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designING A CUSTOM DSP CIRCUIT USING VHDL

IEEE MICRO 1990年第5期10卷 46-53页

作者： KUMAR, KA PETRASKO, B Intermetrics Inc. USA University of Central FL USA

The application of VHDL (VHSIC hardware description language) in the design and development of a custom DSP (digital signal processing) complex-to-magnitude circuit is described. The circuit produces the magnitude of a complex number using an approximation algorithm. The target implementation is a bit-serial architecture using a set of primitive operators for DSP design. The algorithm and architecture are investigated at the word level using the real-number type, and the results are applied to the bit level. It is found that VDHL provides strong support and clear documentation for each level of abstraction.

关键词： Digital signal processing algorithm design and analysis Signal processing algorithms Process design Signal design design automation Application specific integrated circuits Integrated circuit synthesis Concurrent computing design methodology

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Data-Driven Formal Reasoning and Their Applications in Safety analysis of Vehicle Autonomy Features

IEEE DESIGN & TEST

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IEEE design & TEST 2018年第3期35卷 31-38页

作者： Fan, Chuchu Qi, Bolun Mitra, Sayan Univ Illinois Elect & Comp Engn Dept Champaign IL 61801 USA Univ Illinois Comp Sci Dept Champaign IL USA Univ Illinois Elect & Comp Engn Champaign IL USA

Analyzing the safety of automotive systems at the application level is -especially challenging as often very complex or even incomplete models are available. The authors combine formal reasoning with simulation data t... 详细信息

关键词： Vehicle safety algorithm design and analysis Analytical models Computational modeling Sensitivity analysis Mathematical model Autonomous vehicles Automotive engineering

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COMPARISON OF DC OFFSET EFFECTS IN 4 LMS ADAPTIVE algorithmS

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IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-ANALOG AND DIGITAL SIGNAL PROCESSING 1995年第3期42卷 176-185页

作者： SHOVAL, A JOHNS, DA SNELGROVE, WM CARLETON UNIV DEPT ELECTROTTAWAON K1S 5B6CANADA

It is well known that de offsets degrade the performance of analog adaptive filters. In this paper, the effects of de offsets on four variations of the stochastic gradient algorithm are analyzed. Assuming a Gaussian probability distribution for the input signal and error signal, the output mean squared error (MSE) performance in the presence of de offsets is evaluated for each of the algorithms. The theoretical work is compared with computer simulations and the results, together with convergence properties of each of the algorithms and their respective hardware requirements, are used in selecting the most appropriate algorithm. Although a Gaussian input distribution is assumed, it may reasonably be inferred that the critical results obtained should also hold for other input distributions.

关键词： Least squares approximation Adaptive algorithm Computer errors Degradation Adaptive filters Stochastic processes algorithm design and analysis Probability distribution Computer simulation Convergence

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A Heuristic Combinatorial Optimization algorithm for Load-Leveling and Peak Demand Reduction using Energy Storage Systems

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ELECTRIC POWER COMPONENTS AND SYSTEMS 2017年第19期45卷 2093-2103页

作者： Agamah, Simon U. Ekonomou, Lambros City Univ London Dept Elect & Elect Engn Northampton Sq London EC1V 0HB England

A method for applying combinatorial optimization algorithms to Energy Storage System (ESS) scheduling is presented in this paper. Scheduling is essential for the integration of ESS in electrical networks at grid level or at consumer level to achieve the objectives of integration such as constraint management or energy cost reduction and for efficient storage dispatch. It also shows that for a time-of-use (ToU) tariff scheme based on the shape of the demand profile with higher prices tied to peak periods, effective load-leveling, and peak demand reduction always leads to energy cost reduction. While other methods usually require more information such as generation cost curves or ToU tariffs to schedule ESS, the proposed method uses only demand profile information and ESS parameters to achieve load-leveling and peak demand reduction and also considers the entire optimization time horizon. This is done by combining heuristic bin packing and subset sum algorithms with specific modifications to the standard forms and through transformations. A case study is presented in which the algorithm is used to schedule household ESS with repurposed electric vehicle batteries and the results are compared to a demand response scheme on the same setup.

关键词： algorithm design and analysis battery management systems demand response energy storage heuristic algorithms optimization power engineering computing power distribution

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LEARNING IN LINEAR NEURAL NETWORKS - A SURVEY

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IEEE TRANSACTIONS ON NEURAL NETWORKS 1995年第4期6卷 837-858页

作者： BALDI, PF HORNIK, K CALTECH DIV BIOLPASADENACA 91109 VIENNA TECH UNIV INST STAT & WAHRSCHEINLICHKEITSTHEORIEA-1040 VIENNAAUSTRIA

Networks of linear units are the simplest kind of networks, where the basic questions related to learning, generalization, and self-organization can sometimes be answered analytically, We survey most of the known results on linear networks, including: 1) backpropagation learning and the structure of the error function landscape, 2) the temporal evolution of generalization, and 3) unsupervised learning algorithms and their properties, The connections to classical statistical ideas, such as principal component analysis (PCA), are emphasized as well as several simple but challenging open questions, A few new results are also spread across the paper, including an analysis of the effect of noise on backpropagation networks and a unified view of all unsupervised algorithms.

关键词： Intelligent networks Neural networks Unsupervised learning Backpropagation algorithms Principal component analysis Neurons Computer networks Evolution (biology) algorithm design and analysis Biology computing

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analysis of an N-way radial cavity divider with a coaxial central port and waveguide output ports

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IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES 1996年第11期44卷 2010-2016页

作者： Bialkowski, ME Waris, VP Department of Electrical and Computer Engineering University of Queensland QLD Australia

A held matching technique is used to analyze an N-way divider which includes a radial cavity with a coaxial central port and H-plane coupled rectangular waveguide output ports, Dielectric coated and disc ended probes at the central port are considered. The analysis is divided into two parts, Part one is associated with the modeling of the central port and part two is concerned with the modeling of the waveguide peripheral ports. The analysis is simplified by assuming that the interaction between the central port and the peripheral ports is by means of axially symmetric radial waves which are uniform with cavity's height. Based on this analysis, algorithms are developed for calculating the scattering parameters of this structure using a PC. These algorithms show good agreement when tested against a finite element package (HFSS) and against measurements.

