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2004 International Conference on Communications, Circuits and Systems (IEEE Cat. No.04EX914)

27-29 June 2004

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  • A high quality 4 kb/s multiple pulse-dispersion ACELP speech coder

    Publication Year: 2004, Page(s):923 - 926 Vol.2
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (341 KB) | HTML iconHTML

    Pulse dispersion is a very efficient technology to improve the speech quality of a low bit-rate code-excited linear-prediction (CELP) coder. A novel high quality 4 kb/s algebraic CELP (ACELP) speech coder is presented. Different pulse-dispersion technologies are applied to both encoder and decoder to reduce the adverse effects of the sparse algebraic codebook vector and improve the perceptual qual... View full abstract»

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  • Blind source extraction in various ill-conditioned cases

    Publication Year: 2004, Page(s):1004 - 1007 Vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (353 KB) | HTML iconHTML

    The paper discusses blind source extraction in various ill-conditioned cases based on a simple extraction network model. Extractability is first analyzed for the following ill-conditioned cases: the mixing matrix is square but-singular; the number of sensors is smaller than that of sources; the number of sensors is larger than that of sources, but the column rank of the mixing matrix is deficient;... View full abstract»

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  • The study on mobile Web service computing for data collecting

    Publication Year: 2004, Page(s):1497 - 1501 Vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (315 KB) | HTML iconHTML

    Data collecting and transmitting by wireless network in moving circumstances is a challenging task; until now the solution to similar problems usually takes a tight coupled system, integrated frameworks, which means the appropriative data collecting hard device can only communicate with the right back end device connected with a wired network server. With the development of application framework, ... View full abstract»

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  • Analysis of third-order charge pump PLL

    Publication Year: 2004, Page(s):1372 - 1376 Vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (350 KB) | HTML iconHTML

    In this paper a proper model for third-order CP-PLL is described. It can be easily used in programming for simulation. The difference equations with two important state variables are presented. Theoretical stability and overload limit for the third order CP-PLL are determined. And all the validity is verified by simulation examples. View full abstract»

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  • The robustness design of templates of CNN for detecting inner corners of objects in gray-scale images

    Publication Year: 2004, Page(s):1090 - 1093 Vol.2
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (306 KB) | HTML iconHTML

    The paper presents a theorem for designing the robustness template parameters of cellular neural/nonlinear network (CNN) for extracting inner corners of objects in gray-scale images. The theorem provides parameter inequalities for determining parameter intervals for implementing the corresponding tasks. The designed CNN has a linear A-template and a nonlinear B-template with two thresholds. A firs... View full abstract»

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  • Unequal loss protected multiple description subband coding

    Publication Year: 2004, Page(s):919 - 922 Vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (417 KB) | HTML iconHTML

    A new multiple description coding scheme with unequal loss protection is presented. In this approach, we code the hierarchical tree structure of the wavelet coefficients of the transformed image with an X-tree coder and code significant coefficients with scalar quantization, respectively. Since the hierarchical trees are comprised of the crucial information of the transformed image, zero maps, sig... View full abstract»

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  • A non-data-aided SNR estimation algorithm for QAM signals

    Publication Year: 2004, Page(s):999 - 1003 Vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB) | HTML iconHTML

    We propose a non-data-aided (NDA) signal-to-noise-ratio (SNR) estimation algorithm for quadrature amplitude modulation (QAM) signals in an additive white Gaussian noise (AWGN) channel. The NDA SNR estimation algorithm for QAM signals is derived based on a statistical ratio of observables over a block of data. The simple analysis and computer simulation for some kinds of QAM signals have been done,... View full abstract»

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  • Realize chaotic anti-control for linear controllable systems via scalar controller

    Publication Year: 2004, Page(s):1392 - 1395 Vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB) | HTML iconHTML

    Adding a suitable scalar controller to linear controllable systems, we can realize chaotic anti-control for the linear controllable systems. A method to obtain the scalar controller from chaotic systems is established and demonstrated with two examples. View full abstract»

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  • Location management in mobile environment

