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Proceedings Electronic Technology Directions to the Year 2000

23-25 May 1995

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Displaying Results 1 - 25 of 42
  • Proceedings Electronic Technology Directions to the Year 2000

    Publication Year: 1995
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    Freely Available from IEEE
  • A 32-bit GaAs IEEE floating point multiplier using Trailing-1's rounding algorithm

    Publication Year: 1995, Page(s):246 - 252
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    The paper presents a GaAs 32-bit IEEE floating point multiplier. A modified carry save array is used in conjunction with Booth's algorithm to reduce the partial product addition and interconnection. A special rounding technique called Trailing-1's Predictor is used to speed up the final addition and rounding. This chip uses a new layout methodology for easy design structure and improved GaAs techn... View full abstract»

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  • Efficient decomposition of assigned sequential machines and Boolean functions for PLD implementations

    Publication Year: 1995, Page(s):258 - 266
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    Programmable devices impose hard constraints on the size of circuits that can be implemented with them or with their blocks. Therefore, decompositional implementation of large functions is not a choice but a real necessity in this case. The objective of the new decomposition method presented is to implement a complex Boolean function or an assigned sequential machine with a minimal number of const... View full abstract»

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  • Optimum parameters for a pipeline processor

    Publication Year: 1995, Page(s):184 - 188
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    Efficient synthetic aperture radar (SAR) azimuth processing using algorithms suited to pipeline processing has been demonstrated by A. Moreira (1991; 1992; 1994). A triangular window is obtained by cascading two rectangular windows of the same length. It is shown that if their lengths are chosen to differ, an improved sidelobe performance is obtained at no computational cost. A further improvement... View full abstract»

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  • Efficient architectures for operators

    Publication Year: 1995, Page(s):267 - 275
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (580 KB)

    The paper discusses the possibility of high performance computing for restricted classes of algorithms. An analysis of signal processing algorithms has identified a number of common operators which can be implemented efficiently with VLSI technology. The integration of these operators into conventional workstation environments provides the potential for orders of magnitude performance improvements... View full abstract»

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  • Real-time automatic target recognition using an optical correlator

    Publication Year: 1995, Page(s):189 - 193
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    An overview of some recent developments in optical correlator technology is presented. An experimental correlator is described along with experimental results on its ability to discriminate between similar targets. The significance of these developments for real time automatic target recognition (ATR) is addressed. A complete ATR system that incorporates an optical correlator, and which is current... View full abstract»

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  • Control instrumentation-a survey of current practice and some future trends

    Publication Year: 1995, Page(s):278 - 293
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (976 KB)

    The technological advances that have taken place in microelectronics, telecommunication and computer technologies have revolutionised the instrumentation used for measurement and control in today's industries. These applications being largely nonelectrical in nature, the impact has been even more tremendous. Mechanical and chemical engineers have suddenly to grapple with advanced electronic techno... View full abstract»

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  • All-aspect ship recognition in infrared images

    Publication Year: 1995, Page(s):194 - 198
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    The paper describes an investigation of the problem of identifying objects, in particular ships at sea, in infrared images obtained at a variety of angles and scales. The paper covers theoretical and experimental work relating to the choice of feature vectors to describe the images and the application of the this work to the development of a demonstration system View full abstract»

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  • Microcontroller based precision variable-phase phase-shifter

    Publication Year: 1995, Page(s):306 - 312
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (500 KB)

    An analog and digital feedback compensation technique employing an active RC all pass filter is described for obtaining a frequency and amplitude independent, drift free phase shift for sinusoidal signals. While the analog feedback for realising the active R is of conventional type, the digital feedback for controlling C is implemented with a modified successive approximation (SA) technique. The i... View full abstract»

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  • Circuit representation in a logic grammar

    Publication Year: 1995, Page(s):28 - 34
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (388 KB)

    We have developed a new framework to represent circuit structures. A circuit is viewed as a sentence, and its elements as words. Circuit structures are defined by a logic grammar called DCSG (definite clause set grammars), developed for analyzing free word-order language. A set of grammar rules itself forms a logic program which implements top-down parsing. Using the grammar rules, given circuits ... View full abstract»

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  • Moving object area identification using the Radon transform in image sequences

    Publication Year: 1995, Page(s):199 - 204
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB)

    A new moving object area identification method is described in this article. The Radon transform is used to take projections along parallel directions from two consecutive frames in a monocular image sequence while the camera is stationary. The method consists of two stages: motion detection; and identification of moving object areas in rectangular regions. Moving object area identification using ... View full abstract»

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  • Autonomous road vehicle navigation

    Publication Year: 1995, Page(s):68 - 71
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    The US Army Missile Command is conducting a program to develop and demonstrate a simple, low cost machine vision system capable of allowing an unmanned ground vehicle to perform autonomous road following and obstacle avoidance while using a minimum sensor suite. Current work is focused on developing this vision system to perform its function using color and monochrome TV imagery. The first phase o... View full abstract»

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  • Development of a spectrally efficient, high speed modem for microwave terrestrial and satellite communications

    Publication Year: 1995, Page(s):211 - 216
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    The widespread demand for use of the limited radio spectrum lends to the design of high-speed modems which are spectrally efficient. This paper discusses the current work being undertaken on a DSP based modem supporting data rates ranging from 2 Mbit/sec up to 20 Mbit/sec View full abstract»

