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CCECE 2003 - Canadian Conference on Electrical and Computer Engineering. Toward a Caring and Humane Technology (Cat. No.03CH37436)

4-7 May 2003

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  • Effects of array mutual coupling on near-field DOA estimation

    Publication Year: 2003, Page(s):1881 - 1884 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (330 KB) | HTML iconHTML

    This paper presents a study on the direction-of-arrival (DOA) estimation of near-field sources with the presence of mutual coupling of the receiving array elements. Furthermore, we present a novel method to compensate the mutual coupling effect via the use of genetic algorithm, and it has been shown that the compensated result can produce a reasonable accuracy on the true location of radiating sou... View full abstract»

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  • Antennas for wireless indoor millimeter-waves applications

    Publication Year: 2003, Page(s):1877 - 1880 vol.3
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB) | HTML iconHTML

    The use of highly shaped-beam antennas in millimeter-wave for indoor wireless local area network (WLAN) may contribute to significantly enhance system performance. The antenna can be used for millimeter-wave equipment for cable-television (CATV), as well as terrestrial and satellite-broadcast systems. This paper describes the design and experimental results for the antenna at 62 GHz band. View full abstract»

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  • Wireless water quality monitoring system based on field point technology and Kohonen maps

    Publication Year: 2003, Page(s):1873 - 1876 vol.3
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (379 KB) | HTML iconHTML

    Designing and implementing a distributed measurement system for water quality (WQ) monitoring characterized by multiparameter measurement capabilities, wireless data communication, and advanced processing of data sensor based on auto-associative neural networks (Kohonen maps) is the aim of the work reported in the present paper. The WQ sensors considered are pH, temperature, conductivity and turbi... View full abstract»

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  • Multifractal characterization for classification of self-affine signals

    Publication Year: 2003, Page(s):1869 - 1872 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (331 KB) | HTML iconHTML

    In this paper, a novel multifractal approach to the classification of unknown self-affine signals is presented as an improvement over traditional traffic signal classifiers. The fundamental advantages of using multifractal measures include normalization and a very high compression ratio of a signature of the traffic, thereby leading to faster implementations, and the ability to add new traffic cla... View full abstract»

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  • Two way of round robin MAC protocol for clusterheads in WEAC for MANETS

    Publication Year: 2003, Page(s):1799 - 1802 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB) | HTML iconHTML

    A wireless mobile ad hoc network (MANET) is a collection of wireless mobile hosts forming nodes that are arbitrarily and randomly changing their locations and communicating without the aid of any centralized administration or standard support services. In cluster-based routing protocols, a clusterhead is elected from a set of nominees, based on an agreed upon rule, to act as a temporary base stati... View full abstract»

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  • Simulation of large neural nets by Neuron

    Publication Year: 2003, Page(s):1865 - 1868 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB) | HTML iconHTML

    Within the framework of the implementation of the cortical visual implant by the PolySTIM team, we have set up a model for the simulation of a large neural net stimulated by a matrix of electrodes. After developing a method of auto-organisation and interpretation and analysis tools, we validated our models thanks to experiments in the animal. The model shows a good consistency visa-vis the first t... View full abstract»

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  • Maintaining quality of service for adaptive mobile map clients

    Publication Year: 2003, Page(s):1795 - 1798 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (330 KB) | HTML iconHTML

    In this paper we present the implementation of an adaptive mobile map client. We used a client-proxy-server model that enables the map client to activate and deactivate a set of filters managed by the proxy. We developed three map generalization filters each of which reduces the amount of data received by the map client using a different technique. A set of experiments and their results are discus... View full abstract»

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  • A reconfigurable approach to hardware implementation of neural networks

    Publication Year: 2003, Page(s):1861 - 1864 vol.3
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (363 KB) | HTML iconHTML

    Hardware inefficiency of neural synapse multiplication has placed an upper limit on the neural network size that can be implemented on a single FPGA. In this paper, we make use of distributed arithmetic and internal lookup tables of FPGA structures to improve the efficiency of synapse multiplication. We propose a weight clustering optimization method to further reduce area requirements of the targ... View full abstract»

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  • Cryptanalysis of the GST stream cipher

    Publication Year: 2003, Page(s):1789 - 1794 vol.3
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (405 KB) | HTML iconHTML