    Publication Year: 2004, Page(s):1491 - 1496 Vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB) | HTML iconHTML

    In this paper, we present a comprehensive survey of the various approaches to the problem of storing, querying, and updating the location of objects in a mobile computing environment. We analyse the drawback of point location management, present the research issue for querying the mobile objects, and propose the model of moving objects based on GIS, and research the location query operators. Final... View full abstract»

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  • Applying wavelet analysis in the seasonal adjustment

    Publication Year: 2004, Page(s):747 - 750 Vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (335 KB) | HTML iconHTML

    X-12-ARIMA is a seasonal adjustment method based on different moving averages. Using these moving averages makes it robust, but on the other hand, distorts various components of a time series to some extent, which is its side effect. The frequencies of various components of a time series are different; multi resolution analysis (MRA) of the wavelet analysis may decompose a time series into differe... View full abstract»

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  • Analog computing for real-time solution of time-varying linear equations

    Publication Year: 2004, Page(s):1367 - 1371 Vol.2
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (353 KB) | HTML iconHTML

    An implicit recurrent neural network model (IRNN) is proposed for solving on-line time-varying linear equations. Such a neural network can be implemented as analog circuits or VLSI. Excellent convergent properties have been revealed by careful theoretical analysis. In the specific case where the linear equation is obtained from a time-varying Sylvester equation, the proposed IRNN model coincides w... View full abstract»

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  • Robust adaptive control for a class of nonlinear systems using neural networks

    Publication Year: 2004, Page(s):1086 - 1089 Vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB) | HTML iconHTML

    The adaptive control problem is studied for a class of nonlinear systems in the presence of non-affine uncertainties. By employing radial basis functions (RBFs), a correction control signal is added to a nominal controller to render the actual system bounded. View full abstract»

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  • AL/RTL co-modeling and general test generation

    Publication Year: 2004, Page(s):1329 - 1333 Vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (418 KB) | HTML iconHTML

    Current hardware/software co-design and SOC design often need to handle system descriptions at different abstraction levels. This requires a unified modeling method across the levels to facilitate design validation. This paper addresses the problem of co-modeling across algorithmic level (AL) and register transfer level (RTL). A constraint satisfaction problem (CSP) is utilized to do the modeling.... View full abstract»

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  • An adaptive cross search algorithm for block matching motion estimation

    Publication Year: 2004, Page(s):914 - 918 Vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (357 KB) | HTML iconHTML

    Motion estimation plays an important role in the motion compensated video coding framework. Due to the high computational complexity of the exhaustive search, many sub-optimal fast search algorithms, aiming to achieve the best trade off between distortion and search speed, are proposed. We observe that the distortion gradient of a search point on the block distortion surface (BDS) monotonously dec... View full abstract»

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  • Aligning multiple sequences by genetic algorithm

    Publication Year: 2004, Page(s):994 - 998 Vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (354 KB) | HTML iconHTML

    The paper presents a genetic algorithm for solving multiple sequence alignment in bioinformatics. The algorithm involves four different operators, one type of selection operator, two types of crossover operators, and one type of mutation operator; the mutation operator is realized by a dynamic programming method. Experimental results of benchmarks from the BAliBASE show that the proposed algorithm... View full abstract»

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  • Novel applications of the dielectric resonator

    Publication Year: 2004, Page(s):1456 - 1459 Vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB) | HTML iconHTML

    Unconventional applications of the dielectric resonator are described. These include frequency discriminators implemented in a planar circuit environment, a perturbative method for material property measurement employing a semi-open resonant structure, and dielectric loaded waveguiding structure for particle acceleration. View full abstract»

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  • Research of chaotic classification and synchronization

    Publication Year: 2004, Page(s):1387 - 1391 Vol.2
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB) | HTML iconHTML

    According to the track character of chaotic strange trajectory, classification of chaos is proposed. Continuous-flow chaos, discrete-dot chaos and digital-flow chaos are defined. Different synchronization methods should be developed in allusion to each kind of chaos. This paper describes briefly the synchronization methods which are used in continuous-flow chaos, and emphatically, researches the p... View full abstract»

