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Southeastcon '99. Proceedings. IEEE

25-28 March 1999

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Displaying Results 1 - 25 of 75
  • Proceedings IEEE Southeastcon'99. Technology on the Brink of 2000 (Cat. No.99CH36300)

    Publication Year: 1999
    Request permission for commercial reuse | PDF file iconPDF (427 KB)
    Freely Available from IEEE
  • Authors list

    Publication Year: 1999, Page(s):340 - 341
    Request permission for commercial reuse | PDF file iconPDF (107 KB)
    Freely Available from IEEE
  • On-line adaptive assessment of the synchronizing and damping torque coefficients using Kalman filtering

    Publication Year: 1999, Page(s):145 - 148
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    This paper presents an on-line optimal approach for dynamic stability assessment of a single-machine infinite-bus system. The approach is based on estimating the synchronizing and damping torque coefficients of the synchronous machine using a two-state linear Kalman filter. The coefficients are estimated from the time responses of the changes in the rotor angle, rotor speed, and electromagnetic to... View full abstract»

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  • Approximating state sets using circumscribing polyhedron with fewer facets

    Publication Year: 1999, Page(s):14 - 20
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    A polyhedron can be described using a set of linear constraints that bound the polyhedron. This paper considers the problem of approximating a polyhedron with a circumscribing polyhedron with fewer constraints. We discuss three methods to find such a circumscribing polyhedra, and compare the resulting approximation errors using sets of randomly generated polyhedra. The work is motivated by the pro... View full abstract»

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  • Evaluation of a hybrid surge testing generator configuration using computer based simulations

    Publication Year: 1999, Page(s):193 - 196
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (244 KB)

    A set of basic design guidelines for impulse or hybrid surge generators are established. PSPICE is used to determine the interaction between the generator's passive components and the load being tested. Different standardized testing waveforms are then modeled using this computer based tool. The simulations are utilized to obtain similar results as with the mathematical formulation presented in in... View full abstract»

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  • Determining the effect of sidelobe structure on angle of arrival measurements using monopulse techniques

    Publication Year: 1999, Page(s):319 - 322
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB)

    The sidelobe structure of a transmitting antenna can cause errors of angle-of-arrival (AOA) measurements by a receiving antenna. This paper addresses the conditions necessary for these measurement errors to occur by examining sidelobe data for three antennas. In addition, a maximum limit on the possible AOA measurement errors is determined View full abstract»

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  • An evaluation of reliable multicast protocols

    Publication Year: 1999, Page(s):165 - 168
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    Demand for sophisticated groupware and multimedia-based applications have increased the need for reliable multicast protocols. These protocols have to contend with problems such as feedback implosions and error handling requirements imposed by different multicasting applications. This paper evaluates the existing reliable multicast protocols and analyzes their performance. Among the metrics are re... View full abstract»

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  • Delivery of an introduction Power Systems course

    Publication Year: 1999, Page(s):142 - 144
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (176 KB)

    An introductory course in Power Systems was conceived at the University of North Florida (UNF) because power companies have power-generating plants in Jacksonville, the location of UNF. The course, Introduction to Power Systems is offered for the third year as an elective for students in the Systems Design track. In order to satisfy the design component requirement of the Accreditation Board for E... View full abstract»

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  • An artificial neural network for classifying and predicting soil moisture and temperature using Levenberg-Marquardt algorithm

    Publication Year: 1999, Page(s):10 - 13
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    The purpose of this study was to design an artificial neural network that classifies soils and quantitatively predict the soil moisture and temperature in a given soil type based on the remotely sensed data. Two different training algorithms, viz., backpropagation (BP) and Levenberg-Marquardt (LM), were employed. The accuracy of the networks studied ranged from 96.68 to 98.8%. The networks trained... View full abstract»

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  • Simplified equations of a 4-port scattering parameter model for characterizing 4-pair cabling systems of local area networks

    Publication Year: 1999, Page(s):189 - 192
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB)

    This paper presents a set of simplified equations based on a 4-port scattering parameter (S-parameter) model for characterizing digital telecommunication cabling systems. These equations are simplified form multistage cascade S-parameter matrices. Excellent agreements between measurements and the computation results from the proposed equations with the S-parameters of components of a multistage ca... View full abstract»

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  • Extending ESPRIT algorithm by using virtual array and Moore-Penrose general inverse techniques

    Publication Year: 1999, Page(s):315 - 318
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    High-resolution signal parameter estimation is frequently studied in many signal processing applications. In this paper, we present a new high-resolution direction and frequency simultaneous estimation algorithm, which extends the ESPRIT algorithm by using the Moore-Penrose general inverse and virtual array techniques. By using this new algorithm, the parameter pair (θi,fi View full abstract»

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  • A programmable logic device based resolver simulator [for motor control]

    Publication Year: 1999, Page(s):159 - 164
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    In high-speed, high-performance motor control systems, a common motor shaft angular position sensor is a resolver. A circuit is described that simulates the behavior of a resolver attached to a rotating electrical machine turning at constant speed. The circuit simulates the resolver in the sense that it has the same outputs and utilizes the same inputs. The machine speed being simulated is program... View full abstract»

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  • A Unix-based speech data collection platform

    Publication Year: 1999, Page(s):29 - 31
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    It is highly desirable to collect speech data from the telephone network via a digital interface. This avoids an additional A/D conversion normally required by analog telephone data collection hardware. A popular solution to this problem is the use of a T1 line which offers 24 digital phone lines. The leading T1 interface for Sun workstations is a system developed by Linkon Corporation. Using the ... View full abstract»

