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IEEE International Conference on Telecommunications and Malaysia communications (ICT-MICC)

作者： Ali Raed Faisal Fazirulhisyam Hashim Mahamod Ismail Nor Kamariah Noordin Department of Computer and Communication Systems Engineering Universiti Putra Malaysia Selangor Malaysia Department of Electrical Electronic and System Engineering Universiti Kebangsaan Malaysia Selangor Malaysia

Downlink joint processing (JP) between base stations eliminates the inter-cell interference in a cellular system with a frequency reuse factor of one and improves the spectral efficiency of cell-edge users. JP has a huge impact on both feedback and backhaul load, and thus partial JP was presented to tackle with signaling demand. However, achieving equivalent backhaul reduction based on limited feedback channel state information is challenging when linear techniques, such as zero-forcing beamforming (BF) are used, which led to the use of stochastic algorithms instead. Therefore stochastic multi-start particle swarm optimization algorithm (MSPSOA) is proposed in this paper to achieve backhaul reduction and address the issue of lack of diversity, which is related to the basic particle swarm optimization algorithm (BPSOA). The lack of diversity has been solved in this work by replacing the inactive particles adaptively based on a predefined constant which represents the difference between local best and global best optimization criterion. The performance of the proposed MSPSOA and BPSOA BF is evaluated with respect to full and partial JP using different metrics such as sum-rate, actual interference and convergence using a multipath realistic environment WINNER II channel model. The proposed MSPSOA outperforms BPSOA in terms of average sum-rate by 15.3%, while the actual interference decreased by 14.6% in some conducted scenarios.

关键词： Interference Particle swarm optimization Stochastic processes Optimization Resource management Array signal processing Downlink

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A Novel Massive MIMO Precoding Scheme for Next Generation Heterogeneous Networks

A Novel Massive MIMO Precoding Scheme for Next Generation He...

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IEEE Global communications Conference

作者： Fengye Zhang Songlin Sun Bo Rong Fei Richard Yu Kejie Lu School of Information and Communication Engineering Beijing University of Posts and Telecommunications Communications Research Centre Department of System and Computer Engineering School of Information Carleton University Department of Electrical and Computer Engineering University of Puerto Rico at Mayaguez

ISBN: (纸本)9781479959532

Heterogeneous network (HetNet) is a promising technology to improve the capacity of future generations of cellular network, in which a mobile station can be served by multiple base stations (BSs) with different scales of coverage range, including short range low power nodes (LPNs). In HetNet, a major challenge is how to provide guaranteed quality-of-service (QoS) for all users. To address this issue, we investigate a practical scenario in which the massive multiple-input multiple-output (MIMO) technology is adopted by the cooperation of one macro-cell BS and several LPNs. Furthermore, we provide a lightweight channel state information (CSI) acquisition scheme for the implementation. Numerical simulation results demonstrate that the signal-to-interference-and noise ratio (SINR) of intended users in LPNs covered with small cells can be significantly increased by this proposed massive MIMO precoding scheme, whereas oppressing the impact on neighboring victim users.

关键词： Massive MIMO HetNets Precoding Channel estimation prediction coding channel estimation multiple input multiple output systems Heterogeneous networks mobile station

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Performance Study of Relay Coordination Schemes for Two-Hop Networks: Two-Cell Case

Performance Study of Relay Coordination Schemes for Two-Hop ...

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IEEE International Conference on communications

作者： Kasun T. Hemachandra Norman C. Beaulieu Department of Electrical and Computer Engineering University of Alberta School of Information and Communication Engineering and the Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications

ISBN: (纸本)9781467364300

The outage probability of a two-hop coordinated decode-and-forward relay network is investigated. Relay coordination is performed only with the dominant interferer. Different levels of network coordination are studied and their performances are compared. Exact expressions are derived for the outage probability of a particular mobile user for each coordination scheme. Asymptotic outage probability is derived to identify the diversity and coding gains for each coordination scheme.

