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IEEE International Conference on Image Processing

作者： G.-O. Glentis C.H. Slump O.E. Herrmann Department of Electrical Engineering Control Systems and Computer Engineering Group BSC Laboratory for Network Theory and VLSI-Design University of Twente Enschede Netherlands

In this paper a fast spatial adaptive algorithm is presented for the efficient least squares (LS), autoregressive exogenous (ARX), two-dimensional (2-D) modeling. Filter masks of general boundaries are allowed. Efficient space updating recursions are developed by exploiting the spatial shift invariance property of the 2-D data set.< >

关键词： Least squares methods Finite impulse response filter Image edge detection Equations Shape Vectors Control systems Control engineering computing computer networks Systems engineering and theory

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FISOFM: firearms identification based on SOFM model of neural network

FISOFM: firearms identification based on SOFM model of neura...

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International Carnahan Conference on Security Technology

作者： Chenyuan Kou Cheng-Tan Tung Fu Neural Network Laboratory EC528 Institute of Computer Science and Information Engineering National Chiao Tung University Hsinchu Taiwan

Firearms identification (FI) has been becoming a serious and increasing part of crime investigation for the last two decades. We propose a solution to FI using Neural network (NN) technology. Lots of methods have been using in FI such as extractor mark, breach mark, ejector mark, and chambering mark identification, etc. We choose the chambering mark identification as our method in this research. It is a simple and useful method for crime investigation. Because of the principle of tool mark, we may identify the firearms. The chambering mark needs to be scanned, preprocessed, segmented, described, reduced and enhanced, and will be recognized by its individual characteristic via the Self-Organizing Feature Map(SOFM) model of NN. It will ease the burden of forensic laboratory's because they do not need to identify the tool mark via microscope.< >

关键词： Artificial intelligence Self-organizing feature maps Pattern recognition

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Measurement results of the DTCNN-universal chip

Measurement results of the DTCNN-universal chip

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Proceedings of the International Conference on Microelectronics for Neural networks and Fuzzy Systems

作者： H. Harrer J.A. Nossek T. Roska L.O. Chua Institute for Network Theory and Circuit Design Technical University Munich Munich Germany Analogic (Dual) and Neural Computer Laboratory Hungarian Academy of Sciences (ATOMKI) Budapest Hungary Department of Electrical Engineering and Computer Sciences University of California Berkeley Berkeley CA USA

The paper gives the measurement results of the analog current-mode implementation of discrete-time cellular-neural networks, which has been described by Harrer et al. (1994). A chip for an analog programmable network was fabricated with the ORBIT 2.0 /spl mu/m process containing 12 by 12 regular cells and 52 border cells. The effective chip area amounts to 0.38 cm/sup 2/ with a power consumption of 0.8 W. The measurements include the statistical distribution of the 2880 cascoded current mirrors and the dynamic processing of the connected component detector, the shadow detector, the increasing and decreasing of objects with a clock frequency of 1 MHz.

关键词： Semiconductor device measurement Extraterrestrial measurements Current measurement Object detection Detectors Energy consumption Area measurement Power measurement Frequency measurement Statistical distributions

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TECHNICAL ISSUES REGARDING SATELLITE PACKET-SWITCHING

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INTERNATIONAL JOURNAL OF SATELLITE COMMUNICATIONS 1994年第3期12卷 257-267页

作者： IVANCIC, WD CHU, P SHYY, DJ National Aeronautics and Space Administration Lewis Research Center Cleveland Ohio 44135 USA. A design engineer in the Digital Technology Branch of the Space Electronics Division. He has extensive experience in satellite communications systems modulation and coding on-board switching and routeing and high speed digital design. Since joining NASA in 1982 Mr. Ivancic has been responsible for the development of a variety of matrix switch controllers ground terminal equipment numerous pieces of special test equipment a beacon controller for the SARSAT program (Search and Rescue Satellite) and a time-shared decoder for a processing satellite. In addition Mr. Ivancic has been technical contract monitor on a number of advanced communications technology contracts including the Advanced Modulation Technology Development a 5 GHz fibre-optic link and multi-programmable modem study. He was awarded the B.S.E.E. and M.S.E.E. degrees by Cleveland State University in 1982 and 1986 respectively. Cleveland State University Cleveland Ohio 44115 USA. Currently an assistant professor of Electrical Engineering Department at Cleveland State University. He obtained the M.S. and Ph.D. degrees from Iowa State University majoring in Electrical and Computer Engineering. His research interests include high-speed computer networks digital systems and neural networks applications. He is a member of Sigma Xi Phi Kappa Phi as well as the IEEE and ACM. ComSearch Reston Virginia 22091 USA. Received the B.S. degree in electrical engineering from National Chiao-Tung University Hsin-Chu Taiwan in 1983 and the M.S. and Ph.D. degrees in electrical engineering from Georgia Institute of Technology Atlanta GA in 1986 and 1990 respectively. From June 1987 to October 1987 he worked for the Department of Neurology Emory University Atlanta as a Programmer. From September 1989 to December 1989 he worked for the Advanced Development Laboratory. AMP Inc. Atlanta as a Test Engineer. From February 1990 to August 1993 he wor

