检索结果-内蒙古大学图书馆

IEEE International Conference on communications

作者： Pengwei Zhang Xing Zhang Yan Zhang Yue Gao Zhenhai Zhang Wenbo Wang Wireless Signal Processing and Network Laboratory Key Lab of Universal Wireless Communications Ministry of Education Beijing University of Posts and Telecommunications Beijing China Simula Research Laboratory Norway School of Electronic Engineering and Computer Science Queen Mary University of London London UK

This paper studies the physical layer security in cognitive relay network (CRN) with multiple antennas in the presence of multiple eavesdroppers. Under spectrum sharing scenario and orthogonal space-time block code (OSTBC) transmission, we derive both the exact and asymptotic expressions of secrecy outage probability over Rayleigh fading channels and give the reliability-security tradeoff analysis. The results which have been verified by Monte Carlo simulation show that the loss of the secrecy outage performance caused by an increase of eavesdroppers number can be totally overcome by multiple antenna diversity. It's illustrated that increasing the number of antennas can also improve both reliability and security of the system. Besides, the asymptotic analysis indicates the secrecy diversity order is only determined by number of antennas and is independent with number of eavesdroppers. The secrecy array gain is relevant with both number of antennas and eavesdroppers. In other words, the existence of eavesdroppers will degrade the secrecy outage performance but will not affect the diversity order of the system.

关键词： Security Antennas Physical layer Fading Interference signal to noise ratio Reliability

来源：评论

学校读者我要写书评

暂无评论

Author Correction: The challenge of mapping the human connectome based on diffusion tractography

引用

Nature communications 2019年第1期10卷 5059页

作者： Klaus H Maier-Hein Peter F Neher Jean-Christophe Houde Marc-Alexandre Côté Eleftherios Garyfallidis Jidan Zhong Maxime Chamberland Fang-Cheng Yeh Ying-Chia Lin Qing Ji Wilburn E Reddick John O Glass David Qixiang Chen Yuanjing Feng Chengfeng Gao Ye Wu Jieyan Ma Renjie He Qiang Li Carl-Fredrik Westin Samuel Deslauriers-Gauthier J Omar Ocegueda González Michael Paquette Samuel St-Jean Gabriel Girard François Rheault Jasmeen Sidhu Chantal M W Tax Fenghua Guo Hamed Y Mesri Szabolcs Dávid Martijn Froeling Anneriet M Heemskerk Alexander Leemans Arnaud Boré Basile Pinsard Christophe Bedetti Matthieu Desrosiers Simona Brambati Julien Doyon Alessia Sarica Roberta Vasta Antonio Cerasa Aldo Quattrone Jason Yeatman Ali R Khan Wes Hodges Simon Alexander David Romascano Muhamed Barakovic Anna Auría Oscar Esteban Alia Lemkaddem Jean-Philippe Thiran H Ertan Cetingul Benjamin L Odry Boris Mailhe Mariappan S Nadar Fabrizio Pizzagalli Gautam Prasad Julio E Villalon-Reina Justin Galvis Paul M Thompson Francisco De Santiago Requejo Pedro Luque Laguna Luis Miguel Lacerda Rachel Barrett Flavio Dell'Acqua Marco Catani Laurent Petit Emmanuel Caruyer Alessandro Daducci Tim B Dyrby Tim Holland-Letz Claus C Hilgetag Bram Stieltjes Maxime Descoteaux Division of Medical Image Computing German Cancer Research Center (DKFZ) Heidelberg 69120 Germany. k.maier-hein@dkfz.de. Division of Medical Image Computing German Cancer Research Center (DKFZ) Heidelberg 69120 Germany. Sherbrooke Connectivity Imaging Lab (SCIL) Université de Sherbrooke Sherbrooke QC J1K 0A5 QC Canada. Department of Intelligent Systems Engineering School of Informatics and Computing Indiana University Bloomington IN 47408 USA. Krembil Research Institute University Health Network Toronto Canada M5G 2C4. Department of Neurological Surgery University of Pittsburgh School of Medicine Pittsburgh PA 15213 USA. IMT-Institute for Advanced Studies Lucca 55100 Italy. Department of Diagnostic Imaging St. Jude Children's Research Hospital Memphis TN 38105 USA. University of Toronto Institute of Medical Science Toronto Canada M5S 1A8. Institute of Information Processing and Automation Zhejiang University of Technology Hangzhou 310023 Zhejiang China. United Imaging Healthcare Co Shanghai 201807 China. Shanghai Advanced Research Institute Shanghai 201210 China. Laboratory of Mathematics in Imaging Harvard Medical School Boston MA 02215 USA. Center for Research in Mathematics Guanajuato 36023 Mexico. PROVIDI Lab Image Sciences Institute University Medical Center Utrecht Utrecht 3508 The Netherlands. Cardiff University Brain Research Imaging Centre School of Psychology Cardiff University Maindy Road Cardiff CF24 4HQ UK. Department of Radiology University Medical Center Utrecht Utrecht 3508 The Netherlands. Centre de recherche institut universitaire de geriatrie de Montreal (CRIUGM) Université de Montréal Montreal QC Canada H3W 1W5. Sorbonne Universités UPMC Univ Paris 06 CNRS INSERM Laboratoire d'Imagerie Biomédicale (LIB) 75013 Paris France. Center for Advanced Research in Sleep Medicine Hôpital du Sacré-Coeur de Montréal Montreal Canada H4J 1C5. Neuroimaging Unit Institute of Bioimaging and Molecular Physiology (IBFM) Nat

