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检索条件"机构=Digital System Engineering Laboratory Department of Computer Engineering Faculty of Engineering"

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Index-based RNS DWT architectures for custom IC designs

Index-based RNS DWT architectures for custom IC designs

引用

IEEE Workshop on Signal Processing systems (SIPS)

作者： J. Ramirez P.G. Fernandez U. Meyer-Base F. Taylor A. Garcia A. Lloris Department of Electronics and Computer Technology University of Granada Spain Department of Electrical Engineering University of Jaén Spain Department of Electrical and Computer Engineering FAMU and FSU College of Engineering USA High-Speed Digital Architecture Laboratory University of Florida USA School of Computer Engineering Universidad Autónoma de Madrid Spain

The design of high-performance, high-precision, real-time digital signal processing (DSP) systems, such as those associated with wavelet signal processing, is a challenging problem. This paper reports on the innovative use of the residue number system (RNS) for implementing high-end wavelet filter banks. The disclosed system uses an enhanced index-transformation defined over Galois fields to efficiently support different wavelet filter instantiations without adding any extra cost or additional lookup tables (LUT). An exhaustive comparison against existing two's complement (2C) designs for different custom IC technologies was carried out. These structures have been demonstrated to be well suited for field programmable logic (FPL) assimilation as well as for CBIC (cell-based integrated circuit) technologies.

关键词： Discrete wavelet transforms digital signal processing Filter bank Table lookup Integrated circuit technology Signal design Real time systems Galois fields Costs Programmable logic arrays

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digital hardware organization course for SoC program

Digital hardware organization course for SoC program

引用

IEEE International Conference on Microelectronic systems Education

作者： P. Ellervee H. Tenhunen Department of Computer Engineering Tallinn Technical University Estonia Electronic System Design Laboratory Royal Institute of Technology Stockholm Sweden

ISBN: (纸本)0769511562

In this paper we describe our approach towards the second level digital techniques course suited for system-on-Chip (SoC) oriented curriculum. Due to enhanced utilization of synthesis techniques and higher level block-oriented design, new requirements for digital hardware design are set up. Our working hypothesis is that the course focus needs to be in a systematic working set based on general transformation and refinements are more important than a presentation of detailed and specific target solutions. Thus the student should master the methodology and understand the underlying principles, which will enable him or her, to utilize more effectively the advanced VHDL synthesis techniques, which are covered in the follow-up course.

关键词： Hardware Electronic mail system-on-a-chip Integrated circuit technology Logic Laboratories Design engineering Integrated circuit synthesis Microelectronics digital systems

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Design approach for biomedical smart sensors

Design approach for biomedical smart sensors

引用

Midwest Symposium on Circuits and systems (MWSCAS)

作者： R.L. Ewing H.S. Abdel-Aty-Zohdy Air Force Research Laboratory Inforamation Directorate Adjunct Professor Department of Electrical and Computer Engineering Air Force Institute of Technology USA Microelectronics System Design Laboratory Department of Electrical and Systems Engineering Oakland University Rochester MI USA

ISBN: (纸本)078037150X

system-on-Chip solid state circuits that sense, receive, transmit, and process signals are the sensors, or eyes and ears, of the medical field of the millennium. The goal and design of the system-on-Chip (SOC) program for industry will be to provide affordable, reproducible, and reliable front-end instrumentation, components and subsystems for medical systems. To process/store/analyze the signals acquired from these medical sensors, analog/digital systems are used to provide data fusion and information extraction. These biomedical smart sensors cover the hybrid domains of mixed-technology (electrical, mechanical, optical, thermal, biochemical) and mixed-concept (electrical, control, digital signal processing). These significant domain design differences impose robust design challenges for medical sensor technology.

