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Conference Proceedings. IEEE Canadian Conference on Electrical and Computer Engineering (Cat. No.98TH8341)

25-28 May 1998

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Displaying Results 1 - 25 of 120
  • University And Industry - Partners In Success [front matter]

    Publication Year: 1998, Page(s):i - ix
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    Freely Available from IEEE
  • The exploitation of asymmetry in electric power transmission networks

    Publication Year: 1998, Page(s):485 - 488 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (493 KB)

    For more than a century electric networks have evolved on the basis of a three phase symmetrical equilibrium system. If the current and voltage distortion is seen as inevitable in the daily exploitation, the philosophy basically remains the same: the three phases are considered as a single symmetric ensemble. In high, very high and ultra high voltage (HV, VHV, and UHV) the appearance of a continge... View full abstract»

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  • Index [of authors]

    Publication Year: 1998, Page(s):1 - 5
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    Freely Available from IEEE
  • Low power implementation of fast addition algorithms

    Publication Year: 1998, Page(s):645 - 647 vol.2
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    As portable multimedia and communications applications emerge, the need for low power digital circuits becomes more prominent. The addition process is the most used operation in any DSP because addition is involved in all other mathematical operations. Therefore, adder design is considered critical because it influences the performance of the system in terms of power and delay. In this paper, we r... View full abstract»

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  • Application of neural networks in microwave circuit modelling

    Publication Year: 1998, Page(s):928 - 931 vol.2
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    Multi-layer perceptron neural networks have been developed for resonant microwave structures with highly non-linear responses. The network training data is compiled by an accurate electromagnetic simulation of the circuits. Two numerical examples are given: a microstrip patch antenna and a planar 3-pole filter. Utilizing the trained networks the circuits have been also optimized to certain specifi... View full abstract»

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  • MLSE in the presence of co-channel interference for radio portable channels

    Publication Year: 1998, Page(s):617 - 620 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    In the literature, the performance of a receiver using a combined MLSE equalizer and D-diversity reception was analyzed for slow multipath Rayleigh fading channels. In this paper we extend the performance analysis to a system operating in the presence of co-channel interference. A new approach based on the characteristic function method is proposed to evaluate the pairwise error probability. An av... View full abstract»

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  • Improving fractal image compression schemes through quantization and entropy coding

    Publication Year: 1998, Page(s):661 - 664 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    We explore the transform coefficients of various fractal-based schemes for statistical dependence and exploit correlations to improve the compression capabilities of these schemes. In most of the standard fractal-based schemes, the transform coefficients exhibit a degree of linear dependence that can be exploited by using an appropriate vector quantizer such as the LBG algorithm. Additional compre... View full abstract»

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  • Design of a robust speed controller for a compressor driven by a field oriented controlled induction motor

    Publication Year: 1998, Page(s):481 - 484 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    For achieving matched flow conditions in a natural gas processing plant, the design of a robust speed controller for a compressor driven by a field oriented controlled induction motor is presented. It is shown that the torque disturbance rejection can best be handled by the incorporation of a massive flywheel. The objective of the speed controller is therefore to provide robust command tracking in... View full abstract»

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  • Multifractal characterization of the electromyogram signals in presence of fatigue

    Publication Year: 1998, Page(s):866 - 869 vol.2
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    This paper presents an investigation of the chaotic behaviour of the EMG signals originating from the trapezius and middle deltoid muscles during an isotonic and isometric contraction, using the variance, correlation, and Renyi fractal dimensions of these signals as promising alternatives to the currently used features for detecting fatigue. Experiments were performed on eight healthy subjects, us... View full abstract»

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  • A performance model for high-speed computer networks

    Publication Year: 1998, Page(s):521 - 524 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    As networks and network-based applications increase in size, response time constraints and the needs for high data rates with minimum transmission delay require very high-speed communication links. This paper proposes a model which takes into account both transmission and propagation delays for evaluating the performance of high-speed computer networks. Numerical results show that the proposed mod... View full abstract»

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  • A study of turbo codes for multilevel modulations in Gaussian and mobile channels

    Publication Year: 1998, Page(s):641 - 644 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    In this paper, we present simulation results for a system combining turbo codes and multilevel modulation. This scheme is shown to be an excellent solution when it comes to transmission over bandlimited channels. Its performance in mobile radio channels can be improved using OFDM View full abstract»

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  • Full-EM synthesis of nonuniform microwave transmission lines by time-domain reflectometry

    Publication Year: 1998, Page(s):924 - 927 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    Presented is the full-EM synthesis of nonuniform transmission lines utilising time-domain reflectometry. It is shown that optimising a time-domain response using a series of small time intervals is superior to an optimisation of the frequency-domain response. The time-domain response is computed from the EM-simulated frequency-response using adaptive sampling and rational function interpolation fo... View full abstract»

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  • Architecture of a low cost spread spectrum wireless transceiver

    Publication Year: 1998, Page(s):613 - 616 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    The paper presents the RF and IF architecture of a wireless transceiver. To simplify the modulation and demodulation processes a DPSK modulation scheme has been chosen. The demodulation is done from the IF frequency of 280 MHz. The paper presents the signal propagation analysis as well as the hardware implementations of several key components. Among these, we note the unbalanced to balanced circui... View full abstract»