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Transmitter-side antennas correlation in SVD-assisted MIMO systems

Communications in Computer and Information Science

引用

communications in computer and Information science 2014年 456卷 402-417页

作者： Ahrens, Andreas Cano-Broncano, Francisco Benavente-Peces, ĆEsar Department of Electrical Engineering and Computer Science Communications Signal Processing Group Hochschule Wismar University of Technology Business and Design Philipp-M¨uller-Strase 14 Wismar23966 Germany E.T.S. de Ingeniería y Sistemas de Telecomunicación Universidad Politécnica de Madrid Ctra. Valencia. km. 7 Madrid28031 Spain

ISBN: (纸本)9783662447871

MIMO techniques allow increasing wireless channel performance by decreasing the BER and increasing the channel throughput and in consequence are included in current mobile communication standards. MIMO techniques are based on benefiting the existence of multipath in wireless communications and the application of appropriate signal processing techniques. The singular value decomposition (SVD) is a popular signal processing technique which, based on the perfect channel state information (PCSI) knowledge at both the transmitter and receiver sides, removes inter-antenna interferences and improves channel performance. Nevertheless, the proximity of the multiple antennas at each front-end produces the so called antennas correlation effect due to the similarity of the various physical paths. In consequence, antennas correlation drops the MIMO channel performance. This investigation focuses on the analysis of a MIMO channel under transmitter-side antennas correlation conditions. First, antennas correlation is analyzed and characterized by the correlation coefficients. The analysis describes the relation between antennas correlation and the appearance of predominant layers which significantly affect the channel performance. Then, based on the SVD, pre- and post-processing is applied to remove inter-antenna interferences. Finally, bit- and power allocation strategies are applied to reach the best performance. The resulting BER reveals that antennas correlation effect diminishes the channel performance and that not necessarily all MIMO layers must be activated to obtain the best performance. © Springer-Verlag Berlin Heidelberg 2014.

关键词： Singular value decomposition

来源：评论

学校读者我要写书评

暂无评论

On the performance of hybrid satellite-terrestrial cooperative networks with interferences 48

On the performance of hybrid satellite-terrestrial cooperati...

