Southeastcon '97. Engineering new New Century., Proceedings. IEEE

12-14 April 1997

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Displaying Results 1 - 25 of 106
  • Proceedings IEEE SOUTHEASTCON '97. 'Engineering the New Century'

    Publication Year: 1997
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  • EMC systems engineering

    Publication Year: 1997, Page(s): 341
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (58 KB)

    Summary form only given, as follows. EMC problems have plagued the communications/electronics industry since the late 1800's. This is significant because these early problems preceeded the invention of the triode vacuum tube. When the amplificaiton of low level signals became possible the EMC problem became much worse because circuits could now respond to lower level interfering signals. Fortunate... View full abstract»

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  • Desktop videoconferencing: technology and applications

    Publication Year: 1997, Page(s): 342
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  • ATM networking and switching: principles, architectures and switching

    Publication Year: 1997, Page(s): 346
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  • Absolute sapphire optical fiber sensor for high temperature applications

    Publication Year: 1997, Page(s): 351
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  • Motor drives and control

    Publication Year: 1997, Page(s): 354
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (39 KB)

    Summary form only given, as follows. The presentation will go over motor drive fundamentals including dc motor control and ac induction motor control. In general, the motor drive includes two control loops: (1) speed and (2) current. The speed loop normally deals with field and torque commands, and the current loop is to control the instantaneous armature current. Such a general motor drive contro... View full abstract»

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  • Index of authors

    Publication Year: 1997, Page(s):360 - 361
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  • Identification of harmonic sources in power distribution systems

    Publication Year: 1997, Page(s):301 - 303
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (236 KB)

    Due to the increased use of power electronic converters, power system harmonics are becoming one of the major problems facing the electric utility industry. These serious problems have led to the development of many techniques for their analysis and evaluation. There are many computer programs for calculating harmonic propagation in a power system when the harmonic source is known. These computer ... View full abstract»

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  • Monitoring and data acquisition for a large roof-mounted photovoltaic array

    Publication Year: 1997, Page(s):298 - 300
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB)

    This paper describes a data acquisition system (DAS) used to monitor the large photovoltaic power system mounted on the roof of the Georgia Tech Aquatic Center (USA). An example of the data collected from the DAS is given in an example monthly report of the PV system's performance. This report also describes a diagnostic application of this data View full abstract»

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  • Library based hierarchical power estimation method using in/out transition activity

    Publication Year: 1997, Page(s):295 - 297
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (268 KB)

    Hierarchical power estimation of CMOS circuits based on the input/output transition activity of the circuit is introduced. For this purpose, an input/output transition table (IOTT) is drawn for each of a set of library circuits. The transition energy for each library circuit is calculated using HSPICE and saved in the input/output transition table. Using this approach, internal node power consumpt... View full abstract»

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  • Deposition and annealing studies of indium tin oxide films

    Publication Year: 1997, Page(s):230 - 232
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    Indium tin oxide (ITO) films were deposited on to glass substrates by an RF magnetron sputtering system using a pressed ITO target (In-Sn, 90-10). The deposition rate, electrical, and optical characteristics of the films have been investigated as a function of pressure. The post-deposition annealing has been done for ITO films in an argon gas ambient atmosphere, and the effect of annealing tempera... View full abstract»

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  • Detection of ocean reflected GPS signals: theory and experiment

    Publication Year: 1997, Page(s):290 - 294
    Cited by:  Papers (26)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (660 KB)

    A number of advanced applications of the Global Positioning System (GPS) have been proposed which use the signal reflected from a smooth ocean surface. The viability of these concepts hinges upon the ability to acquire and code track the reflected signal for an extended period of time over a variety of sea states. The analytical theory of specularly and diffusely reflected radio frequency radiatio... View full abstract»

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  • New low-voltage circuits for XOR and XNOR

    Publication Year: 1997, Page(s):225 - 229
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    New methods are proposed to implement the exclusive-OR and exclusive-NOR functions at the transistor level under low supply voltage. Since the dynamic power dissipation in CMOS is proportional to Vdd2, low-voltage operation of the circuit is an important issue. The main design objectives for these new circuits are low power dissipation and full-voltage swing at a low supply v... View full abstract»

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  • Dispersion-shifted fibers for very long links

    Publication Year: 1997, Page(s):287 - 289
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB)

    Transmission of information over very long distances suffer from fiber dispersion and nonlinearities. Dispersion can be avoided by using conventional dispersion-shifted fibers, but with these fibers, nonlinearities still cause much signal degradation. In order to minimize the effects of both dispersion and nonlinearities in long-haul links, new dispersion-shifted fibers are proposed which provide ... View full abstract»

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  • Performance comparisons of interpolation algorithms for 2D images