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  • The use of entropy to focus inverse synthetic aperture radar (ISAR) images

    Publication Year: 1995, Page(s):163 - 168
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (252 KB)

    Inverse synthetic aperture radar (ISAR) images generated of targets which have a large angle of rotation or non-linear rotational motion are blurred if the rotational motion is not taken into account. If the rotational motion is known, the data can be corrected by resampling from the polar grid on which the data is collected, to a rectangular grid. A focused ISAR image can be then formed by using ... View full abstract»

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  • Adaptive fuzzy control systems

    Publication Year: 1995, Page(s):11 - 13
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (188 KB)

    Computer based process control systems have been used successfully for a number of years. However, these systems are often highly mathematical, are difficult to understand and implement, and are also inflexible. Fuzzy logic was developed in the early to mid 1960s by Lotfi Zadeh as an alternative to these complex traditional computer control schemes. Zadeh saw fuzzy logic as a way to achieve proces... View full abstract»

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  • Introduction to artificial neural networks

    Publication Year: 1995, Page(s):36 - 62
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1100 KB)

    A general introduction to the subject of artificial neural networks is given and the tenuous relationship of neural networks to the biological neuron structure of the brain is also briefly outlined. The development of artificial neural networks has been marked by periods of considerable optimism and others of disillusionment. A realistic assessment of the potential of artificial neural networks is... View full abstract»

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  • Simulated flight control using a hybrid neural network/genetic algorithm architecture

    Publication Year: 1995, Page(s):150 - 154
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    A controller for an agile, high-subsonic autonomous flight vehicle, incorporating neural network and genetic algorithm techniques, is presented. Simulated flight results for nominal and off-nominal vehicle configurations are reported. The results show that an inverse dynamic model neural network can offer better tracking performance and greater robustness than a conventional linear controller. How... View full abstract»

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  • Adaptive process control using biologic paradigms

    Publication Year: 1995, Page(s):128 - 136
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (668 KB)

    Researchers at the US Bureau of Mines have combined several biologically oriented techniques into a comprehensive approach to adaptive process control. The three specific techniques from the field of artificial intelligence used to produce the adaptive process control systems are: (1) fuzzy logic, (2) genetic algorithms, and (3) neural networks. Fuzzy logic is a technique in which the human &ldquo... View full abstract»

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  • General fuzzy clustering model and neural networks

    Publication Year: 1995, Page(s):104 - 112
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    This paper defines a generalized structural model of similarity between a pair of objects. We have discussed an additive fuzzy clustering model previously. The merits of the additive fuzzy clustering models are (1) the amount of computations for the identification of the models are much fewer than in a hard clustering model and (2) we obtain a suitable fitness by using fewer number of clusters. Th... View full abstract»

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  • Rotation invariant perimeter and invariant compactness for texture elements

    Publication Year: 1995, Page(s):205 - 210
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    Structural properties of texture elements in a surface have successfully been applied to characterise textures. For this purpose, histograms of texture element's properties are used. Compactness property of an element has been used for characterisation. The compactness depends upon its perimeter. A novel method based on perimeter contribution, to compute the value of perimeter is presented. The pe... View full abstract»

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  • Non-linear adaptive techniques for DOA estimation-a comparative analysis

    Publication Year: 1995, Page(s):72 - 77
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    Linear model based beamforming techniques (e.g. MUSIC, MLM, MVDR, etc.) have been widely used for direction-of-arrival (DOA) estimation which, in terms of statistics, only make use of the first and second order moment information (e.g. the mean and the variance) of the data. In these techniques, the higher order statistics (3rd and 4th order “cumulants”) that provide the information re... View full abstract»

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  • SAR systems resolution reviewed for target classification in knowledge-based environment

    Publication Year: 1995, Page(s):177 - 183
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (508 KB)

    The knowledge based approach to synthetic aperture radar systems which is presented, considers how to utilise given equipment to perform the classification function, rather than providing an image of photographic like resolution for the purpose. The paper shows that dithering multiple carrier centre frequencies results in optimum use of the SAR waveform. Enhanced slant range resolution is achieved... View full abstract»

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  • Micro engineering-a brief overview

    Publication Year: 1995, Page(s):242 - 245
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    We report on the emerging field of microengineering. This novel technology involves the miniaturization of mechanics. Just as miniaturization of electronics has resulted in revolutionary advances, microengineering is poised to produce a revolution of its own. Furthermore, microengineering is based on the technology of microelectronics utilizing the same processes, equipment, and skills. It also re... View full abstract»

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  • Evaluation of classification performance for randomly dithered carrier centre frequency in SAR systems

    Publication Year: 1995, Page(s):169 - 176
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    It has been shown that dithering between carrier centre frequencies results in enhanced slant range resolution, whilst maintaining the same analog to digital converter bandwidth and data storage size. There is a corresponding degradation in the image sidelobe levels. Simulations using a simple classifier are presented to determine the effect on classification performance of resolution and of side-... View full abstract»

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  • Introduction to knowledge-based systems

    Publication Year: 1995, Page(s):18 - 27
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    In the last decade or so, expert systems also called knowledge-based systems have made their way from research laboratories into the real world. Applications have been, and are continuing to be, developed in areas as diverse as business, medicine, manufacturing, defence, astronomy, science and engineering. Such applications perform tasks that include interpretation, prediction, diagnosis, design, ... View full abstract»

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