    In this paper, cryptanalysis is performed on the GST stream cipher, a cipher which uses cascaded 2-bit s-boxes. The results indicate that the output probabilities for single outputs, digraphs, and trigraphs asymptotically approach those of a random sequence generator. The cipher output was also subjected to a number of statistical tests for random sequences, including the Chi-square test, Lempel-Z... View full abstract»

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  • Research of gyro signal de-noising with stationary wavelets transform

    Publication Year: 2003, Page(s):1989 - 1992 vol.3
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (302 KB) | HTML iconHTML

    In the strapdown inertial navigation system, the accurate and quick determination of the carrier initial azimuth angle and attitude angle is an important problem. The main factor that affects its accuracy is the gyroscope drift. Therefore, how to eliminate the gyroscope drift effectively becomes very important to guarantee the north-finding accuracy. As wavelets have preferable time-frequency reso... View full abstract»

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  • Training recurrent pulsed networks by genetic and Taboo methods

    Publication Year: 2003, Page(s):1857 - 1860 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (349 KB) | HTML iconHTML

    In this paper, we simulate small recurrent pulsed neural networks (up to a dozen of neurons) of leaky integrate-and-fire (LI&F) neurons and we train them thanks to general optimisation methods: genetic algorithm and taboo search; in a way inspired by the training of artificial neural networks (ANN). Unlike the taboo search, the genetic method succeeds in our training procedure. Yet, it proves out ... View full abstract»

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  • Simulation of three-rate neural network control for stochastic model of a fighter aircraft

    Publication Year: 2003, Page(s):1711 - 1714 vol.3
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (287 KB) | HTML iconHTML

    The nature of the multirate dynamics of the process makes it very attractive for applications, since the multirate phenomena are complex. This paper presents a research methodology for describing a three-rate continuous-time stochastic control system as state-space (SS) type decentralized models of multiinput/multioutput (MIMO) stochastic control subsystems with the three neural networks (NNs) of ... View full abstract»

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  • Performance analysis of two dynamic link selection algorithms in ad hoc CDMA networks

    Publication Year: 2003, Page(s):1783 - 1788 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB) | HTML iconHTML

    In a mobile ad hoc network, the connection between an arbitrary source and destination node can be established using intermediate nodes. Most of the mobile nodes heavily rely on the battery power to keep themselves alive. Therefore, the battery power (or battery lifetime) and the number of relaying nodes (or delay) play a major role in mobile ad hoc networking. In this paper we discuss three exist... View full abstract»

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  • The de-noising of gyro signals by bi-orthogonal wavelet transform

    Publication Year: 2003, Page(s):1985 - 1988 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (277 KB) | HTML iconHTML

    It is important for the strapdown inertial navigation system to determine the carrier initial azimuth angle and attitude angle accurately and quickly. The main factor that affects its accuracy is gyroscope drift. Therefore, how to eliminate the gyroscope drift effectively is the key to guarantee the north-searching accuracy. In general, the random drift is weak nonlinear and slow time invariant. A... View full abstract»

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  • Computing models based on GRNNS

    Publication Year: 2003, Page(s):1853 - 1856 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (411 KB) | HTML iconHTML

    In this paper, a method of dynamically adjusting kernel width of general regression neural networks (GRNNs) is presented. This method chooses kernel width automatically and flexibly according to the distance between input vectors and training samples. Another method, increment addition based on GRNNs, is also presented. When a large kernel width is chosen, the computed output can smoothly balance ... View full abstract»

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  • An optimal receiver for transmission diversity over uncertain channels

    Publication Year: 2003, Page(s):1707 - 1710 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB) | HTML iconHTML

    In this paper, a receiver for a dual transmit diversity system is designed that takes into account the channel estimation error, assuming the unknown channel to have a given complex bivariate Gaussian probability density function (pdf) (i.e., a Ricean pdf). This criterion of the receiver, which is based on the maximum a posteriori (MAP), is expressed in a quadratic form, and in extreme cases, repr... View full abstract»

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  • A low-overhead checkpointing protocol for mobile networks

    Publication Year: 2003, Page(s):1779 - 1782 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (329 KB) | HTML iconHTML

