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检索条件"任意字段=Advanced Signal Processing: Algorithms, Architectures, and Implementations V"

共 471 条记录，以下是71-80 订阅

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ERROR DETECTION IN DIGITAL NEURAL NETWORKS - AN ALGORITHM-BASED APPROACH FOR INNER PRODUCT PROTECTION

ERROR DETECTION IN DIGITAL NEURAL NETWORKS - AN ALGORITHM-BA...

引用

5th SPIE Conference on advanced signal processing - algorithms, architectures, and implementations

作者： BREvEGLIERI, L PIURI, v POLITECN MILAN DEPT ELECTR & INFORMATI-20133 MILANITALY

ISBN: (纸本)0819416207

Artificial Neural Networks are an interesting solution for several real-time applications in the area of signal and image processing, in particular since recent advances in vLSI integration technologies allow for efficient hardware realizations. The use of dedicated circuits implementing the neural networks in mission-critical applications requires a high level of protection with respect to errors due to faults to guarantee output credibility and system availability. In this paper, the problem of concurrent error detection in dedicated neural networks is discussed by adopting an algorithm-based approach to check the inner product, i.e., the most of the computation performed in the neural network. Effectiveness and efficiency of this technique is shown and evaluated for the widely-used classes of neural paradigms.

关键词： DIGITAL NEURAL NETWORKS CONCURRENT ERROR DETECTION ALGORITHM-BASED FAULT TOLERANCE

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RELATIONSHIPS BETWEEN THE FOURIER-TRANSFORM AND THE WAvELET TRANSFORM

RELATIONSHIPS BETWEEN THE FOURIER-TRANSFORM AND THE WAVELET ...

引用

CONF ON advanced signal-processing algorithms, architectures, AND implementations

作者： RESNIKOFF, HL BURRUS, CS Aware Inc. (United States) Aware Inc. and Rice Univ. (United States)

ISBN: (纸本)0819404098

This paper derives the relationship between the coefficients of the Fourier expansion of a periodic signal and the coefficients of the wavelet expansion of the same signal. The formula derived shows how the Fourier concept of frequency and the wavelet concept of scale are related and how the wavelet coefficients display the information contained in the signal in a new way. The relationship also shows how the wavelet expansion can be used to approximately calculate the Fourier coefficients.

关键词： Wavelets Fourier transforms Wavelet transforms Computing systems Digital signal processing Mathematical modeling signal processing Systems modeling Feature extraction Mathematics

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signal EXTRAPOLATION IN NOISY DATA WITH WAvELET REPRESENTATION 4

SIGNAL EXTRAPOLATION IN NOISY DATA WITH WAVELET REPRESENTATI...

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4TH CONF ON advanced signal processing algorithms, architectures, AND implementations

作者： LIN, LC KUO, CCJ Univ. of Southern California (United States)

ISBN: (纸本)0819412767

A new approach for signal extrapolation based on wavelet representation known as scale-time limited extrapolation and a denoising process is investigated in this research. We first examine a new signal modeling technique using wavelets and the corresponding scale-time limited signal extrapolation algorithm. Then, the sensitivity of the algorithm to noise is discussed, and a denoising algorithm based on the time-localization property of the wavelet transform is proposed. By integrating the denoising process and the iterative scale-time limited extrapolation algorithm, we obtain a very robust signal extrapolation algorithm for noisy data. A simulation result of signal extrapolation from noisy observed data is presented to illustrate the performance of the proposed robust signal extrapolation algorithm.

关键词： Wavelets Denoising Interference (communication) signal processing signal to noise ratio Algorithm development Evolutionary algorithms Image processing Reconstruction algorithms Wavelet transforms

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OvERvIEW OF SOME RECENT RESEARCH IN signal-processing FOR PERSONAL COMMUNICATION-NETWORKS

OVERVIEW OF SOME RECENT RESEARCH IN SIGNAL-PROCESSING FOR PE...

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CONF ON advanced signal processing algorithms, architectures, AND implementations 3

作者： MILSTEIN, LB Univ. of California/San Diego (United States)

ISBN: (纸本)081940943X

The use of wireless personal communication networks (PCN) to increase the capacity of cellular radio systems is a topic currently receiving much attention. In addition to the increase in capacity one achieves by going to a microcellular system, one can increase the spectral efficiency even further by allowing the PCN to overlay a frequency band which is already occupied with narrowband waveforms. various signal processing techniques can be used advantageously in this regard, and such techniques are outlined below.

关键词： signal processing Digital filtering Receivers Linear filtering Microwave radiation Telecommunications Transmitters Interference (communication) RF communications Wireless communications

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EFFICIENT BEAM-BASED ADAPTIvE processing FOR PLANAR ARRAYS

EFFICIENT BEAM-BASED ADAPTIVE PROCESSING FOR PLANAR ARRAYS

引用

CONF ON advanced signal-processing algorithms, architectures, AND implementations

作者： KRATZER, SG Supercomputing Research Ctr. (United States)

ISBN: (纸本)0819404098

Beam-based adaptive processing is an economical way to achieve good interference rejection performance from an adaptive receiving array, at much less computational cost than full element-based methods. However, to exploit this potential for planar arrays it is necessary to identify, in real time, which beams must be retained for adaptive concellation. This paper analyzes the beam-selection problem and presents a computationally efficient algorithm that performs real-time beam selection.

关键词： signal processing signal to noise ratio Statistical analysis Algorithm development Beam analyzers Electroluminescence Cobalt Electronics Fourier transforms Phased arrays

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A near canonic double-based number system (DBNS) with applications in digital signal processing 6

A near canonic double-based number system (DBNS) with applic...

