instantaneous channel-state information (CSI) of the secondary link but knows only the statistics and an estimated version of the secondary transmitter-primary receiver link is investigated. The optimum power profile and the ergodic capacity of the secondary link are derived for general fading channels [with a continuous probability density function (pdf)] under the average and peak transmit power constraints and with respect to the following two different interference constraints: 1) an interference outage constraint and 2) a signal-to-interference outage constraint. When applied to Rayleigh fading channels, our results show, for example, that the interference constraint is harmful at the high-power regime, because the capacity does not increase with the power, whereas at the low-power regime, it has a marginal impact and no-interference performance, which corresponds to the ergodic capacity under average or peak transmit power constraint in the absence of the primary user, may be achieved. © 2012 IEEE.

关键词： Outages

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Photovoltaics: The Complete In‐Gap Electronic Structure of Colloidal Quantum Dot Solids and Its Correlation with Electronic Transport and Photovoltaic Performance (Adv. Mater. 6/2014)

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Advanced Materials 2014年第6期26卷

作者： Khabiboulakh Katsiev Alexander H. Ip Armin Fischer Iori Tanabe Xin Zhang Ahmad R. Kirmani Oleksandr Voznyy Lisa R. Rollny Kang Wei Chou Susanna M. Thon Graham H. Carey Xiaoyu Cui Aram Amassian Peter Dowben Edward H. Sargent Osman M. Bakr Division of Physical Sciences and Engineering Solar and Photovoltaic Engineering Center King Abdullah University of Science and Technology (KAUST) Thuwal 23955–6900 Saudi Arabia Department of Electrical and Computer Engineering University of Toronto Toronto Ontario M5S 3G4 Canada Department of Physics and Astronomy Jorgensen Hall 855 North 16th Street University of Nebraska‐Lincoln Lincoln NE 68588–0299 USA Canadian Light Source Saskatoon SK S7N 2V3 Canada

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