    The mobile wireless networks present challenges in designing fault-tolerant systems because of the mobile host (MH) mobility, limited bandwidth on wireless links, limited MH local storage, limited battery power, and the handoff. Checkpointing and rollback techniques can be used to provide fault-tolerance in a distributed application consisting of a set of cooperating processes in which some of the... View full abstract»

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  • New parameters for respiratory sound classification

    Publication Year: 2003, Page(s):1457 - 1460 vol.3
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (285 KB) | HTML iconHTML

    In this paper, a new approach based on cepstral analysis is proposed to classify respiratory sounds. The sound signal is divided into segments, which are characterized by a reduced number of cepstral coefficients. Those segments are then classified as whether containing wheezes or normal respiratory sounds, by using the vector quantization (VQ) method. This approach is tested and compared to other... View full abstract»

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  • A fast three-step search algorithm by the utilization of multilevel vector partial sums

    Publication Year: 2003, Page(s):1981 - 1984 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (330 KB) | HTML iconHTML

    Due to the high computational requirement of the full-search algorithm for block motion estimation, fast block motion estimation algorithms are needed for real-time implementations of the video coding standards. Recently, a three-step search algorithm for block motion estimation has been proposed in the literature. In this paper, a fast three-step search algorithm is proposed to further reduce the... View full abstract»

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  • Evaluating four white-box test coverage methodologies

    Publication Year: 2003, Page(s):1739 - 1742 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB) | HTML iconHTML

    This paper presents an illustrative study aimed at evaluating the effectiveness of four white-box test coverage techniques for software programs. In the study, an experimental design was considered which was used to evaluate the chosen testing techniques. The evaluation criteria were determined both in terms of the ability to detect faults and the number of test cases required. Faults were seeded ... View full abstract»

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  • An efficient matrix filling algorithm for the MoM using the plane wave expansion of the Green's function

    Publication Year: 2003, Page(s):1437 - 1440 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (278 KB) | HTML iconHTML

    An analytical method is proposed for efficient computation of the matrix elements in the method of moment (MoM) solution of surface integral equations. The method is based on expressing the free space Green's function as a summation of plane waves. The exponential form of the plane wave expansion, makes it possible to analytically evaluate the surface integrals involved in computing the matrix ele... View full abstract»

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  • Fast symbol timing recovery techniques for flexible PAM and QAM modems

    Publication Year: 2003, Page(s):1959 - 1962 vol.3
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (287 KB) | HTML iconHTML

    A fast symbol timing recovery (STR) scheme suitable for flexible-symbol-rate, burst-mode M-ary PAM and QAM demodulators used in point-to-multipoint broadband access systems is proposed. The maximum-likelihood (ML) estimation principle is used to derive a feed-forward STR strategy to achieve fast and accurate derivation of the optimum timing instant with a very short training preamble for applicati... View full abstract»

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  • Nonstationary noise cancellation in infrared wireless receivers

    Publication Year: 2003, Page(s):1945 - 1949 vol.3
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB) | HTML iconHTML

    Infrared is attracting much attention for indoor wireless access due to its enormous bandwidth, inherent privacy and low cost. Intensity modulated, directly detected infrared schemes do not experience multipath fading. However, ambient noise due to artificial lighting has been the major concern in infrared wireless systems in indoors. Conventionally, static or low frequency noise due to convention... View full abstract»

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  • Analysis of manuscript characters by the moments of wavelet packets

    Publication Year: 2003, Page(s):1933 - 1936 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (331 KB) | HTML iconHTML

    The extraction of characteristics is one of the principal components of all form recognition systems. This work relates to the use of wavelet moments as characteristics for the recognition of manuscript characters. We propose here new families and new methods of treatment of this type of characteristic. Encouraging experimental results were obtained: the most discriminating 39 characteristics amon... View full abstract»

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  • Methodology of modeling and verification of critical systems for safe operation

    Publication Year: 2003, Page(s):1819 - 1822 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (329 KB) | HTML iconHTML

    This article presents a method of modeling and verification of the safe operating properties of industrial systems. It represents first of all a data model whose exploitation could be done according to different needs: analysis, evaluation or verification. For system analysis, we propose an object oriented approach for modeling the system and the integration of the necessary data takes into accoun... View full abstract»

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