关键词： Intelligent sensors Biosensors system-on-a-chip Signal processing Sensor systems Mechanical sensors Solid state circuits Eyes Ear Instruments

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Printed Thai character recognition using fuzzy-rough sets

Printed Thai character recognition using fuzzy-rough sets

引用

IEEE Region 10 International Conference TENCON

作者： Watjanapong Kasemsiri Chom Kimpan Information Science Laboratory Research Centre for Communication and Information Technology King Mongkut's Institute of Technology Bangkok Thailand Computer Engineering Department Faculty of Engineering King Mongkut's Institute of Technology Bangkok Thailand

This paper proposes the method of fuzzy rough sets for the recognition of Thai Characters. We divide the classification process into 2 levels, coarse and fine classification. Both levels of classification have the same processes, applying the rough set lower approximation and then using fuzzy rough sets. The difference between the two levels is in the features of the input data used for classifying. There are 40 coarse groups and some of them need not pass through the second level of classification. We trained this system with 2816 training samples, which were composed of 4 fonts and 4 sizes of characters. The system is tested with an unknown sample, which is composed of 7 fonts and 7 sizes of characters; 4 fonts and 4 sizes of the training sample are inclusive. The accuracy of this proposed system is as high as 89%.

关键词： Character recognition Rough sets Information systems system testing Laboratories Information technology Decision making Uncertainty Equations

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Separated role of on-chip and on-PCB decoupling capacitors for reduction of radiated emission on printed circuit board

Separated role of on-chip and on-PCB decoupling capacitors f...

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IEEE International Symposium on Electromagnetic Compatibility (EMC)

作者： Jonghoon Kim Baekkyu Choi Hyungsoo Kim Woonghwan Ryu Young-hwan Yun Seog-heon Ham Soo-Hyung Kim Yong-hee Lee Joungho Kim Terahertz Media and System Laboratory Division of Electrical Engineering Korea Advanced Institute of Science and Technology Daejeon South Korea Department of Electrical Engineering and Computer ScienceKorea Advanced Institutes of Science and Technology Samsung Electronics Company Limited Daejeon South Korea

The power/ground fluctuation is known as a significant source of radiated emission. We discuss the separated functions of on-PCB and on-chip decoupling capacitors on the suppression of electromagnetic radiated emission. Due to the different ranges of parasitic inductance and the different locations of the on-chip current drivers, on-PCB and on-chip decoupling capacitors exhibit separated frequency characteristics in terms of suppression efficiency of radiation. The roles of on-PCB and on-chip decoupling capacitors are estimated by circuit simulation and a simple antenna model, and are confirmed by experiments. It is found that the on-chip decoupling capacitors are mainly effective for the suppression of radiated emission over 100 MHz frequency. Increase of the on-chip decoupling capacitance and decrease of the parasitic inductance of the package produce an improved suppression ratio at high frequency range. Combined placement and sizing of the decoupling capacitors have achieved more than 10 dB suppression of the electromagnetic radiated emission over a wide spectrum range.

关键词： Capacitors Frequency Packaging Inductance Electromagnetic radiation Network-on-a-chip Parasitic capacitance digital circuits Voltage fluctuations Printed circuits

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A digital envelope detection filter for blood pressure measurement

A digital envelope detection filter for blood pressure measu...

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

作者： J.Y. Lee J.K. Kim G. Yoon Medical Application Team Samsung Advanced Institute of Technology Yongin si South Korea Digital Signal Processing Laboratory Department of Electrical and Computer Engineering Sungkyunkwan University Suwon South Korea

We developed a finger type blood pressure measurement system using a volume oscillometric algorithm. The digital envelope detection filter (EDF) method was applied to volume oscillometric signals which were acquired from an air-filled occlusive finger cuff. In the case of using the EDF, we could reduce the difference error and standard deviation by 30-40%.