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  • Generating Gauss quadratures for Green's function 1/r: a randomized algorithm

    Publication Year: 1998, Page(s):657 - 660 vol.2
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    We report a randomized scheme for generating Gauss quadratures for an exponential integral representation of the Green's function 1 /r. These Gauss quadratures form the basis of the exponential-expansion-based method, which has previously been developed for rapid and accurate evaluation of the potential field and its gradient in three dimensions. Given a desired degree of acc... View full abstract»

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  • On using the solid state breaker in distribution systems

    Publication Year: 1998, Page(s):693 - 696 vol.2
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    The paper demonstrates, through the use of electromagnetic transient simulations, the key issues in the application of solid state devices for fault control and protection in the distribution systems. Three types of topologies have been considered, viz. a bus tie breaker, a transfer switch, a fault current limiter, but only two have been discussed in detail; the bus tie breaker is taken to be a sp... View full abstract»

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  • Recent developments in high power factor switch-mode converters

    Publication Year: 1998, Page(s):477 - 480 vol.2
    Cited by:  Papers (20)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    This paper presents a comprehensive review of various power factor correction techniques proposed for single phase AC-to-DC power converters. The topologies and voltage and current control systems of these approaches are addressed. Their advantages and disadvantages are outlined View full abstract»

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  • Springfield: a real-time parallel simulation of mobile telecommunications

    Publication Year: 1998, Page(s):501 - 504 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    This paper describes project Springfield, a real-time distributed simulation of a mobile telecommunications network. Springfield permits real-time viewing and modification of the simulation and its parameters, which is ideal for capacity planning and performance modeling. An object-oriented, distributed simulator was implemented in Java and speedups of up to three times were obtained View full abstract»

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  • Performance evaluation of dynamic bandwidth assignment for wireless ATM networks

    Publication Year: 1998, Page(s):902 - 905 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    We present a performance analysis of the slotted Aloha scheme as a channel access method for a hybrid medium access control (MAC) protocol for multimedia wireless networks. The performance of this Aloha (embedded Aloha) scheme is compared with the stand-alone Aloha scheme and some useful results and conclusions are drawn. In addition, the importance of some performance measures are identified and ... View full abstract»

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  • Agent-based multimedia communications on Internet

    Publication Year: 1998, Page(s):734 - 737 vol.2
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    Mobile agents have emerged as a new paradigm for communications and are proving to be more flexible than the average client in the client-server model. In the mobile agent architecture a script or program is sent to the remote severs to be executed, therefore taking advantage of the servers' resources and operating closer to the services. We describe an agent-based architecture suitable for the mu... View full abstract»

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  • Solution of static electromagnetic problems by an adaptive finite element method

    Publication Year: 1998, Page(s):810 - 813 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    An adaptive version of the finite element method, FEM, is presented which can discretize the solution region according to calculation errors. The method is applied for the solution of Laplace and Poisson equations arising in static electromagnetic problems. It is shown that the efficiency of the proposed adaptive method is much better than the normal application of the FEM and some other methods View full abstract»

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  • A low cost on-off modulated power filter for single phase motorized loads

    Publication Year: 1998, Page(s):862 - 865 vol.2
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    The paper presents a flexible low cost on-off modulated power filter (MPF) for power quality (PQ) enhancement and electric energy conservation of motorized single phase in-rush type, quasidynamic mechanical loads. These nonlinear type loads are typical of ventilation, air conditioning, pumping and other small scale industries such as sewing, shear and press machinery and food processing plants. Th... View full abstract»

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  • Probabilistic training procedure for neural network based power system diagnostic software

    Publication Year: 1998, Page(s):577 - 580 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    This paper outlines a procedure which uses a power system description language to train a neural network to generate conditional probabilities for device failures. The proposed method minimizes the need for the use of explicit conditional statements View full abstract»

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  • A fast and accurate analysis of high order patch filters

    Publication Year: 1998, Page(s):882 - 885 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (204 KB)

    With high Q circuits, one requires accurate analysis with less than 1% error. This paper uses a new hybrid method to analysis high order high and planar microwave filters. This method which is based on the 2D contour integral and the 3D moment method, is very fast and accurate View full abstract»

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  • Multifractals in ATM traffic multiplexing

    Publication Year: 1998, Page(s):517 - 520 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    This paper discusses some of the issues encountered in the study of the multiplexing process in ATM. It has been observed that a self-similar process (second-order moment) describes ATM traffic fairly well. This also applies to the study of multiplexing but only in the stationary case. In the field, the traffic process is clearly non-stationary, and therefore there is a need for new analysis metho... View full abstract»

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  • A neural network approach for routing in computer networks

    Publication Year: 1998, Page(s):826 - 829 vol.2
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    This paper presents a new approach based on artificial neural networks to solve the routing problem in a context of computer network design. This approach is based on a network representation enabling one to match each network configuration with a Hopfield (1984) neural network in order to find the best path between any node pair by minimizing an energy function. It is suitable to be integrated in... View full abstract»

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