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  • Comparison of algorithms for detection of the number of signal sources

    Publication Year: 1999, Page(s):70 - 73
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (180 KB)

    Some procedures for detection of the number of signal sources in presence of noise are compared. Two kinds of noise are considered. First, signals in the presence of Gaussian white noise under an additive model are examined. In this case, the problem is just to find the multiplicity of the smallest eigenvalue of the covariance matrix of the observation vector. Second, signals in presence of noise ... View full abstract»

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  • Past and present methods for computing the dielectric constant of lattices of spheres

    Publication Year: 1999, Page(s):249 - 252
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    The computation of the effective electromagnetic material parameters for a composite material is a complex and well-visited problem. For collections of spheres in a static field, the celebrated Clausius-Mossotti equation provides extremely good dielectric constant values when mutual interaction between particles is negligible. When mutual coupling is not negligible and identical spheres are arraye... View full abstract»

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  • An implementation of a real-time experimental/analysis system for the energy conversion laboratory

    Publication Year: 1999, Page(s):138 - 141
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    This paper presents a system for visually analyzing the electromagnetic fields of electrical machines used in the energy conversion laboratory. The system utilizes the finite element method as well as various modules to achieve a real-time effect in the analysis of electrical machines while hands-on experimentation is in progress. The proposed system is aimed at developing a tool that would help i... View full abstract»

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  • Microcellular handoff control using robust prediction techniques

    Publication Year: 1999, Page(s):337 - 339
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    A new handoff schedule based on user mobility patterns and signal strength prediction for microcellular wireless networks is proposed. The signal strength prediction is based on the least mean square (LMS) adaptation algorithm and user mobility pattern is determined by a heuristic next-cell prediction technique. The handoffs previously performed can be used to predict the next visited cell of the ... View full abstract»

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  • Linear controller for robust tracking of uncertain time-delay systems

    Publication Year: 1999, Page(s):1 - 9
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB)

    We consider a class of linear time-delay dynamic systems containing uncertain elements. The plant and input matrices of the system are uncertain and the plant states have retarded arguments. The only information available about the uncertain parameters is the bounding sets in which they lie. A linear controller is developed to force the output of the uncertain time-delay system to track the output... View full abstract»

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  • Electromagnetic analysis of axi-symmetric structures

    Publication Year: 1999, Page(s):185 - 188
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    Various types of antennas and transmission media for electromagnetic waves (coax cable, waveguides, etc.) exhibit symmetry around an axis of rotation and hence called bodies of revolution. By analytically extracting the known periodic behavior of the fields in the azimuth, the fields everywhere may be found by solving Maxwell's equations in a single two dimension plane. This body of revolution (BO... View full abstract»

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  • Video communication system using portrait animation

    Publication Year: 1999, Page(s):309 - 314
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    Novel video and speech communication schemes are investigated for implementing a chat-style communications system that can be applied to mobile communications environments characterized by limited terminal performance and transmission throughputs. A method is developed of automatically generating simplified portraits that capture the essence of a person's unique facial features from photos taken w... View full abstract»

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  • An eigenvalue residuum-based criterion for detection of the number of sinusoids in white Gaussian noise

    Publication Year: 1999, Page(s):154 - 158
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    In this paper, based on the fact that the small eigenvalues of a covariance matrix, which derives from data of multiple sinusoidal signals in white Gaussian noise, are asymptotic Gaussian random processes with zero mean. An eigenvalue residuum-based criterion for the detection of the number of sinusoids in white Gaussian noise is introduced. We first consider the eigenvalues of a covariance matrix... View full abstract»

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  • Portable speech recognition system for the hearing and speech impaired

    Publication Year: 1999, Page(s):25 - 28
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    This paper discusses the design and development of a portable, calculator size speech recognition system. The system is targeted primarily to enable the speech and hearing impaired to communicate via voice. However, many other related applications are possible for this device, particularly its potential for use in communications over phone lines View full abstract»

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  • Improved quadtree decomposition/recomposition algorithm for fractal image compression

    Publication Year: 1999, Page(s):258 - 263
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (532 KB)

    We present a fractal image compression algorithm that combine aspects of the classical quadtree decomposition (QD) scheme and the quadtree recomposition scheme (QR) proposed by the authors in earlier papers. For all types of images, the new approach exhibits a superior runtime performance when compared to both the QD and QR schemes, while maintaining high fidelity for compressed images. Quantitati... View full abstract»

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  • Blur identification and correction for a given imaging system

    Publication Year: 1999, Page(s):268 - 273
    Cited by:  Papers (4)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    Estimating the blur function is the first step in all the image restoration techniques. A priori knowledge of the blur phenomenon helps improve the quality and certainty of image restoration. In this paper, a method of estimating the blur function for imaging setups that are not subject to change, for example surveillance cameras, is developed using the Wiener filter. A random noise image is used ... View full abstract»

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  • Dynamic system control using slack descriptor models

    Publication Year: 1999, Page(s):67 - 69
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (200 KB)

    Various techniques have been developed for controlling dynamic systems subject to model or input uncertainties. The slack descriptor systems model proposed by Holloway (1993) addresses such uncertainties as well as systems that have observation cost (uncertainty due to lack of samples). Here we consider some preliminary approaches to the control of systems modeled by slack descriptors, and show si... View full abstract»

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