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检索条件"机构=Microelectronics System Design Laboratory-Department of Electrical and Systems Engineering"

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Robust design of IRS-Aided Multi-Group Multicast system With Imperfect CSI

Robust Design of IRS-Aided Multi-Group Multicast System With...

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作者： Jiang, Weiheng Xiong, Peiyun Nie, Jiangtian Ding, Zhiguo Pan, Cunhua Xiong, Zehui Chongqing University School of Microelectronics and Communication Engineering Chongqing400044 China Nanyang Technological University School of Computer Science and Engineering Jurong West639798 Singapore Khalifa University Department of Electrical Engineering and Computer Science Abu Dhabi United Arab Emirates The University of Manchester Department of Electrical and Electronic Engineering ManchesterM13 9PL United Kingdom Southeast University National Mobile Communications Research Laboratory Nanjing211189 China Singapore University of Technology and Design Pillar of Information Systems Technology and Design Tampines487372 Singapore

In this paper, the robust design for the intelligent reflective surface (IRS) assisted wireless multi-group multicast system is considered, in which two optimization design problems under two different channel state information (CSI) error models are separately discussed, i.e., the fairness-based problems and the quality-of-service (QoS)-based problems for both the bounded CSI error model and the statistical CSI error model. In order to deal with the non-convex constraints of the considered problems, i.e., bounded CSI error based constraint and statistical CSI error based constraint, S-procedure is adopted to convert the non-convex SINR constraint with bounded CSI error into linear matrix inequalities (LMIs), and the Bernstein-type inequality is utilized to transform the outage probability constraint with statistical CSI error into a second-order cone (SOC) constraint and linear inequalities. Following that, two efficient algorithms based on alternate optimization (AO) are proposed to solve the fairness problems and QoS problems, wherein the semi-definite programming (SDP), penalty convex-concave procedure (CCP) and semi-definite relaxation (SDR) are utilized. Furthermore, we analyze the complexity of the proposed algorithms. Finally, some numerical simulation results are presented to verify the effectiveness of the proposed algorithms, and the impacts of the CSI error and the discrete precision of IRS reflection phase shift on the system performance are analyzed, which provides some insights for the IRS deployment and system robust design. © 2002-2012 IEEE.

关键词： Beamforming

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Novel Radio Frequency Energy Harvesting model

Novel Radio Frequency Energy Harvesting model

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International Power engineering and Optimization Conference (PEOCO)

作者： Hossam Mahmoud Gamal ElDin Mohammed ElAnzeery Mohamed Abd ElAziz Saad ElBagouri Rafik Guindi Department of Microelectronics System Design Nanoelectronics Integrated Systems Center Nile University Cairo Egypt Department of Electrical & Electronics Engineering University of Technology PETRONAS Bandar Seri Iskandar Tronoh Perak Malaysia

Energy and Environment, both are the main concern for every researcher allover the world. Alternative energy sources that are environmental friendly became the challenge to satisfy world needs. Oil and Gas are no more the main source of Energy, consequently the demand of an everlasting cheap source of energy that is environmental friendly, is the main goal recently. During the last decade, power consumption has decreased opening the field for energy harvesting to become a real time solution for providing different sources of electrical power. Energy Harvesting is a new technology that is going to make a revolution in the coming decade. Energy Harvesting is a technique to provide alternative sources of energy that are environmental friendly and low in cost. Future applications need wireless devices to operate for longer durations away from centralized power sources or the amount of power that can be supplied to these wireless devices to be increased. Currently, many technologies have been developed that attempt to overcome the limitations imposed on wireless devices. Radio Frequency Energy Harvesting is one of these types of energy harvesting that is able to convert Radio Frequency waves from ambient air to electrical energy. This paper presents a model for harvesting radio frequency energy waves. The presented model is directed towards different applications and targeting mainly Radio Frequency Identification (RFID) applications, where it works on frequencies in the range of 2.1 - 2.45 GHz. The recommended model faces size and efficiency problems presenting a very small radio frequency energy-harvesting model that can be implemented easily inside Radio Frequency Identification (RFID) applications. A final model for Radio Frequency Energy Harvesting is proposed based on different types of simulations and experiments.

关键词： Radiofrequency identification Energy harvesting Wireless sensor networks Schottky diodes Wireless communication Antennas Capacitors

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An efficient hybrid scheduling scheme for impatience user in eMBMS over LTE

An efficient hybrid scheduling scheme for impatience user in...

