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BLOCK-BASED DECISION-FEEDBACK EQUALIZERS WITH REDUCED REDUNDANCY

BLOCK-BASED DECISION-FEEDBACK EQUALIZERS WITH REDUCED REDUND...

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European Signal Processing Conference

作者： Wallace A. Martins Paulo S. R. Diniz Federal Center for Technological Education Dept. of Control and Automation Industrial Eng. Federal University of Rio de Janeiro Depart. of Electronics and Computer Eng. Electrical Engineering Program

ISBN: (纸本)9781467310680

In recent years many works related to the design of block-based transceivers have been published. The main target of this research activity is to optimize the use of the spectral resources in broadband transmissions. A possible way to address this problem is to reduce the amount of redundancy required by block transmissions to avoid interblock interference. An efficient solution is to employ zero-padding zero-jamming (ZP-ZJ) transceivers, which allow the transmission with reduced redundancy. ZP-ZJ systems have been successfully employed in the context of linear transceivers. This paper shows how the ZP-ZJ concept can be applied in decisionfeedback equalization. Some performance analyses based on the resulting mean-square error and error probability of symbols are included to show the possible degrading effects of the reduction in the amount of redundancy. Nevertheless, simulation results illustrate that data throughput and average mutual information between transmitted and estimated symbols can be enhanced significantly without affecting the system performance, for a certain level of signal-tonoise ratio at the receiver.

关键词： Block DFE Reduced redundancy Throughput redundancy Transceivers Research Activities System performance Signs and symbols feedback equalizer data throughput Error probability Transmissions broadband

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A Deployable Quadrifilar Helix Antenna for CubeSat

A Deployable Quadrifilar Helix Antenna for CubeSat

引用

IEEE International Symposium on Antennas and Propagation

作者： J. Costantine D. Tran M. Shiva Y. Tawk C. G. Christodoulou S. E. Barbin Electrical Engineering Dept. California State University Fullerton Fullerton CA92834 USA Electrical and Computer Eng. Dept. University of New Mexico Albuquerque NM 87131 USA Telecom. and Control Eng. Dept. Polytechnic University of Sao Paulo Sao Paulo SP 05508-900 Brazil

ISBN: (纸本)9781467304610

In this paper we present a new quadrifilar helix antenna designed for CubeSat applications. The quadrifilar helix antenna presented in this paper covers the UHF bandwidth between 250 MHz and 500 MHz. The antenna is fed with four ports and exhibits circular polarization as well as an acceptable gain over the desired frequency range.

关键词： Helical antennas frequency ranges CIRCULAR POLARIZATION Ultrahigh frequencies paper harbors ANTENNA antennae Bandwidth Exhibitions

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Fault-tolerant Audio and Video Bridging (AVB) Ethernet: A novel method for redundant stream registration configuration

Fault-tolerant Audio and Video Bridging (AVB) Ethernet: A no...

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Institute of Electrical and Electronics Engineers International Conference on Emerging Technologies & Factory Automation

作者： Oliver Kleineberg Peter Frohlich Donal Heffernan Hirschmann Automation & Control GmbH Electronic and Computer Engineering Dept. University of Limerick

ISBN: (纸本)9781467347358

The Audio and Video Bridging (AVB) technology equips Ethernet with Real-Time characteristics, based on standards developed by IEEE 802.1. In 2011, the IEEE 802,1 AVB Task group completed the first generation of AVB Standards, and is currently starting standardization work on AVB Generation 2, aimed at Industrial Automation & control networks, as well as Automotive networks. One aspect of this standardization effort is to adapt AVB stream reservation mechanisms to operate with industrial-standard fault tolerance technologies. This paper proposes a method to allow AVB to be used flexibly with different use-cases and different stream configuration mechanisms to achieve fault-tolerance. The method has been verified through simulation and has been proposed to the AVB task group for inclusion into the 2nd Generation AVB standards.

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Towards the Time Varying Estimation of Complex Brain Connectivity Networks by means of a General Linear Kalman Filter Approach

Towards the Time Varying Estimation of Complex Brain Connect...

