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Journal of Systems Engineering and Electronics

Issue 3 • Sept. 2004

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Displaying Results 1 - 25 of 42
  • [Front cover]

    Publication Year: 2004, Page(s): c1
    IEEE is not the copyright holder of this material | PDF file iconPDF (555 KB)
    Freely Available from IEEE
  • Copyright page

    Publication Year: 2004, Page(s): 1
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  • Contents

    Publication Year: 2004, Page(s):1 - 2
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    Freely Available from IEEE
  • Multiuser detector based on wavelet networks

    Publication Year: 2004, Page(s):225 - 231
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1172 KB)

    Multiple access interference (MAI) and near-far problem are two major obstacles in DS-CDMA systems. Combining wavelet neural networks and two matched filters, the novel multiuser detector, which is based on multiple variable function estimation wavelet networks over single path asynchronous channel and space-time channel respectively is presented. Excellent localization characteristics of wavelet ... View full abstract»

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  • Analysis of linear weighted order statistics CFAR algorithm

    Publication Year: 2004, Page(s):232 - 236
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (822 KB)

    CFAR technique is widely used in radar targets detection fields. Traditional algorithm is cell averaging (CA), which can give a good detection performance in a relatively ideal environment. Recently, censoring technique is adopted to make the detector perform robustly. Ordered statistic (OS) and trimmed mean (TM) methods are proposed. TM methods treat the reference samples which participate in clu... View full abstract»

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  • Turbo decoding using two soft output values

    Publication Year: 2004, Page(s):237 - 240
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (756 KB)

    It is well known that turbo decoding always begins from the first component decoder and supposes that the apriori information is “0” at the first iterative decoding. To alternatively start decoding at two component decoders, we can gain two soft output values for the received observation of an input bit. It is obvious that two soft output values comprise more sufficient extrinsic inf... View full abstract»

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  • Study on the evaluation of aerospace microelectronic industry

    Publication Year: 2004, Page(s):241 - 247
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1080 KB)

    Aerospace microelectronic technology has become the core competence of aerospace technology. For evaluating the aerospace microelectronic industry, it is necessary to change descriptive language of goal to quantitative index that can be measured. Knowing quantified goals or tree structure and array of general goal system, with certain algorithm and processing each corresponding list or array, we c... View full abstract»

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  • Cipher quasi-chaotic code for frequency hopping communications

    Publication Year: 2004, Page(s):248 - 256
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1608 KB)

    The chaotic frequency hopping (FH) communication systems have been presented so far. The chaotic sequences possesses good randomness and sensitive dependence on initial conditions, which is quite advantageous to run the FH codes in code-division multiple access (CDMA) systems. But the finite precision of computation and the fact of the low-dimensional chaos predicted easily cause difficulty in cha... View full abstract»

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  • Improved fuzzy identification method based on Hough transformation and fuzzy clustering

    Publication Year: 2004, Page(s):257 - 261
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (807 KB)

    This paper presents an approach that is useful for the identification of a fuzzy model in SISO system. The initial values of cluster centers are identified by the Hough transformation, which considers the linearity and continuity of given input-output data, respectively. For the premise parts parameters identification, we use fuzzy-C-means clustering method. The consequent parameters are identifie... View full abstract»

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  • Novel clutter map CFAR algorithm with amplitude limiter

    Publication Year: 2004, Page(s):262 - 265
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (616 KB)

    The traditional clutter map constant false alarm rate (CM-CFAR) detector is affected by interference and self-masking[1] which will cause the low probability of detection. To solve these problems, a novel algorithm named clutter map CFAR with amplitude limiter (ALCM-CFAR) is proposed, in which the amplitude of the input signal is limited by a filter. The simulation results prove the eff... View full abstract»

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  • Joint channel estimation and symbol detection for space-time block code

    Publication Year: 2004, Page(s):266 - 269
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (671 KB)

    The simplified joint channel estimation and symbol detection based on the EM (expectation-maximization) algorithm for space-time block code (STBC) are proposed. By assuming channel to be invariant within only one STBC word and utilizing the orthogonal structure of STBC, the computational complexity and cost of this algorithm are both very low, so it is very suitable to implementation in real syste... View full abstract»

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  • Identification of linear continuous-time system using wavelet modulating filters

    Publication Year: 2004, Page(s):270 - 277
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1158 KB)

    An approach to identification of linear continuous-time system is studied with modulating functions. Based on wavelet analysis theory, the multi-resolution modulating functions are designed, and the corresponding filters have been analyzed. Using linear modulating filters, we can obtain an identification model that is parameterized directly in continuous-time model parameters. By applying the resu... View full abstract»

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  • Hybrid chaotic sequence for QS-CDMA system with RAKE receiver

    Publication Year: 2004, Page(s):278 - 282
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (871 KB)

    A class of the hybrid chaotic sequences is presented. The generator of the sequences is given and realized by the digital method. The hybrid chaotic sequences exhibit good random properties that are very important for the pefformance of QS-CDMA system with RAKE receiver. The performance of the system is analyzed when the hybrid chaotic sequences are used as spreading codes in a QS-CDMA system with... View full abstract»

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  • Complex fitting 3D closed-form Green's function and its application for silicon RF IC's

    Publication Year: 2004, Page(s):283 - 287
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (841 KB)

    An approximate three-dimensional closed-form Green's function with the type of exponential function is derived over a lossy multilayered substrate by means of the Fourier transforms and a novel complex fitting approach. This Green's function is used to extract the capacitance matrix for an arbitrary three-dimensional arrangement of conductors located anywhere in the silicon IC substrate. Using thi... View full abstract»

