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ELECTROMAGNETIC MODELING OF PASSIVE CIRCUIT ELEMENTS IN MMIC

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES 1992年第9期40卷 1741-1747页

作者： CHANG, DC ZHENG, JX MIMICAD Center Department of Electrical and Computer Engineering University of Colorado Boulder Boulder CO USA

A spatial-domain mixed-potential integral equation method is developed for the analysis of microstrip discontinuities and antennas of arbitrary shape. The algorithm is based on roof-top basis functions on a rectangular and triangular mixed grid and analytical evaluation of the quadruple moment integrals involved. The algorithm is successfully implemented into an accurate, efficient and versatile computer program. The numerical results agree with the measured ones very well.

关键词： Electromagnetic modeling Passive circuits MMICs Microstrip antennas Frequency Integral equations Shape Permeability Dielectric substrates algorithm design and analysis

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INVERSE HALF-TONING USING BINARY PERMUTATION FILTERS

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IEEE TRANSACTIONS ON IMAGE PROCESSING 1995年第9期4卷 1296-1311页

作者： KIM, YT ARCE, GR GRABOWSKI, N UNIV DELAWARE DEPT ELECT ENGNNEWARKDE 19716 SAMSUNG ELECTR CO CTR SIGNAL PROC RES & DEVSUWONSOUTH KOREA

The problem of reconstructing a continuous-tone image given its ordered dithered halftone or its error-diffused halftone image is considered, We develop a modular class of nonlinear filters that can reconstruct the continuous-tone information preserving image details and edges that provide important visual cues, The proposed nonlinear reconstruction algorithms, denoted as binary permutation filters, are based on the space and rank orderings of the halftone samples provided by the multiset permutation of the ''on'' pixels in a halftone observation window, For a given window size, we obtain a wide range of filters by varying the amount of space-rank ordering information utilized in the estimate, For image reconstructions from ordered dithered halftones, we develop periodically space-varying filters that can account for the periodical nature of the underlying screening process, A class of suboptimal but simpler space-invariant reconstruction filters are also proposed and tested, Constrained LMS type algorithms are employed for the design of reconstruction filters that minimize the reconstruction mean squared error, We present simulations showing that binary permutation filters are modular, robust to image source characteristics, and that they produce high visual quality image reconstruction.

关键词： Image reconstruction algorithm design and analysis Signal processing algorithms Plasma displays Image resolution Nonlinear filters Reconstruction algorithms Information filtering Information filters Testing

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The Spiral Optimization algorithm: Convergence Conditions and Settings

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IEEE TRANSACTIONS ON SYSTEMS MAN CYBERNETICS-SYSTEMS 2020年第1期50卷 360-375页

作者： Tamura, Kenichi Yasuda, Keiichiro Tokyo Metropolitan Univ Dept Elect & Elect Engn Tokyo 1920397 Japan

The spiral optimization (SPO) algorithm proposed by Tamura and Yasuda is a relatively novel and simple search concept inspired by natural spiral phenomena. This algorithm searches continuous space using no gradient and only spiral trajectories composed of spiral vectors generated by deterministic spiral models. The primary purpose of this paper is to propose conditions and settings that mathematically ensure the convergence of the SPO algorithm to a stationary point. The conditions relating to the sizes and directions of the spiral vectors and the initial search points are based on direct search theory and recent SPO algorithm theories. The presented convergence was numerically verified using test functions with different properties.

关键词： Spirals Heuristic algorithms Convergence Trajectory algorithm design and analysis Optimization Linear programming Convergence direct search nature-inspired computation spiral optimization (SPO) algorithm stationary point

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A VLSI implementation of dual AC-3 and MPEG-2 audio decoder

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IEEE TRANSACTIONS ON CONSUMER ELECTRONICS 1998年第3期44卷 872-877页

作者： Ko, WS Yoo, SK Park, SW Kim, JS Youn, DH Yonsei Univ Dept Elect Engn ASSP Lab Seoul 120749 South Korea Yonsei Univ Dept Med Engn Seoul 120749 South Korea

This paper presents a dual AC-3 and MPEG-2 audio decoder which can decode both bit-streams. MPEG-2 synthesis filtering is modified by the 32-point FFT to share the common data path with the AC-3's. The architecture of the decoder consists of a programmable DSP cole and a hardwired common synthesis filter. The DSP core was designed suitable for audio processing. The common filter design adopts the suggested II MPEG-2 modified synthesis filtering. The proposed system was synthesized with 0.6 mu m technology and proven to be cost-effective.