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International Conference on Computer Communication and Informatics (ICCCI)

作者： Rochak Sachan Navrati Saxena Abhishek Roy Department of Electrical and Computer Engineering Sungkyunkwan University Suwon South Korea System Design Laboratory Telecom Systems Division Samsung Electronics Suwon South Korea

ISBN: (纸本)9781467329064

The 3 rd Generation Partnership Project - Long Term Evolution (3GPP-LTE) is the best choice for multimedia data transmission in demanding situation. The 3GPP LTE provides high data transmission rate between the User Equipment (UE) and Evolved Node B (eNB) with lower latency and better throughput. However, with the advancement and increasing traffic of data load, it is necessary to have data scheduling with user requests. In real life situations, mobile users become impatient when they don't receive their desired data. Moreover, the LTE Enhanced Multimedia Broadcast Multicast Services (eMBMS) does not provide any type of scheduling to measure and manage the impatient user request in multimedia broadcasting scenario. So, we consider this situation in our proposed scheme and simulated a new type of hybrid scheduling scheme to overcome this problem. It also takes care of the server anomalies arising from multiple requests sent by the same user for the same data.

关键词： Optimal scheduling Multimedia communication Quality of service Data communication Computers Servers Informatics

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Combinational logic approach for designing RNS multipliers

Combinational logic approach for designing RNS multipliers

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Midwest Symposium on Circuits and systems (MWSCAS)

作者： A.A. Hiasat H. Abdel-Aty-Zohdy Electronics Engineering Department Royal Scientific Society Princess Sumaya University for Technology Amman Jordan Microelectronics System Desigh Laboratory Electrical and Systems Engineering Oakland University Rochester MI USA

The design of Residue Number system (RNS) multipliers has received considerable attention in the last few years. This paper presents a new approach for designing modular multipliers using a combinational logic technique. The idea is based on constructing a truth table whose inputs are the bits of the multiplicand and the multiplier. The outputs are the bits of the modular product. Realizing any minimized Boolean function is achieved using two levels of gates. Compared to most recent developed approach, our new technique requires less integrated circuit area and operates at a higher speed.

关键词： Minimization methods Zinc

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Dynamic impedance model of piezoelectrochemical transducer effect for a smart battery

Dynamic impedance model of piezoelectrochemical transducer e...

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Midwest Symposium on Circuits and systems (MWSCAS)

作者： P.S. Teli H.S. Abdel-Aty-Zohdy F. Line Vogel R.L. Ewing Microelectronics System Design Laboratory Department of Electrical and System Engineering Oakland University Rochester MI USA Graphi Tech Inc. Saint Clair Shores MI USA Information Directorate Air Force Research Laboratory OH USA

Intelligent power management for dry cell batteries may be accomplished by external circuitry which is connected to the individual power cells. In comparison, the presented graphite circuit model, along with lead-acid battery technology facilitates the power management of wet cells in sealed packaging. This paper reiterates the piezoelectrochemical transducer (PECT) effect based on the intercalation of graphite with sulfuric acid. It introduces a first attempt at developing a dynamic circuit model which will facilitate for a wide range of smart PECT applications. The paper also addresses the usage of PECT effect device for smart battery management, which operates in sulfuric acid environment. The developed dynamic impedance circuit model of PECT effect device can be used further to understand the changes in resistance and reactance properties of PECT device with the change in the temperature, voltage, current, stages, type of graphite and the concentration of sulfuric acid of electrochemical intercalation of graphite with sulfuric acid

关键词： Impedance Piezoelectric transducers Circuits Battery management systems Energy management Technology management Packaging Environmental management Temperature Voltage

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Development of a 6-axis robotic arm controller implemented on a low-cost microcontroller

Development of a 6-axis robotic arm controller implemented o...

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International Conference on electrical engineering/Electronics, Computer, Telecommunications and Information Technology, ECTI-CON

作者： Agus Bejo Wanchalerm Pora Hiroaki Kunieda Embedded System and IC Design Research Laboratory Department of Electrical Engineering Faculty of Engineering Chulalongkom University Thailand Kunieda-Isshiki Laboratory Department of Communication and Integrated Systems Graduate School of Science and Engineering Tokyo Institute of Technology Japan

This paper presents a case study of development of a 6-axis robotic arm controller. The robot is powered by a hydraulic pump. The position of each axis can be derived from its potentiometer voltage. At each and every axis, a servo-valve is employed to control a servo motor. Its relative velocity is related to the servo-valve input. With 2 nd order PID controller, a micro-controller commands movements of all axes. The PID inputs are the six voltages from potentiometers and its outputs are the six DC voltages, which command the six servo-valves. A trajectory file is generated by solving the inverse kinematics problem with some (angular to digital value) conversions. A special case; closed-form calculation is developed to solve kinematics problem. With some constraints it only yields one solution. Experiments show that robot follow the given trajectory with acceptable errors.

关键词： Robot control Microcontrollers Robot kinematics Control systems Potentiometers Communication system control Voltage Servomechanisms Servomotors Service robots

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Bio-Inspired Integrated Chips for Telecommunications S/W Defect-Tracking

Bio-Inspired Integrated Chips for Telecommunications S/W Def...