引用

48th Asilomar Conference on signals, Systems and computers, ACSSC 2015

作者： Lin, Min Ouyang, Jian Zhu, Wei-Ping PLA University of Science and Technology Nanjing210007 China National Mobile Communications Research Laboratory Southeast University Nanjing210096 China Institute of Signal Processing and Transmission Nanjing University of Posts and Telecommunications Nanjing210003 China Department of Electrical and Computer Engineering Concordia University MontrealQCH3G1M8 Canada

ISBN: (纸本)9781479982974

The paper investigates the performance of a hybrid satellite-terrestrial cooperative network (HSTCN), where some terrestrial amplify-and-forward (AF) relays are employed to assist the signal transmission from a satellite to a destination, which is corrupted by multiple co-channel interferences (CCIs). In this system, the satellite links undergo Shadowing-Rician fading while the terrestrial links experience Rayleigh fading. Specifically, by assuming that maximum ratio combining (MRC) is used at the destination, we first derive the moment generating function (MGF) of the output signal-to-interference-plus-noise ratio (SINR). With the help of MGF, we then present the analytical average symbol error rate (ASER) expression for the considered cooperative system. Moreover, to gain further insights, the asymptotic ASER analysis in terms of the diversity order and array gain is also developed. Finally, numerical results are given to demonstrate the validity of the performance analysis and the impacts of shadowing parameters, relay number and CCIs on the considered HSTCN. © 2014 IEEE.

关键词： Rayleigh fading

来源：评论

学校读者我要写书评

暂无评论

Multiple access communications 7th international workshop, MACOM 2014 Halmstad, Sweden, august 27-28, 2014 proceedings 10

Multiple access communications 7th international workshop, M...

引用

10th European Workshop on Public Key Infrastructures, Services and Applications, EuroPKI 2013

作者： Jonsson, Magnus Vinel, Alexey Bellalta, Boris Belyaev, Evgeny Halmstad University School of Information Science Computer and Electrical Engineering Kristian IV:s väg 3 Halmstad Sweden Universitat Pompeu Fabra Department of Information and Communication Technologies Roc Boronat 138 Barcelona Spain Tampere University of Technology Department of Signal Processing Korkeakoulunkatu 3 Tampere Finland

来源：评论

学校读者我要写书评

暂无评论

Multiple-frequency adaptive antenna processing over imperfect ground planes

Multiple-frequency adaptive antenna processing over imperfec...

引用

Antennas and Propagation Society International Symposium

作者： Walid Dyab Dojana Salama Tapan. K. Sarkar Magdalena Salazar-Palma Department of Electrical Engineering and Computer Science Syracuse University Syracuse New York USA Department of Signal Theory & Communications Universidad Carlos III de Madrid Leganes Madrid Spain

This paper illustrates a method to carry out adaptive processing simultaneously at multiple frequencies using the same antenna array located over imperfect ground planes. First, it is shown how to transform an array situated over an imperfect ground to a uniformly spaced array of point radiators. Then, a direct data domain least squares (D3LS) method is used to extract the signal-of-interest (SOI) in the presence of jammer and clutter simultaneously at multiple frequencies, using a single snap shot of the data.

关键词： Arrays Vectors Adaptive arrays Multifrequency antennas Antenna measurements Voltage measurement

来源：评论

学校读者我要写书评

暂无评论

Dynamical Evaluation Of Academic Performance In E-learning Systems Using Neural Networks Modeling (Time Response Approach)

Dynamical Evaluation Of Academic Performance In E-learning S...

引用

IEEE Global engineering Education Conference

作者： Hassan M. H. Mustafa Ayoub Al-Hamadi Nosipho Dladlu Nada M. Al-Shenawy Eyas El-Qwasmeh Computer Engineering Department Faculty of Engineering Al-Baha University Institute for Electronics Signal Processing and Communications (IESK) Otto-von-Guericke-University Department of Computer Science Faculty of Agriculture Science and Technology North West University Computer and Control Department Faculty of Engineering Tanta University Department of information systems College of Computer & Information Sciences King Saud University