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Annual International Conference of the IEEE engineering in Medicine and Biology Society

作者： J. Toppi F. Babiloni G. Vecchiato F. De Vico Fallani D. Mattia S. Salinari T. Milde L. Leistritz H. Witte L. Astolfi Department of Computer control and management engineering of the Univ. of Rome "Sapienza" and with fRCCS "Fondazione Santa Lucia" Rome Italy Dept. of Physiology and Pharmacology of the University of Rome "Sapienza" and with fRCCS "Fondazione Santa Lucia" Rome Italy Fondazione Santa Lucia Rome Italy Department of Computer control and management engineering Univ. of Rome "Sapienza Rome Italy Bernstein Group Computational Neuroscience

ISBN: (纸本)9781457717871

One of the main limitations of the brain functional connectivity estimation methods based on Autoregressive Modeling, like the Granger Causality family of estimators, is the hypothesis that only stationary signals can be included in the estimation process. This hypothesis precludes the analysis of transients which often contain important information about the neural processes of interest. On the other hand, previous techniques developed for overcoming this limitation are affected by problems linked to the dimension of the multivariate autoregressive model (MV AR), which prevents from analysing complex networks like those at the basis of most cognitive functions in the brain. The General Linear Kalman Filter(GLKF) approach to the estimation of adaptive MV ARs was recently introduced to deal with a high number of time series(up to 60) in a full multivariate analysis. In this work we evaluated the performances of this new method in terms of estimation quality and adaptation speed, by means of a simulation study in which specific factors of interest were systematically varied in the signal generation to investigate their effect on the method performances. The method was then applied to high density EEG data related to an imaginative task. The results confirmed the possibility to use this approach to study complex connectivity networks in a full multivariate and adaptive fashion, thus opening the way to an effective estimation of complex brain connectivity networks.

关键词： Time Varying Estimation Complex Brain Connectivity Networks General Linear Kalman Filter Approach

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Unconstrained Measurement System for Scratching by Limb and Estimation of Scratching Area

Unconstrained Measurement System for Scratching by Limb and ...

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International Conference on Intelligent Computational Systems(ICICS’2012);International Conference on Mechanical,Automotive and Materials engineering(ICMAME’2012);International Conference on Electronics,Biomedical engineering and its Applications(ICEBEA’2012);International Conference on Ecological,Environmental and Biological Sciences(ICEEBS’2012);International Conference on Business,Economics,Management and Behavioral Sciences (ICBEMBS’2012);International Conference on Applied Mathematics and Pharmaceutical Sciences(ICAMPS’2012)

作者： Toshihiro.Shino Yosuke.Kurihara Syoko.Nukaya Kajiro.Watanabe Hiroshi.Tanaka the Graduate School of Hosei University the Dept. of Computer and Information Science Faculty of Science and Technology Seikei University the Division of Advanced Therapeutical Sciences Tokyo Medical and Dental University the System Control Engineering Department Faculty of Engineering Hosei University the University Center for Information Medicine Tokyo Medical and Dental University

This paper describes an unconstrained measurement system for scratching motion. We have proposed an unconstrained bed monitoring system by piezoceramic sensors that could detect heartbeat respiration and body movement. The system could measure the bed vibrations due to the motion of the person on the bed. In this paper, we apply this unconstrained bed sensing method to the system for detecting scratching motion. The proposed sensors are placed under the bed feet. When the subject is lying on the bed, the output signals from the sensors are proportional to the magnitude of the vibration due to the body movement of the subject. Hence, it is possible to detect the subject's scratching motion from the output signals. Furthermore, also with output signals from the three ceramic sensors, the proposed system can detect the direction of the body movement, which enables us to estimate the scratched area. We evaluated three scratching motions using the proposed system in the validity experiment as follows: Case 1 is the subject's scratching the right cheek with right hand;Case 2 is the subject's scratching the back after turning over, and;Case 3 is the subject's scratching the shin with another foot. As the results of the experiment, we identified the scratching signals that enable the determination when the scratching occurred. Furthermore, the difference among the amplitudes of the output signals enabled us to estimate where the subject scratched.

关键词： body movement, itchy, piezoceramics, scratching unconstrained bed monitoring.

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Cortical Activity and Functional Hyperconnectivity by Simultaneous EEG Recordings from Interacting Couples of Professional Pilots

Cortical Activity and Functional Hyperconnectivity by Simult...