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IEEE International Symposium on Signal Processing and Information Technology (ISSPIT)

作者： Hoda S Abdel-Aty-Zohdy Mostafa Hashem Sherif Adam Smiarowski Brian Searing WPAFB/RITA Air Force Research Laboratory OH USA Microelectronics System Design Lab Electrical and Computer Engineering Department Oakland University Rochester MI USA Middletown NJ USA

Defect tracking is important in evaluating the reliability of the software used in telecommunication networks. Bio-inspired integrated approaches and embedded chips have been developed and implemented to track improvements in the software reliability. In this paper, the integrated model for the failure discovery during testing is combined with bio-inspired approaches using the recurrent dynamic neural network (RDNN) with parametric adjustments and wavelets as basis; and the adaptive parameters RDNN (ARDNN) where the criterion is to minimize the error in failure intensity estimation, subject to the model constraints. Simulation results favor our adaptive recurrent dynamic neural network, with reduced error from 88% to 1.25 –to- 8% based on the number of iterations in the training phase.. The ARDNN approach provides optimum solution to the dynamic problem at hand since it iterates on the shape of the wavelet basis and provide adequate recovery of the data in the form of piecewise linear differential.

关键词： Software testing Neural networks Telecommunication network reliability Recurrent neural networks Genetic algorithms Parameter estimation Biomedical signal processing Information technology microelectronics Computer networks

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Implementation aspects of turbo-decoders for future radio applications

Implementation aspects of turbo-decoders for future radio ap...

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IEEE Conference on Vehicular Technology (VTC)

作者： F. Berens A. Worm H. Michel N. Wehn Advanced System Technology Geneva Applications Laboratory ST Microelectronics N.V. Geneva Switzerland Department of Electrical Engineering Institute of Microelectronic Systems University of Kaiserslautern Kaiserslautern Germany

Turbo codes will most likely be employed in future radio systems as a channel coding scheme for high-rate data services. However, turbo decoding is a comparatively complex task. To obtain efficient decoder implementations, the system design space has to be explored on multiple levels. In this paper, we span the system design space for turbo codes and describe a method of exploration, while focusing on the implementation-dependent part. The design decisions taken during exploration are rated regarding complexity, throughput and power consumption. The second part of our paper evaluates sample software and hardware implementations of a 2 Mbit/s turbo decoder.

关键词： Iterative decoding Turbo codes Hardware Viterbi algorithm Space technology Throughput Energy consumption Convolutional codes Iterative algorithms Computer architecture

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Optimized low-power thermal stepper system for harsh and inaccessible environments

Optimized low-power thermal stepper system for harsh and ina...

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Annual Conference of Industrial Electronics Society

作者： Ruimin Yang Jeroen van Schieveen Stoyan Nihtianov Jo Spronck Faculty of Electrical Engineering Department of Microelectronics Electronic Instrumentation Laboratory Delft University of Technnology Delft Netherlands Faculty of 3mE Department of Precision and Microsystem Engineering Mechatronic System Design Delft University of Technnology Delft Netherlands

This article presents an optimized thermal stepper system which is used to align the critical parts of high-performance smart sensors, such as capacitive sensors. In order to apply the system in harsh and inaccessible industrial environments, improvements have been made, such as reduced power consumption (1mW during measurement mode), increased alignment accuracy (within 0.1um), increased interconnect reliability, and better immunity to external interferences. Experimental results are shown which demonstrate the improved performance of the thermal stepper system.

关键词： Temperature measurement Capacitive sensors Accuracy Power demand Heating

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Modeling and simulation for on-chip power grid networks by locally dominant Krylov subspace method 08

Modeling and simulation for on-chip power grid networks by l...

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IEEE International Conference on Computer-Aided design

作者： Boyuan Yan Sheldon X.-D. Tan Gengsheng Chen Lifeng Wu Department of Electrical Engineering University of California Riverside CA USA ASIC & System State-Key-Lab MicroElectronics Department Fudan University Shanghai China Cadence Design Systems Inc. San Jose CA USA

ISBN: (纸本)9781424428205

Fast analysis of power grid networks has been a challenging problem for many years. The huge size renders circuit simulation inefficient and the large number of inputs further limits the application of existing Krylov-subspace macromodeling algorithms. However, strong locality has been observed that two nodes geometrically far have very small electrical impact on each other because of the exponential attenuation. However, no systematic approaches have been proposed to exploit such locality. In this paper, we propose a novel modeling and simulation scheme, which can automatically identify the dominant inputs for a given observed node in a power grid network. This enables us to build extremely compact models by projecting the system onto the locally dominant Krylov subspace corresponding to those dominant inputs only. The resulting simulation can be very fast with the compact models if we only need to view the responses of a few nodes under many different inputs. Experimental results show that the proposed method can have at least 100X speedup over SPICE-like simulations on a number of large power grid networks up to 1 M nodes.

关键词： Network-on-a-chip Power grids Power system modeling Transfer functions Attenuation Filters system-on-a-chip Application specific integrated circuits microelectronics Circuit analysis

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