关键词： Envelope detectors digital filters Blood pressure Pressure measurement Fingers Arteries Finite impulse response filter Frequency Biomedical monitoring Volume measurement

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system management framework and tools for Beowulf cluster 4

System management framework and tools for Beowulf cluster

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4th International Conference/Exhibition on High Performance Computing in the Asia-Pacific Region, HPC-Asia 2000

作者： Uthayopas, P. Paisitbenchapol, S. Angskun, T. Maneesilp, J. Computer and Network System Research Laboratory Department of Computer Engineering Faculty of Engineering Kasetsart University Bangkok10900 Thailand

ISBN: (纸本)0769505902

As the system size of Beowulf-Class cluster system scales up, system administration becomes challenging due to the increased complexity of the system. The lack of powerful tools for the administrative tasks even makes the matter worse. This paper presents a proposed framework for system management of large Beowulf cluster that divided the management task into well defined layers of service. A cluster management tool called SCMS (SMILE Cluster Management system) has been developed according to this framework. SCMS provides a rich set of services and tools for large cluster administration. The current implementation of SCMS is discussed referenced to the proposed framework. The software is now freely available on the Internet. © 2000 IEEE.

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Agglomerative vs. tree-based clustering for the definition of multilingual set of triphones 25

Agglomerative vs. tree-based clustering for the definition o...

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25th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2000

作者： Imperl, Bojan Kačič, Zdravko Horvat, Bogomir Žgank, Andrej Laboratory for Digital Signal Processing Faculty of Electrical Engineering and Computer Science University of Maribor Smetanova 17 Maribor2000 Slovenia

ISBN: (纸本)0780362934

The paper addresses the problem of multilingual acoustic modelling for the design of multilingual speech recognisers. Two different approaches for the definition of multilingual set of triphones (bottom-up and a top-down) are investigated. A new clustering algorithm for the definition of multilingual set of triphones is proposed. The agglomerative clustering algorithm (bottom-up) is based on a definition of a distance measure for triphones defined as a weighted sum of explicit estimates of the context similarity on a monophone level. The monophone similarity estimation method is based on the algorithm of Houtgast. The second type of system uses tree-based clustering (top-down) with a common decision tree. The experiments were based on the SpeechDat II databases (Slovenian, Spanish and German 1000 FDB SpeechDat II). Experiments have shown that the use of the agglomerative clustering algorithm results in a significant reduction of the number of triphones with minor degradation of word accuracy. © 2000 IEEE.

关键词： Decision trees

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system management framework and tools for Beowulf cluster

System management framework and tools for Beowulf cluster

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International Conference on High Performance Computing in the Asia-Pacific Region

作者： P. Uthayopas S. Paisitbenchapol T. Angskun J. Maneesilp Computer and Network System Research Laboratory Department of Computer Engineering Faculty of Engineering Kasetsart University Bangkok Thailand

关键词： Power system management Laboratories computer networks Power engineering and energy Large-scale systems Condition monitoring Java computer network management engineering management Power engineering computing

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Comparison of techniques for estimating the frequency selectivity of bandlimited channels

Comparison of techniques for estimating the frequency select...

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IEEE Region 10 International Conference TENCON

作者： A.Z. Sha'ameri Digital Signal Processing Laboratory Department of Microelectronics and Computer Engineering Faculty of Electrical Engineering Universiti Teknologi Malaysia Skudai Johor Malaysia

A transmission channel used in application such as telecommunications can be modeled as a bandpass filter. Measurement of the frequency selectivity of the channel is important to ensure that the information-bearing signal has minimal distortion and loss of information. A comparison is made for several methods used for estimating the frequency selectivity of the transmission. The methods presented are the correlation method, instantaneous energy and frequency estimation and the cross Wigner-Ville distribution. The theoretical foundations and assumptions are described for each method. In general, all the methods gave similar performance in terms of the frequency selectivity. Due to the shorter analysis duration, both the instantaneous energy and frequency estimation and cross Wigner-Ville distribution is ideal for estimating the frequency selectivity of time-varying channels.

关键词： Frequency estimation Correlation Autocorrelation Linear systems Finite impulse response filter Nonlinear filters Band pass filters Binary sequences Linear feedback shift registers Chebyshev approximation

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