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Annual International Conference of the IEEE engineering in Medicine and Biology Society

作者： L. Astolfi J. Toppi G. Borghini G. Vecchiato E J. He A. Roy F. Cincotti S. Salinari D. Mattia B. He F. Babiloni the Department of Computer control and management engineering Univ. of Rome "Sapienza" and with the Fondazione Santa Lucia Hospital Rome Italy Fondazione Santa Lucia Rome Italy. the Dept. of Physiology and Pharmacology of the University of Rome "Sapienza" and with Fondazione Santa Lucia Rome Italy. School of Engineering and Applied Sciences University of Pennsylvania USA. the Department of Biomedical Engineering University of Minnesota Minneapolis Minnesota USA. the Department of Computer control and management engineering Univ. of Rome "Sapienza Rome Italy the Department of Biomedical Engineering University of Minnesota Minneapolis Minnesota USA

ISBN: (纸本)9781424441198

controlling an aircraft during a flight is a compelling condition, which requires a strict and well coded interaction between the crew. The interaction level between the Captain and the First Officer changes during the flight, ranging from a maximum (during takeoff and landing, as well as in case of a failure of the instrumentation or other emergency situations) to a minimum during quiet mid-flight. In this study, our aim is to investigate the neural correlates of different kinds and levels of interaction between couples of professional crew members by means of the innovative technique called brain hyperscanning, i.e. the simultaneous recording of the hemodynamic or neuroelectrical activity of different human subjects involved in interaction tasks. This approach allows the observation and modeling of the neural signature specifically dependent on the interaction between subjects, and, even more interestingly, of the functional links existing between the brain activities of the subjects interacting together. In this EEG hyperscanning study, different phases of a flight were reproduced in a professional flight simulator, which allowed, on one side, to reproduce the ecological setting of a real flight, and, on the other, to keep under control the different levels of interaction induced in the crew by means of systematic and simulated failures of the aircraft instrumentation. Results of the procedure of linear inverse estimation, together with functional hyperconnectivity estimated by means of Partial Directed Coherence, showed a dense network of connections between the activity in the two brains in the takeoff and landing phases, when the cooperation between the crew is maximal, while conversely no significant links were shown during the phases in which the activity of the two pilots was independent.

关键词： Cortical Activity and Functional this EEG hyperscanning study Directed Coherence

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Wide Area control Framework Design Considering Different Feedback Time Delays

Wide Area Control Framework Design Considering Different Fee...

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IEEE Power and Energy Society General Meeting

作者： Gang Chen Yuanzhang Sun Vaithianathan "Mani" Venkatasubramanian Lin Cheng Jin Lin Anjan Bose Weixing Zhao Cheng Lin State Key Lab. of Power Systems Dept. of Electrical Engineering Tsinghua University Beijing 100084 China School of Electrical Engineering and Computer Science Washington State University Pullman WA 99164-2752 USA Guizhou Electric Power Grid Dispatching and Control Center Guiyang Guizhou 550002 China

ISBN: (纸本)9781467327275

In this paper, a framework for a real-time wide area controller is established for damping small-signal instability related events in interconnected power systems. Offline designing is performed to design the centralized controller for each inter-area mode of the power system. Residue approach is used to select the most effective stabilizing signals and controller locations. Different constant time delays are taken into controller parameters design. Thus an offline controller database is formed, including different controllers of each mode. The parameters of each controller are different for various ranges of time delay. The damping and other mode information will be identified by online multi-Prony analysis. When an inter-area mode is detected with weak or negative damping, say less than 3%, the corresponding controller for the detected mode will be initiated and deployed for enhancing the damping of the problematic mode. The time delay, which is used to select a suitable set of parameters for a chosen controller, could be calculated online, using the time stamps of the actuator and feedback signal. The paper proposes the framework of the controller with preliminary discussions on the various components of the controller, including: 1) the offline controller database, 2) the online detection of undamped oscillations, and 3) the online corrective control actions at the actuator. The 4-machine 2-area case study results demonstrated the advantage of the proposed method.

关键词： Small signal stability phasor measurement units (PMUs) power system stabilizer (PSS) wide area control damping controller time delay controllers timestamp time delay undamped oscillations central controller OFF LINE Frameworks actuators

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Evaluations of Different Simultaneous Localization and Mapping (SLAM) Algorithms

Evaluations of Different Simultaneous Localization and Mappi...