关键词： Very large scale integration Decoding Filters Digital signal processing algorithm design and analysis Filtering algorithms Hardware Logic design Partitioning algorithms Read only memory

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Multi-Objective Material Generation algorithm (MOMGA) for Optimization Purposes

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IEEE ACCESS 2022年 10卷 107095-107115页

作者： Nouhi, Behnaz Khodadadi, Nima Azizi, Mahdi Talatahari, Siamak Gandomi, Amir H. Univ Tabriz Dept Math Sci Tabriz 51666 Iran Florida Int Univ Coll Engn & Comp Dept Civil & Environm Engn Miami FL 33199 USA Univ Tabriz Dept Civil Engn Tabriz 51666 Iran Univ Technol Sydney Fac Engn & Informat Technol Ultimo NSW 2007 Australia Obuda Univ Univ Res & Innovat Ctr EKIK H-1034 Budapest Hungary RMIT Univ Sch Engn Melbourne Vic 3001 Australia

Optimization is a process of decision-making in which some iterative procedures are conducted to maximize or minimize a predefined objective function representing the overall behavior of a considered system problem. Most of the time, one specific function cannot represent the overall behavior of a system with particular levels of complexity, so the multiple objective functions should be determined for this purpose which requires an algorithm with adaptability to this situation. Multi-objective optimization is a process of decision making in which maximization or minimization of multiple objective functions is considered for reaching the acceptable levels of performance for the considered system problem. In this paper, the multi-objective version of the Material Generation algorithm (MGA) is proposed as MOMGA, one of the recently developed metaheuristic algorithms for single-objective optimization. To evaluate the overall performance of the MOMGA, the benchmark multi-objective optimization problems of the Competitions on Evolutionary Computation (CEC) are considered alongside the real-world engineering problems. Based on the results, the MOMGA is capable of providing very acceptable results in dealing with multi-objective optimization problems.

关键词： Metaheuristics Evolutionary computation Chemical reactions Chemical compounds Heuristic algorithms algorithm design and analysis Machine learning algorithms Material generation algorithm multi-objective optimization real-world engineering problems competitions on evolutionary computation

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Mobility Management and Control protocol for wireless ATM networks

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IEEE NETWORK 1998年第4期12卷 19-27页

作者： Kaloxylos, A Hadjiefthymiades, S Merakos, L Univ Athens Commun Network Lab GR-10679 Athens Greece

The introduction of wireless ATM in customer premises network environments necessitates the design of mobility signaling protocols, sir versions of B-ISDN since the existing deployed either as signaling do not support terminal mobility. Such protocols can extensions to the standard signaling capabilities, or as individual solutions that have little or no impact on existing infrastructures (switches, signaling software, etc.). AWATM architecture that adopts the latter approach is presented. After a discussion of the problems encountered in the integration of wireless networking and B-ISDN ATM technologies, a Mobility Management and Control (MMC) protocol is proposed Finally, in the framework of the proposed MMC protocol, algorithms for implementing mobility procedures (handover and registration) are described.

关键词： Mobile radio mobility management Wireless application protocol Asynchronous transfer mode Signal design B-ISDN Switches Computer architecture Environmental management Technology management algorithm design and analysis

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analysis OF algorithmS FOR VELOCITY ESTIMATION FROM DISCRETE POSITION VERSUS TIME DATA

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IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS 1992年第1期39卷 11-19页

作者： BROWN, RH SCHNEIDER, SC MULLIGAN, MG Department of Electrical and Computer Engineering Marquette University Milwaukee WI USA

This paper investigates algorithms for constructing velocity approximations from discrete position versus time data. The study is limited to algorithms suitable to provide velocity information in discrete-time feedback control systems such as microprocessor-based systems with a discrete position encoder. Velocity estimators based on lines per period, reciprocal-time, Taylor series expansions, backward difference expansions, and least-square curve fits are presented. Based on computer simulations, comparisons of relative accuracies of the different algorithms are made. The least-squares velocity estimators filtered the effect of imperfect measurements ("noise") best, whereas the Taylor series expansions and backward difference equation estimators respond better to velocity transients.