关键词： Coaxial components Couplings Rectangular waveguides Dielectrics Probes Waveguide components algorithm design and analysis Scattering parameters Testing Finite element methods

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Fault Modeling and Worst-Case Test Vectors for Delay Failures Induced by Total Dose in ASICs

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IEEE TRANSACTIONS ON NUCLEAR SCIENCE 2012年第6期59卷 2930-2935页

作者： Abou-Auf, Ahmed A. Abdel-Aziz, Mostafa M. Abdel-Aziz, Hamzah A. Wassal, Amr G. Talkhan, Ihab E. Amer Univ Cairo Dept Elect Engn New Cairo 11835 Egypt Cairo Univ Dept Comp Engn Cairo 11835 Egypt

We analyzed the delay failure induced in standard-cell ASICs by total-ionizing dose. We developed a novel cell-level fault model for delay failures. We used this fault model to identify worst-case test vectors (WCTV) for delay failures induced in ASIC devices exposed to total ionizing dose. The fault model was experimentally validated using SPICE simulation and total dose data. We introduced a fast search algorithm based on directed graph and genetic algorithms to help identify WCTV for large ASICs within reasonable search time. The methodology was validated using ASIC test chip and Cobalt 60 facility.

关键词： CMOS technology Application specific integrated circuits Failure analysis algorithm design and analysis Genetic algorithms total dose CMOS delay failure test vectors

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PERFORMANCE-CHARACTERISTICS OF THE MEDIAN LMS ADAPTIVE FILTER

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IEEE TRANSACTIONS ON SIGNAL PROCESSING 1993年第2期41卷 667-680页

作者： WILLIAMSON, GA CLARKSON, PM SETHARES, WA UNIV WISCONSIN DEPT ELECT & COMP ENGN MADISON WI 53706 USA

The performance of gradient search adaptive filters, such as the least mean squares (LMS) algorithm, may degrade badly when the filter is subjected to input signals which are corrupted by impulsive interference. The median 1,MS (MLMS) adaptive filter is designed to alleviate this problem by protecting the filter coefficients from the impact of the impulses. MLMS is a modification of LMS, obtained by applying a median operation to the raw gradient estimates of the mean squared error performance surface. An analysis of the MLMS algorithm is provided for the class of independent and identically distributed inputs. For these inputs we establish exponential convergence of the MLMS algorithm. The rate of convergence is shown to depend on order statistics of the input, but unlike that for LMS shows little dependence on characteristics of the impulsive interference. The steady state performance of the LMS and MLMS is also examined. The average deviation of the parameter estimates from their optimal values caused by the arrival of an impulse is assessed. This analysis indicates a significantly improved performance for MLMS compared to LMS. Analytic predictions for both convergence and steady state behavior are supported by simulations.

关键词： Least squares approximation Adaptive filters Convergence Steady-state Degradation Protection algorithm design and analysis Statistical distributions Interference Performance analysis

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Efficient optimization of all-terminal reliable networks, using an evolutionary approach (vol 46, pg 18, 1997)

引用

IEEE TRANSACTIONS ON RELIABILITY 1997年第3期46卷 341-341页

作者： Dengiz, B Altiparmak, F Smith, AE Gazi University Ankara Turkey University of Pittsburgh Pittsburgh USA

Presents a heuristic search algorithm inspired by evolutionary methods to solve the all-terminal network design problem when considering cost and reliability. Network topology; Failure of links as mutually independent... 详细信息

关键词： Network topology Computer network reliability Telecommunication network reliability Costs Computer networks Communication networks Hardware Communication system software Heuristic algorithms algorithm design and analysis

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Logical time: Capturing causality in distributed systems

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COMPUTER 1996年第2期29卷 49-&页

作者： Raynal, M Singhal, M OHIO STATE UNIV DEPT COMP & INFORMAT SCICOLUMBUSOH 43210 UNIV RENNES RENNESFRANCE

A distributed computation consists of a set of processes chat cooperate and compete to achieve a common goal. These processes do not share a common global memory and communicately solely by passing messages communication network. The communication delay is finite but unpredictable. A process's actions are modeled as three types of events: internal, message send, and message receive. An internal event affects only the process at which it occurs, and the events at a process are linearly ordered by their order of occurrence. Send and receive events signify the flow of information between processes and establish causal dependency from the sender process to the receiver process. Consequently, the execution of a distributed application results in a set of distributed events produced by the process. The causal precedence relation induces a partial order on the events of a distributed computation. Causality among events, more formally the causal precedence relation, is a powerful concept for reasoning, analyzing, and drawing inferences about a distributed computation. Knowledge of the causal precedence relation between processes helps programmers, designers, and the system itself solve a variety of problems in distributed computing. The notion of time is basic to capturing the causality between events. Distributed systems have no built-in physical time and can only approximate it. However, in a distributed computation, both the progress and the interaction between processes occur in spurts. Consequently, logical clocks can be used to accurately capture the causality relation between events. This article presents a general framework of a system of logical clocks in distributed systems and discusses three methods-scalar, vector, and matrix-for implementing logical time in these systems.

关键词： Distributed computing Clocks Communication networks Delay Inference algorithms algorithm design and analysis System recovery Synchronization Programming profession Process design

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