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  • Observer-based fault detection scheme for a class of discrete time-delay systems

    Publication Year: 2004, Page(s):288 - 294
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1020 KB)

    In this contribution, robust fault detection problems for discrete time-delay systems with l2-norm bounded unknown inputs are studied. The basic idea of our study is first to introduce a state-memoryless observer-based fault detection filter (FDF) as the residual generator and then to formulate such a FDF design problem as an H optimization problem in the sense of inc... View full abstract»

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  • Improvement on GM models

    Publication Year: 2004, Page(s):295 - 298
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (621 KB)

    Since grey system theory was established by prof. Deng, GM models and their improvements have all taken the first vector of the original sequence as the initialization, which resulted to deficiency in making use of the latest information. Based on the principle, which new information should be used fully, we think it is scientific to pay more attention to the new information or endow them a more w... View full abstract»

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  • Hybrid approach for fuzzy system design

    Publication Year: 2004, Page(s):299 - 303
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1043 KB)

    A hybrid approach for fuzzy system design based on clustering and a kind of neurofuzzy networks is proposed. An unsupervised clustering technique is firstly used to determine the number of if-then fuzzy rules and generate an initial fuzzy rule base from the given input-output data. Then, a class of neurofuzzy networks is constructed and its weights are tuned so that the obtained fuzzy rule base ha... View full abstract»

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  • Neural adaptive sliding mode speed tracking control of a DC motor

    Publication Year: 2004, Page(s):304 - 308
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (741 KB)

    We propose a BPNN based adaptive sliding mode control scheme for speed tracking of a DC motor with unknown system nonlinearities. The input-output linearization technique is used to cancel the nonlinearities, and output of the BPNN is incorporated into the controller in the proposed scheme. It is shown that the rotor speed of a DC motor can follow any arbitrarily selected trajectories under variab... View full abstract»

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  • Primary safe criterion of earth-brushing flight for flying vehicle over digital surface model

    Publication Year: 2004, Page(s):309 - 314
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1729 KB)

    In modern terrain-following guidance it is an important index for flight vehicle to cruise about safely and normally. On the basis of a constructing method of digital surface model (DSM), the definition, classification and scale analysis of an isolated obstacle threatening flight safety of terrain-following guidance are made. When the interval of verticaland cross-sections on DSM is 12.5 m, the pr... View full abstract»

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  • ERBF network with immune clustering

    Publication Year: 2004, Page(s):315 - 318
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (802 KB)

    Based on immune clustering and evolutionary programming(EP), a hybrid algorithm to train the RBF network is proposed. An immune fuzzy C-means clustering algorithm (IFCM) is used to adaptively specifythe amount and initial positions of the RBF centers according to input data set; then the RBF network is trained with EP that tends to globaloptima. The application of the hybrid algorithm in multiuser... View full abstract»

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  • Approximation methods of mixed l1/H2 optimization problems for MIMO discrete-time systems

    Publication Year: 2004, Page(s):319 - 326
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1430 KB)

    The mixed l1/H2 optimization problem for MIMO (multiple input-multiple output) discrete-time systems is considered. This problem is formulated as minimizing the l1-norm of a closed-loop transfer matrix while maintaining the H2-norm of another closed-loop transfer matrix at prescribed level. The continuity property ofthe optimal value in respect to change... View full abstract»

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  • Autonomous orbit determination for the probe around small body

    Publication Year: 2004, Page(s):327 - 332
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1041 KB)

    The algorithm of autonomous orbit determination for the probe around small body is studied. In the algorithm, first,” the observed images of the body are compared with its pre-computed model of the body to obtain the location of the limb features of the body in the inertial coordinate. Second, the information of the images and features in utilized to obtain the position of the probe using t... View full abstract»

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  • PI tuning for large dead-time processes with a new robustness specification

    Publication Year: 2004, Page(s):333 - 336
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (597 KB)

    A simple PI controller tuning method for large dead-time processes is presented. First, a first-order plus deadtime model is identified on the basis of relay feedback experiments, which Nyquist curve is very close to that of large dead-time processes over a wide frequency range. With the model available, PI controller is designed with a new robust specification. Simulation examples show the effect... View full abstract»

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  • Robust stability test for 2-D continuous-discrete systems with interval parameters

    Publication Year: 2004, Page(s):337 - 343
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1196 KB)

    It is revealed that the dynamic stability of 2-D recursive continuous-discrete systems with interval parameters involves the problem of robust Hurwitz-Schur stability of bivariate polynomials family. It is proved that the Hurwitz Schur stability of the denominator polynomials of the systems is necessary and sufficient for the asymptotic stability of the 2-D hybrid systems. The 2-D hybrid transform... View full abstract»

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  • Global exponential stability for delayed cellular neural networks and estimate of exponential convergence rate

    Publication Year: 2004, Page(s):344 - 349
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (837 KB)

    Some sufficient conditions for the global exponential stability and lower bounds on the rate of exponential convergence of the cellular neural networks with delay (DCNNs) are obtained by means of a method based on delay differential inequality. The method, which does not make use of any Lyapunov functionals, is simple and valid for the stability analysis of neural networks with delay. Some previou... View full abstract»

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Aims & Scope

Journal of Systems Engineering and Electronics reports the latest developments and achievements in both theoretical and practical aspects of systems engineering, electronics and related research areas.

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Editor-in-Chief
Professor Rong Shi
Journal of Systems Engineering and Electronics