Many concepts for advanced communication satellite networks have recently been proposed. Critical technical issues relating to satellite packet switching for meshed very small aperture terminal networks and broadband ... 详细信息

关键词： FAST PACKET SWITCH BISDN MESHED VSAT ON-BOARD PROCESSING

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A SIMPLE, ACCURATE METHOD TO CALCULATE SPREAD-SPECTRUM MULTIPLE-ACCESS ERROR PROBABILITIES

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IEEE TRANSACTIONS ON COMMUNICATIONS 1992年第3期40卷 461-464页

作者： HOLTZMAN, JM Wireless Information Network Laboratory (WINLAB) Department of Electrical and Computer Engineering Rutgers University Piscataway NJ USA

There have been many papers on the calculation of error probabilities for direct sequence spread spectrum multiple access (DS/SSMA) systems. The exact calculation is computationally difficult so emphasis has been on approximations and bounds. One particularly attractive approximation is to just use a signal-to-noise ratio in a Gaussian approximation, the "standard approximation." Unfortunately, that approximation is not generally accurate enough. An improved Gaussian approximation with good accuracy has recently been presented. We derive an accurate Gaussian approximation which is also computationally very simple.

关键词： Spread spectrum communication Gaussian approximation Error probability Signal to noise ratio Random variables Lifting equipment Computational complexity Information analysis Accuracy Communication standards

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ON CALCULATING BIT ERROR-PROBABILITY FOR CONVOLUTIONAL CODING OVER THE RICIAN FADING CHANNEL 42

ON CALCULATING BIT ERROR-PROBABILITY FOR CONVOLUTIONAL CODIN...

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42ND CONF OF THE VEHICULAR TECHNOLOGY SOC - FRONTIERS OF TECHNOLOGY : FROM PIONEERS TO THE 21ST CENTURY

作者： SIMPSON, F HOLTZMAN, J Wireless Information Network Laboratory (WINLAB) Department of Electrical and Computer Engineering Rutgers State University of New Jersey P.O. Box 909 Piscataway 08855-0909 NJ United States

ISBN: (纸本)0780306732

In [1], an upper bound was used for the bit error probability of a conventional Viterbi convolutional decoder with transmission through a fading channel. The channel differed from a standard Rayleigh or Rician channel for two reasons: 1) The Rayleigh fading effect was mitigated by the bandwidth spreading of DS/CDMA. 2) Power control further modified the received signal. A multivariate dependent Gaussian model was used to represent the combined effect of (1) and (2). In this paper, the full derivation of that result is given and comparisons are made between our bound and other similar bounds, as well as to simulations on the Rician channel. The Rician channel results were used to test the robustness of the Gaussian assumption. Although not originally intended for this application, our bound is found to be accurate when compared to simulations and to other analytical bounds in certain parameter regions. The results are appealing for their simplicity. © 1992 IEEE.

关键词： Fading channels

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On Calculating Ds/ssma Error Probabilities

On Calculating Ds/ssma Error Probabilities

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IEEE International Symposium on Spread Spectrum Techniques and Applications

作者： J.M. Holtzman WINLAB Wireless Information Network Laboratory) Department of Electrical and Computer Engineering Rutgers University Piscataway NJ USA

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On calculating bit error probability for convolutional coding over the Rician fading channel

On calculating bit error probability for convolutional codin...