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Annual Conference on IEEE Industrial Electronics Society

作者： Gurkan Tuna Kayhan Gulez V. Cagri Gungor T. Veli Mumcu Trakya University Department of Computer Programming Yildiz Technical University Electrical-Electronics Faculty Control and Automation Eng. Dept. Bahcesehir University Faculty of Engineering Department of Computer Engineering

ISBN: (纸本)9781467324199

Simultaneous Localization and Mapping (SLAM) algorithms with multiple autonomous robots have received considerable attention in recent years. In general, SLAM algorithms use odometry information and measurements from exteroceptive sensors of robots. The accuracy of these measurements and the performance of the corresponding SLAM algorithm directly affect the overall success of the system. This paper presents comparative performance evaluations of three Simultaneous Localization and Mapping (SLAM) algorithms using Extended Kalman Filter (EKF), Compressed Extended Kalman Filter (CEKF) and Unscented Kalman Filter (UKF). Specifically, it focuses on their SLAM performances and processing time requirements. To show the effect of CPU power on the processing time of SLAM algorithms, two notebooks and a netbook with different specifications have been used. Comparative simulation results show that processing time requirements are consistent with the computational complexities of SLAM algorithms. The results we obtained are consistent with the CPU power tests of independent organizations and show that higher processing power decreases processing time accordingly. The results also show that CEKF is more suitable for outdoor SLAM applications where there are a lot of natural and artificial features.

关键词： Simultaneous localization and mapping Navigation Visualization Power measurement Estimation MONOS devices

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Studying robot-environment interaction via transparent controllers

Studying robot-environment interaction via transparent contr...

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IEEE 15th International Conference on Advanced Robotics: New Boundaries for Robotics, ICAR 2011

作者： Akanyeti, O. Fiorini, P. Billings, S.A. Dept. of Computer Science University of Verona Italy Dept. of Automatic Control and Systems Engineering University of Sheffield United Kingdom

ISBN: (纸本)9781457711589

In this paper we address the question of "Why is it that a mobile robot, programmed in a certain way and placed in some environment to execute a program, behaves in the way it does?". We present three real world experiments in which we first obtain transparent controllers to express sensor-motor couplings of a mobile robot. We then use these models to analyze the robot behaviour formally;in particular to understand how the sensor readings are related to motor commands, to evaluate the derived controllers from a mathematical point of view and even to predict the behaviour of the robot in untested environments. © 2011 IEEE.

关键词： Mobile robots

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Event-based Patient Motion Detection and Compensation in Image-Guided Robotics

Event-based Patient Motion Detection and Compensation in Ima...

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IEEE RAS & EMBS International Conference on Biomedical Robotics and Biomechatronics

作者： Tamas Haidegger Peter Kazanzides Balazs Benyo Zoltan Benyo Dept. of Control Engineering and Information Technology Budapest University of Technology and Economics Johns Hopkins University Center for Computer-Integrated Surgical Systems and Technology

ISBN: (纸本)9781457711992

We report a generalized approach to deal with patient motion in robotic image-guided surgery, along with in silico and dry laboratory tests on a neurosurgical robot setup. External patient motion events (excluding physiological motion) can occur during surgery despite body fixation, and can endanger the outcome of the surgery, as they invalidate the registration between the robot and the patient. The core of the compensation algorithm is to rely on the combination of the robot joint encoders, tracking data and the internal coordinate frame of the intra-operative navigation system to ensure accurate execution of the pre-operative plan. The method allows for the continuous correction of the registration through identifying the actual surgical event in the operating room. From the control point of view, the intra-operative events have been categorized as robot motion, camera motion, patient motion and the combinations of these. The registration update is based on the use of the most reliable reference frame and extending-window averaging to compensate for the occurred patient motion. Simulation results were performed on a generic image-guided robot model, and on a skull base surgery robot. Patient motion events were detected in 80% of the cases, which already leads to a gradual improvement of the procedure. The proposed structure allows for a more generic, probability-based handling of the operating room events that may lead to safer and more accurate surgical treatment in the future.

关键词： Patient Motion Artifact compensated control point Registration Robot Operating rooms Surgery REFERENCE FRAMES

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