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  • Architecture analysis of MLP by geometrical interpretation

    Publication Year: 2004, Page(s):1042 - 1046 Vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (427 KB) | HTML iconHTML

    Traditionally, the main focus regarding the architecture selection of a multilayer perceptron (MLP) has been centered upon the growing and pruning and the evolutionary algorithms, in which a priori information regarding the geometrical shape of the target function is usually not exploited. In contrast to this, we demonstrate that it is the geometrical information that can simplify the task of arch... View full abstract»

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  • A logistic prototype system based on GIS and GPS

    Publication Year: 2004, Page(s):1485 - 1490 Vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (366 KB) | HTML iconHTML

    Logistics has become a fast-growing industry in recent years. According to its practical needs, it has integrated transportation, storage, loading and unloading, disposal and information processing. Lacking real-time information is a key problem for making an immediate decision. In this paper the author first analyzes the new requirements of logistics after a brief introduction. Further, the autho... View full abstract»

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  • Frequency domain interpolation wavelet transform based algorithm for harmonic analysis of power system

    Publication Year: 2004, Page(s):742 - 746 Vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (361 KB) | HTML iconHTML

    A power system harmonic detection technique based on a frequency domain interpolation wavelet transform is proposed. Aiming at harmonic detection, a fast Fourier transform (FFT) can only detect integer harmonics; a short time Fourier transform (STFT) can detect non-integer harmonics with low resolution; a wavelet transform can detect non-integer harmonics, but it has spectral aliasing and spectral... View full abstract»

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  • Pitch recognition based on intelligent neural network system

    Publication Year: 2004, Page(s):1081 - 1085 Vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (389 KB) | HTML iconHTML

    Pitch detection may be used in content-based classification and retrieval of music and audio. Most pitch detection algorithms are based on the relationship between frequency and note; however, when the pitch is hummed by an untrained person, the accuracy of pitch recognition can obviously decline. A new intelligent pitch recognition (IPR) method based on intelligent neural networks is presented. U... View full abstract»

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  • What if merging connection and switch boxes - an experimental revisit on FPGA architectures

    Publication Year: 2004, Page(s):1295 - 1299 Vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (419 KB) | HTML iconHTML

    We propose a new FPGA architecture using the connection-switch box (CS-box). It is based on the symmetric-array FPGA architecture and combines the connection box and the switch box. Two algorithms are designed to build the switches inside CS-boxes, one for logic pins and the other for pad pins. After a theoretical analysis and comparison, we conducted extensive experiments on MCNC benchmark circui... View full abstract»

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  • A novel method for defect location using Iddq

    Publication Year: 2004, Page(s):1325 - 1328 Vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB) | HTML iconHTML

    A novel algorithm for fault location using Iddq has been presented in this paper. A significant advantage of this method is that it can effectively locate multiple defects in a circuit. An experiment used to illuminate this algorithm is discussed in detail. View full abstract»

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  • Performance analysis of acceleration resolution for the LFMCW radar

    Publication Year: 2004, Page(s):887 - 890 Vol.2
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (305 KB) | HTML iconHTML

    Aiming at the influence of high acceleration modulation of the linear FMCW (LFMCW) radar echo signal in the short range and high resolution applications on missiles, satellites, and planes, we derive the expression of acceleration resolution for the LFMCW signal. It is concluded that the acceleration resolution is inversely proportional to the square of the effective time width. We also analyze th... View full abstract»

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  • A fingerprint minutiae matching approach based on vector triangle method and ridge structure

    Publication Year: 2004, Page(s):871 - 875 Vol.2
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB) | HTML iconHTML

    Fingerprint matching is one of the most important problems in an automatic fingerprint identification system (AFIS). In general, we use minutiae such as ridge ending and ridge bifurcation to represent a fingerprint and realize fingerprint matching through minutiae matching. We propose a minutiae matching method based on the vector triangle. This method incorporates the information of ridge lines i... View full abstract»

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