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IEEE Conference on Vehicular Technology (VTC)

作者： F. Simpson J. Holtzman Wireless Information Network Laboratory (WINLAB) Department of Electrical and Computer Engineering Rutgers State University of New Jersey Piscataway NJ USA

The full derivation of an upper bound previously given by the authors (see Proc. IEEE Veh. Tech. Conf., St. Louis, USA, p.362-7, 1991) is provided, and comparisons are made between the authors' bound and other similar bounds, as well as to simulations on the Rician channel. The Rician channel results were used to test the robustness of the Gaussian assumption. Although not originally intended for this application, the authors' bound is found to be accurate when compared to simulations and to other analytical bounds in certain parameter regions.< >

关键词： Error probability Convolutional codes Rician channels Multiaccess communication Convolution Upper bound Viterbi algorithm Decoding Fading Rayleigh channels

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NONLINEAR TRANSIENT ANALYSIS OF COUPLED RLGC LINES BY THE METHOD OF CHARACTERISTICS

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INTERNATIONAL JOURNAL OF MICROWAVE AND MILLIMETER-WAVE computer-AIDED engineering 1992年第2期2卷 108-115页

作者： ORHANOVIC, N TRIPATHI, VK Department of Electrical and Computer Engineering Oregon State University Corvallis Oregon 97331 Neven Orhanovic was born in Osijek Croatia on July 131964. He received the Dipl. Ing. degree in electrical engineering from the University of Zagreb Croatia where he studied from 1983 to 1988. He received the M.S. degree in electrical engineering from Oregon State University Corvallis in 1990. Presently he is a Research Assistant at Oregon State University in the Department of Electrical and Computer Engineering where he is working towards a PhD degree. His areas of interest include electromagnetic simulation of microwave components and circuits. Vijai K. Tripathi received the BSc degree from Agra University Uttar Pradesh India in 1958 the MSc Tech degree in electronics and radio engineering from Allahabad University Uttar Pradesh. India in 1961 and the MSEE and PhD degrees in electrical engineering from the University of Michigan Ann Arbor in 1964 and 1968 respectively. From 1961 to 1963 he was a Senior Research Assistant at the Indian Institute of Technology Bombay India. In 1963 he joined the Electron Physics Laboratory of the University of Michigan where he worked as a Research Assistant from 1963 to 1965 and as a Research Assistant from 1966 to 1967 on microwave tubes and microwave solid-state devices. From 1968 to 1973 he was an assistant Professor of Electrical engineering at the University of Oklahoma. Norman. In 1974 he joined Oregon State University Corvallis where he is a Professor of Electrical and Computer Engineering. His visiting and sabbatical appointments have included the Division of Network Theory at Chalmers University of Technology in Gothenburg Sweden from November 1981 through May 1982: Duisburg University Duisburg Germany from June through September 1982 and the Electronics Technology Division of the Naval Research Laboratory in Washington. D.C. in the summer of 1984. His current research activities are in the areas of microwave circuits and devices electro

A computationally efficient numerical technique for the evaluation of the time domain response of coupled lossy uniform and nonuniform transmission lines terminated in general nonlinear elements is presented. The technique is based on the method of characteristics where the original system of coupled transmission line equations is transformed into a system of ordinary differential equations which hold along a family of characteristic curves. An algorithm to solve these equations is presented. The procedure is applicable to both uniform and nonuniform coupled systems and examples of two and three line structures terminated in linear and nonlinear elements are included to demonstrate the versatility and the usefulness of the algorithm.

关键词： Mathematical Techniques

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CDMA power control, interleaving, and coding

CDMA power control, interleaving, and coding

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IEEE Conference on Vehicular Technology (VTC)

作者： F. Simpson J. Holtzman Wireless Information Network Laboratory(WINLAB) Department of Electrical and Computer Engineering State University of New Jersey Piscataway NJ USA

Models of power control are developed and analyzed working with other aspects of CDMA (code division multiple access) systems, such as interleaving and coding on the land mobile radio channel. The basic view is that a power control scheme is keeping the received powers at the base station almost equal, and the performance degradation incurred will be quantified if the powers are not exactly equal. The performance implications of control latency and a maximum speech delay constraint is considered. It is shown that power control and interleaving operate, to some degree, in complementary parameter regions.< >

关键词： Multiaccess communication Power control Interleaved codes Base stations Delay Speech Power system modeling Land mobile radio Capacity planning Error probability

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