关键词： Cochannel interference Decode-and-forward Outage probability Relay coordination Zero-forcing

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PrimeTime web-based report analyzer (PTWRA) tool

PrimeTime web-based report analyzer (PTWRA) tool

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Asia Symposium on Quality Electronic Design, ASQED

作者： Fawaz Mohammed Jumaah Sreedharan Baskara Roslina Mohd Sidek Fakhrul Zaman Rokhani Department of Computer and Communication Engineering Smart Systems and System-on-Chip (S3oC) Research Group Universiti Putra Malaysia Malaysia Intelligent Circuits Engineering

In modern VLSI designs, timing closure has become a challenging and tedious task for the designers due to the fact that the number of design logic gates led to an exponential increase in the number of timing paths. PrimeTime from Synopsys is used to perform Static Timing Analysis and to generate a timing report in the form of large size text file; hence, data analysis is a complex task for the designer. This work presents a web-based text-mining software tool based on text-mining and web-based reporting techniques. It consists of two parts, the Perl software parser file in the user part, while MySQL and Apache servers in the server part. This tool parses Synopsys PrimeTime timing report and provides analysis services for team collaboration, clock skew and path constraints calculations, paths categorization and paths distribution in well-organized tables, and presents data on website pages.

关键词： Clocks Servers Design automation Very large scale integration Delays Data mining

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SOA-based framework for home and building automation systems (HBAS)

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International Journal of Smart Home 2014年第5期8卷 197-206页

作者： Perumal, Thinagaran Ramli, Abd Rahman Leong, Chui Yew Department of Computer Science Faculty of Computer Science and Information Technology Universiti Putra Malaysia Malaysia Department of Computer and Communication System Engineering Faculty of Engineering Universiti Putra Malaysia Malaysia

Home and building automation systems (HBAS) today are categorized by plethora of data formats, communication platforms and software services accessible via heterogeneous embedded devices. These heterogeneous embedded devices characterized a building into a data intensive entity, generating numerous data and complex control information, brings a much heavy load to the HBAS. Consequently, this leads to interoperation difficulties among those devices for information exchange and operation management. In this paper, a Service Oriented Architecture (SOA) based framework that leveraged by services is proposed to manage HBAS efficiently by reducing their workload during joint execution of tasks. The proposed framework consists of several layers dedicated for services interwoven by Event-Condition-Action (ECA) oriented decision mechanism for managing heterogeneous embedded devices. The proposed framework is viable and highly efficient to be deployed for HBAS with limited computing resources. © 2014 SERSC.

关键词： Interoperability

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Performance Analysis of DF Relaying with Optimum Combining in a Poisson Field of Interferers

Performance Analysis of DF Relaying with Optimum Combining i...

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IEEE International Conference on communications

作者： Navod Suraweera Norman C. Beaulieu Department of Electrical and Computer Engineering University of Alberta School of Information and Communication Engineering and Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecomunications (BUPT)

ISBN: (纸本)9781467364300

The performance of optimum combining (OC) in decode-and forward (DF) relaying in the presence of a Poisson field of interferers is analyzed. An approximation for the outage probability of the OC receiver is derived by considering the temporal correlation of the interference. Despite the randomness of the number and the locations of the interferers, the OC receiver suppresses the interference at the destination node and diversity gains are achieved, provided that the relay nodes are noise limited. For single-antenna relay nodes, the end-to-end performance is vulnerable to interference at the relay nodes which is not canceled, resulting in zero diversity gains.

关键词： DF relaying Interference Optimum combining Outage probability Poisson point processes

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Optimization on the preparation of microfluidic channel using dry film resist

Optimization on the preparation of microfluidic channel usin...

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International Conference on Smart Sensors and Application (ICSSA)

作者： Firdaus Kamuri Zurina Zainal Abidin Nurul Amziah Md Yunus Mohd Nizar Hamidon Mohd Hanif Yaacob Suryani Kamarudin Siti Zalikha Zhukhi Department of Chemical and Environmental Engineering Universiti Putra Malaysia Selangor Malaysia Department of Electrical and Electronic Engineering Universiti Putra Malaysia Selangor Malaysia Department of Computer and Communication System Engineering Universiti Putra Malaysia Selangor Malaysia

In this work, microfluidic channel was explored using dry film resist (DFR) method. Many of previous studies used SU-8 and PDMS as the medium to fabricate microfluidic channel for making a microfluidic chamber. Microscope slides were used as the substrate for the applications with bio components since it is inert and stable. The DFR serves to be the spacer to form the channel. Several processes which include cleaning, drying, prebaking, laminating, UV exposure and finally post-baking were involved in channel making. These processes need to be optimized in order to obtain a good chamber. Silicon rubber and UV glue were used to seal the chamber system to prevent any leakages.