引用

Conference on advanced signal processing algorithms, architectures, and implementations vI

作者： Dimitrov, v SadeghiEmamchaie, S Jullien, GA Miller, WC UNIV WINDSOR VLSIRES GRPWINDSORON N9B 3P4CANADA

ISBN: (纸本)0819422347

In this paper we explore a new number system which uses a double base. The representation of the numbers has a very simple geometric interpretation, allowing potentially fast implementation of the basic arithmetic operations. The transformation of the integers into minimal form, however, leads to some problems associated with transcendental number theory, and we identify and open the discussion on these problems. An intriguing implementation vehicle, which has some of the properties associated with symbolic substitution in optical computing, is the use of Cellular Neural Networks (CNNs) to perform digit reduction. Brief details are presented on CNN implementation, and a system-level example is shown in order to justify the applicability of the proposed theory in digital signal processing. © 1996 SPIE. All rights reserved.

关键词： number systems computer arithmetic number theory diophantine equations symbolic substitution Cellular Neural Networks digital filtering

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Phase-space approach to wave propagation with dispersion and damping

Phase-space approach to wave propagation with dispersion and...

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Conference on advanced signal processing algorithms, architectures, and implementations XIv

作者： Loughlin, P Cohen, L Univ Pittsburgh Pittsburgh PA 15261 USA

ISBN: (纸本)0819454974

We consider dispersive propagation with damping in phase-space, and derive the Wigner distribution in terms of the initial wave and the dispersion relation. The case for no damping. that is. lossless propagation, has been previously considered by Cohen, and is a special case of the more general result presented here. Simple and physically revealing approximations of the Wigner distribution in terms of the initial Wigner distribution are presented. Also. exact low-order conditional moments are given and their interpretation is discussed.

关键词： Wave propagation Dispersion Fourier transforms Time-frequency analysis Astatine signal attenuation Spatial frequencies Partial differential equations signal processing Waveguides

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SCHEDULING PARALLEL implementations OF PARTITIONED ORTHOGONAL TRANSFORMATIONS

SCHEDULING PARALLEL IMPLEMENTATIONS OF PARTITIONED ORTHOGONA...

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CONF ON advanced signal processing algorithms, architectures, AND implementations 3

作者： KUCHIBHOTLA, P RAO, BD Univ. of California/San Diego (United States)

ISBN: (纸本)081940943X

Orthogonal matrix transformations form an important part of matrix-based signal processing applications. Systolic arrays for computing these algorithms have been developed and the size of these arrays usually depends directly on the size of the problem. For large matrix sizes, implementing large numbers of processors in hardware is not physically feasible. In this paper, we examine two popular orthogonal transformations, Givens rotations and householder transformations (HT), from the viewpoint of realizing a fixed-size parallel processor array that can handle large data matrices. An efficient scheduling procedure is used to compute the HT on a systolic type array, its performance is compared with that of an array designed for computing the Givens method. An important conclusion resulting from the comparison is that the performance of the HT array is superior to that for the Givens method when the matrices are larger compared to the array size.

关键词： Silicon signal processing Algorithm development Matrices Parallel computing Array processing Data storage Electrochemical etching Filtering (signal processing) Lanthanum

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CONTRIBUTION OF THE POLARIZATION DIvERSITY IN HF DIRECTION FINDING SYSTEMS

CONTRIBUTION OF THE POLARIZATION DIVERSITY IN HF DIRECTION F...

引用

5th SPIE Conference on advanced signal processing - algorithms, architectures, and implementations

作者： ERHEL, Y EDJEOU, A BERTEL, L CTR RECH ECOLES COETQUIDAN F-56381 GUERFRANCE

ISBN: (纸本)0819416207

The aim of the paper is to estimate the contribution of the polarization diversity in high frequency (3 - 30 MHz) direction finding systems. We first describe the peculiarities of H.F. propagation and the resulting signal model involved in computer simulations. Next, we analyze the behavior of some particular direction finding systems using linear and circular geometries and polarization diversity. Some algorithms (non linear frequential analysis, M.U.S.I.C.) are tested in several conditions (narrowband or broadband signals, polarization filtering reiterated or no, sub-sampling). Theoretical and experimental results show that polarization diversity based upon the knowledge of the antenna complex responses improves greatly the efficiency of direction finding.

关键词： DIRECTION FINDING POLARIZATION ARRAY processing HIGH RESOLUTION algorithms HF PROPAGATION

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Crosstalk in QCA arithmetic circuits

Crosstalk in QCA arithmetic circuits

引用

Conference on advanced signal processing algorithms, architectures, and implementations XvI

作者： Karim, Faizal Walus, Konrad Ivanov, Andre Univ British Columbia Dept Elect & Comp Engn Vancouver BC V6T 1Z4 Canada

ISBN: (纸本)0819463922

Quantum-Dot Cellular Automata (QCA) is one of several proposed computational nanotechnology paradigms that are being investigated as alternatives to CMOS at the nano-scale. QCA has been reported to offer relatively low power consumption, and very high device density. In recent years, several researchers have started investigating relatively complex circuit architectures using QCA. Such design efforts have highlighted the crosstalk problem in QCA and the lack of research in this area. This paper explores the nature of crosstalk in QCA. We show how crosstalk can be amplified due to several parameters including wire length and the distance between adjacent cells. We develop a model and method that allows us to test for crosstalk using a set of test vectors. We also propose a set of cell placement guidelines and design geometries that help to minimize QCA crosstalk in large circuits.

关键词： crosstalk QCA arithmetic circuits

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