    Publication Year: 1997, Page(s):252 - 254
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    The current study concentrates on performance comparison of the MAP based algorithm with several other well known image interpolation methods such pixel replication, linear interpolation, and spectrum extrapolation. Analyses including mean square error, histogram analysis, and the matched filtering analysis were carried out. From the experimental results, the MAP based algorithm produced zoomed im... View full abstract»

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  • Performance enhancement in acousto-optic image processing

    Publication Year: 1997, Page(s):68 - 70
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    From the transfer functions of an acousto-optic (AO) cell, it is found that some basic image processing can be accomplished by using AO cells. Instead of frequency-plane filters, the AO cells are placed directly behind the object. The one dimensional edge enhancement results using one AO cell can be improved by using two acousto-optic cells which are put in tandem and with contra-propagating sound... View full abstract»

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  • Design of hybrid converter for repetitive charge mode

    Publication Year: 1997, Page(s):222 - 224
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    Resonant converter topologies may be used for applications in pulse power systems. They are of three types: series loaded, parallel-loaded and series-parallel loaded. A circuit has been built that incorporates the third type, the concept of splitting the resonant circuit capacitance into a series component and a parallel component. The switching scheme presented for this design provides a disconti... View full abstract»

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  • Telepath: real-time remote pathology

    Publication Year: 1997, Page(s):284 - 286
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB)

    The Center for Telecommunications Education and Research at UAB has introduced a new system architecture for telepathology. The prototype TelePathSM system combines efficient bandwidth utilization and lossless transfer of “store and forward” digital imaging systems with the real-time control found in video systems. The architecture of the system is constrained by requirement... View full abstract»

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  • A hierarchical approach to recognition of finished wooden components

    Publication Year: 1997, Page(s):249 - 251
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    This paper describes a system that can automatically identify textured objects, such as stained wooden parts, using color images. The system integrates texture and color information within a two-stage classification system to assign a class label. The intended application is the identification of wooden cabinet components as they travel on a conveyor in an industrial setting. The system presented ... View full abstract»

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  • Encoding a hidden auxiliary channel onto a digital audio signal using psychoacoustic masking

    Publication Year: 1997, Page(s):331 - 333
    Cited by:  Papers (10)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    We report on the development of a method of encoding an auxiliary channel onto a digital audio signal such that it is imperceptible to human observers. The encoding is accomplished by imposing slight and controlled changes on the phase spectrum of short-time signal windows. By employing principles of psychoacoustics the auxiliary channel is masked from human perception. Furthermore, the encoding a... View full abstract»

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  • Electron-beam-addressed spatial-light-modulator-based holography

    Publication Year: 1997, Page(s):63 - 67
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    Holographic information extracted by two-dimensional active optical heterodyne scanning has been demonstrated recently. The technique is called optical scanning holography (OSH). To reconstruct the obtainable holographic information, digital techniques have been used and demonstrated. For real-time applications, spatial-light-modulator-based systems need to be investigated. In this paper, we prese... View full abstract»

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  • Attenuation and phase shift of the electromagnetic waves due to moist snow

    Publication Year: 1997, Page(s):109 - 112
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    Based on the point matching technique, the attenuation and the phase shift of the electromagnetic waves due to moist snow are computed. The analysis is restricted to the forward scattering direction from oblate spheroidal moist snow. Numerical results are obtained for two orthogonal polarizations of the incident wave. The calculations are made for various microwave frequencies, between 6 and 100 G... View full abstract»

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  • On the behavior of a VQ algorithm

    Publication Year: 1997, Page(s):220 - 221
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (168 KB)

    Vector quantization algorithms have long been used to find a finite set of exemplars which represent a data set to within an a priori error tolerance. Such a representation is essential in codebook based data compression and transmission. This study is motivated by the application where the data to be encoded consists of subclasses. The codebook must provide information compression within the seve... View full abstract»

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  • Hybrid ARQ with ratio threshold combining for frequency-hop communication systems

    Publication Year: 1997, Page(s):281 - 283
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB)

    In channels affected by strong interference, the throughput of frequency-hop spread-spectrum communication systems employing hybrid automatic repeat request protocols can be unacceptably low. We show that significant improvements in throughput can be achieved by combining symbols between the different transmissions. Several symbol combining techniques based on Viterbi's ratio threshold test are pr... View full abstract»

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  • Error floors in narrowband digital FM systems

    Publication Year: 1997, Page(s):244 - 248
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    A digital FM system in the presence of simulcast interference and/or Rayleigh fading exhibits performance floors, where increased signal strength does not reduce the error rate. The mechanism which generates FM clicks even in the region of high SNRs, in simulcast as well as in multipath, is suggested. It is shown that a simple model based on two unmodulated carriers is capable of not only qualitat... View full abstract»

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