关键词： Microfluidics Substrates Resists Films Glass Fabrication Microchannels

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Performance evaluation of the electromagnetic behavior of the bundle SWCNTs with circular geometry

Performance evaluation of the electromagnetic behavior of th...

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IEEE International Conference on Electronics, Computing and communication Technologies (CONECCT)

作者： M. F. Malek Yaseen Naser Jurn Sawsen Abdulahadi Mahmood Abeer Tariq Maolood School of Electrical System Engineering Universiti Malaysia Perlis (UniMap) / Perlis Malaysia School of Computer and Communication Engineering Universiti Malaysia Perlis (UniMap) / Perlis Malaysia Computer Science Department / College of Education University of Mustansiriyah / Baghdad Iraq Computer Science Department University of Technology / Baghdad Iraq

ISBN: (纸本)9781479999866

This paper presented for the purpose of study and estimates the fundamental electromagnetic properties of the bundle of single-walled carbon nanotubes with circular geometrical structure. The bundle of single-walled carbon nanotubes (SWCNTs) dipole antenna will be employed for this purpose by using Drude method at THz frequency range. The armchair-single-walled carbon nanotube (armchair- SWCNTs) will be utilized in this work, Due to their metallic conducting properties, in order to configure the bundle of SWCNTs. The bundle that will be investigated in the current work is filled by identical SWCNTs having the same radius and same length. The radiation pattern, s11 parameters and antenna directivity of bundle SWCNTs dipole antenna are presented in this paper. Based on the performance evaluation presented in this paper, the bundle of SWCNT dipole antenna is a good candidate for the nano-antenna application instead of SWCNT dipole antenna. Also, the problem that associated with SWCNT dipole antenna can be reduced by the bundle. All results in this work explained that the bundle of SWCNTs can be used to design bundle of SWCNTs dipole antenna in a wide THz frequency band. The performance of this dipole antenna will be evaluated by using computer Simulation Technology (Microwave studio) CST (MWS), which presents and analyses the key parameters of the antenna.

关键词： Dipole antennas Impedance Conductivity Carbon nanotubes Resonant frequency Software packages

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A weighted hard combination scheme for cooperative spectrum sensing in cognitive radio sensor networks

A weighted hard combination scheme for cooperative spectrum ...

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IEEE International Conference on Telecommunications and Malaysia communications (ICT-MICC)

作者： I. Mustapha Borhanuddin M. Ali Mohd F. A. Rasid A. Sali H. Mohamad Department of Computer and Communication System Engineering Universiti Putra Malaysia Serdang Selangor Malaysia Wireless Networks and Protocol Research Lab MIMOS Berhad Technology Park Malaysia Kuala Lumpur Malaysia

Multi-user spatial sensing diversity exploration through cooperation spectrum sensing greatly improves sensing performance. However, high communication overhead and energy costs for exchanging sensing results may limit its viability in a realistic large scale resource constraint network such as cognitive radio wireless sensor networks. This paper presents a Weighted Hard Combination (WHC) scheme that combines features of both quantized and hard combining schemes to minimize energy cost for reporting sensing result and improve primary user detection performance in cooperative sensing. We evaluate the effectiveness of the scheme through simulation. Performance comparison of the WHC scheme in terms of detection performance, reporting energy cost and reporting time ratio with conventional hard combination, soft combination and quantized schemes indicates viability of the scheme. The results indicate that the WHC scheme minimizes reporting energy cost by 70% and improves detection performance by 5.6% compared to the quantized 3-bits scheme.