ISBN: (纸本)9781479931927

This paper explores a relatively new methodological approach for the field integrating learning and education, with other research areas, such as neurobiological, cognitive, and computational sciences. Specifically, presented work is an interdisciplinary piece of research aiming to simulate appropriately a challenging and critical issue concerned with academic performance in e-learning systems. Namely, considering face to face tutoring phenomenon observed while an interactive e-learning process is performed. Referring to strong interest announced by educationalists to know how neurons' synapses inside the brain are interconnected. Together to perform communication processing among brain regions. Herein, a special attention has been developed towards dynamical academic evaluation of timely based brain learning via face to face (FTF) interactive tutoring. In other words, this piece of research presents an interdisciplinary realistic dynamic investigation. For academic performance phenomenon associated with e-learners' contribution as time response performed human's brain neuronal function. Accordingly, Artificial Neural Networks (ANN~s) have been adopted for realistic modeling of academic performance evaluation based on timely dependant student's response till attaining learning convergence (desired output). After running of designed realistic simulation program, some interesting results have been presented. Interestingly, individual differences' phenomenon observed via after statistical analysis of obtained simulation results.

关键词： Artificial neural network modeling E-Learning Performance Evaluation Synaptic Connectivity Multiple choice questions

来源：评论

学校读者我要写书评

暂无评论

Beamforming antennas for 60 GHz positioning systems

Beamforming antennas for 60 GHz positioning systems

引用

European Conference on Antennas and Propagation, EuCAP

作者： Anna Papió Papió Toda Jordi Romeu Lluís Jofre Franco De Flaviis Electrical Engineering and Computer Science Dept. University of California Irvine California USA Department of Signal Theory and Communications Universitat Politècnica de Catalunya Barcelona Spain

In this paper we analyze the benefit of using phased arrays as the receiving antennas of indoor location systems. A 60 GHz code division multiple access carrier-based ultra-wide band positioning system for the simultaneous location of diverse markers is considered. The positioning error in an indoor environment is assessed when omnidirectional antennas are used at the receiving sensors and when they are substituted by beamforming antennas. Results show that beamforming systems can effectively mitigate the multipath effects and achieve positioning accuracies close to those achievable in free space scenarios. The performance of omnidirectional systems is severely degraded by multipath and multiple access interference.

关键词： Receiving antennas Accuracy Array signal processing Sensors

来源：评论

学校读者我要写书评

暂无评论

On the performance of hybrid satellite-terrestrial cooperative networks with interferences

On the performance of hybrid satellite-terrestrial cooperati...

引用

Asilomar Conference on signals, Systems & computers

作者： Min Lin Jian Ouyang Wei-Ping Zhu National Mobile Communications Research Laboratory Southeast University Nanjing P.R. China PLA University of Science and Technology Nanjing P.R. China Institute of Signal Processing and Transmission Nanjing University of Posts and Telecommunications Nanjing P.R. China Department of Electrical and Computer Engineering Concordia University Montreal QC Canada

ISBN: (纸本)9781479982981

关键词： Relays Satellites signal to noise ratio Fading Cooperative systems Shadow mapping Modulation

来源：评论

学校读者我要写书评

暂无评论

Pattern synthesis for sparse MIMO radar arrays using multistage Genetic Algorithm

引用

Journal of Information and Computational science 2013年第18期10卷 6139-6150页

作者： He, Jie Feng, Dazheng Younan, N.H. Ma, Lun School of Information Engineering Chang'an University Xi'an 710064 China National Lab. of Radar Signal Processing Xidian University Xi'an 710071 China Department of Electrical and Computer Engineering Mississippi State University MS 39762 United States

Ambiguities, grating lobs, caused by high sparseness of array significantly degrade the performance of pattern synthesis for Multiple-input Multiple-output (MIMO) radar systems. In this paper, the optimization of sparse array pattern synthesis for orthogonal MIMO radar is presented based on multistage Genetic Algorithm (GA). Upon simultaneously optimizing the geometries of transmit and receive antennas, maximum Degrees of Freedom (DOF) and low grating lobs level can be obtained in our research. Numerical examples are provided to demonstrate the effectiveness of the proposed method. © 2013 Binary Information Press.

关键词： Genetic algorithms

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：