关键词： algorithm design and analysis Optical filters Time measurement Velocity measurement Delay estimation Sampling methods Taylor series Motion control Least squares approximation Computer errors

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Worst-case quadratic loss bounds for prediction using linear functions and gradient descent

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IEEE TRANSACTIONS ON NEURAL NETWORKS 1996年第3期7卷 604-619页

作者： CesaBianchi, N Long, PM Warmuth, MK DUKE UNIV DEPT COMP SCI DURHAM NC 27708 USA UNIV CALIF SANTA CRUZ DEPT COMP SCI SANTA CRUZ CA 95064 USA

In this paper we study the performance of gradient descent (GD) when applied to the problem of on-line linear prediction in arbitrary inner product spaces, We prove worst-case bounds on the sum of the squared prediction errors under various assumptions concerning the amount of a priori information about the sequence to predict, The algorithms we use are variants and extensions of on-line GD, Whereas our algorithms always predict using linear functions as hypotheses, none of our results requires the data to be linearly related. In fact, the bounds proved on the total prediction loss are typically expressed as a function of the total loss of the best fixed linear predictor with bounded norm, All the upper bounds are tight to within constants, Matching lower bounds are provided in some cases. Finally, we apply our results to the problem of on-line prediction for classes of smooth functions.

关键词： Prediction algorithms Predictive models Computer science Upper bound algorithm design and analysis

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ADVANCED DIGITAL RECEIVER PRINCIPLES AND TECHNOLOGIES FOR PCS

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IEEE COMMUNICATIONS MAGAZINE 1995年第1期33卷 68-78页

作者： MEYR, H SUBRAMANIAN, R AT&T BELL LABS HOLMDEL NJ 07733 USA

The synergy between digital radio communications and VLSI signal processing is revolutionizing the design of wireless terminals. Driving this synergy are certain fundamental paradigms in modern communication theory, digital signal processing, and VLSI design. The authors discuss the modern centers-of-gravity model, which they believe is emerging as the basis for the successful design and implementation of advanced digital communication systems. Central to this model are design principles that enable engineers to systematically derive digital receiver structures and explore algorithm and architecture trade-offs using sophisticated tools. Digital signal processing technology is critical in the implementation of these digital receiver structures efficiently. Finally, CAD tools for digital communications system design and design space exploration are shown to be of crucial importance in the efficient execution of these designs.< >

关键词： Personal communication networks Digital communication Digital signal processing Very large scale integration Signal design Receivers Process design algorithm design and analysis design engineering Systems engineering and theory

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A new triple-layer OTC channel router

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IEEE TRANSACTIONS ON COMPUTER-AIDED design OF INTEGRATED CIRCUITS AND SYSTEMS 1996年第9期15卷 1059-1070页

作者： Kim, JW Kang, SM UNIV ILLINOIS DEPT ELECT ENGNURBANAIL 61801

We propose a new algorithm for a triple-layer over-the-cell (OTC) routing in an irregular cell area, While other OTC routers assume that the cell structure is restricted to a certain type such as uniform height, our OTC router accepts both standard cells and custom cells. Our OTC channel routing consists of five steps: i) double-layer routing, ii) track-to-metal3 transformation, iii) segment-to-metal3 transformation, iv) segment-to-metal1 transformation, and v) triple-layer routing, We prove that the transformation steps can be executed in linear time. The effectiveness of our algorithm is demonstrated through physical circuit layouts with fully customized cells, Our algorithm is applied to route MCNC benchmark circuits and Deutsch's difficult problem resulting in a significant reduction in channel area.

关键词： Routing Circuits Nonhomogeneous media Rails Large scale integration Logic Synthesizers algorithm design and analysis

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