关键词： Sensors Cognitive radio Wireless sensor networks Diversity reception Signal to noise ratio Interference

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25th Annual Computational Neuroscience Meeting CNS-2016, Seogwipo City, South Korea, July 2-7, 2016 Abstracts

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BMC NEUROSCIENCE 2016年第1期17卷 1-112页

作者： [Anonymous] Computational Neurobiology Laboratory The Salk Institute for Biological Studies San Diego USA UNIC CNRS Gif sur Yvette France The European Institute for Theoretical Neuroscience (EITN) Paris France ATR Computational Neuroscience Laboratories Kyoto Japan Krembil Research Institute University Health Network Toronto Canada Department of Physiology University of Toronto Toronto Canada Department of Medicine (Neurology) University of Toronto Toronto Canada Department of Physics University of New Hampshire Durham USA Department of Neurophysiology Nencki Institute of Experimental Biology Warsaw Poland Department of Theory Wigner Research Centre for Physics of the Hungarian Academy of Sciences Budapest Hungary Department of Mathematical Sciences KAIST Daejoen Republic of Korea Department of Mathematics University of Houston Houston USA Department of Biochemistry & Cell Biology and Institute of Biosciences and Bioengineering Rice University Houston USA Department of Biology and Biochemistry University of Houston Houston USA Grupo de Neurocomputación Biológica Dpto. de Ingeniería Informática Escuela Politécnica Superior Universidad Autónoma de Madrid Madrid Spain Department of Biological Sciences University of Southern California Los Angeles USA Center for Neuroscience Korea Institute of Science and Technology Seoul South Korea Department of Neurology Albert Einstein College of Medicine Bronx USA Center for Neuroscience KIST Seoul South Korea Department of Neuroscience University of Science and Technology Daejon South Korea Systems Neuroscience Group QIMR Berghofer Medical Research Institute Herston Australia Department of Psychology Yonsei University Seoul South Korea Department of Psychiatry Kyung Hee University Hospital at Gangdong Seoul South Korea Department of Psychiatry Veterans Administration Boston Healthcare System and Harvard Medical School Brockton USA Department of Electrical and Electronic Engineering The University of Melbourne Parkvil

A1 Functional advantages of cell-type heterogeneity in neural circuits Tatyana O. Sharpee A2 Mesoscopic modeling of propagating waves in visual cortex Alain Destexhe A3 Dynamics and biomarkers of mental disorders Mitsuo Kawato F1 Precise recruitment of spiking output at theta frequencies requires dendritic h-channels in multi-compartment models of oriens-lacunosum/moleculare hippocampal interneurons Vladislav Sekulić, Frances K. Skinner F2 Kernel methods in reconstruction of current sources from extracellular potentials for single cells and the whole brains Daniel K. Wójcik, Chaitanya Chintaluri, Dorottya Cserpán, Zoltán Somogyvári F3 The synchronized periods depend on intracellular transcriptional repression mechanisms in circadian clocks. Jae Kyoung Kim, Zachary P. Kilpatrick, Matthew R. Bennett, Kresimir Josić O1 Assessing irregularity and coordination of spiking-bursting rhythms in central pattern generators Irene Elices, David Arroyo, Rafael Levi, Francisco B. Rodriguez, Pablo Varona O2 Regulation of top-down processing by cortically-projecting parvalbumin positive neurons in basal forebrain Eunjin Hwang, Bowon Kim, Hio-Been Han, Tae Kim, James T. McKenna, Ritchie E. Brown, Robert W. McCarley, Jee Hyun Choi O3 Modeling auditory stream segregation, build-up and bistability James Rankin, Pamela Osborn Popp, John Rinzel O4 Strong competition between tonotopic neural ensembles explains pitch-related dynamics of auditory cortex evoked fields Alejandro Tabas, André Rupp, Emili Balaguer-Ballester O5 A simple model of retinal response to multi-electrode stimulation Matias I. Maturana, David B. Grayden, Shaun L. Cloherty, Tatiana Kameneva, Michael R. Ibbotson, Hamish Meffin O6 Noise correlations in V4 area correlate with behavioral performance in visual discrimination task Veronika Koren, Timm Lochmann, Valentin Dragoi, Klaus Obermayer O7 Input-location dependent gain modulation in cerebellar nucleus neurons Maria Psarrou, Maria Schilstra, Neil Davey, Benjamin Torben-Ni

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