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检索条件"任意字段=Advanced Signal Processing Algorithms, Architectures, and Implementations 1990"

共 432 条记录，以下是61-70 订阅

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ERROR PROPAGATION OF SOME FAST RLS algorithms 4

ERROR PROPAGATION OF SOME FAST RLS ALGORITHMS

引用

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

作者： QIAO, SZ McMaster Univ. (Canada)

ISBN: (纸本)0819412767

The fast recursive least squares (RLS) algorithms have wide applications in signal processing and control. They are computationally efficient. Thus their stability is of major concern. In this paper, we investigate the error propagation and stability of some typical fast RLS algorithms. Through a random example, we show that a typical conventional fast RLS algorithm is weakly unstable in computing both the residuals and the gain vectors and a QR based algorithm is expected to be weakly stable in computing the residuals but weakly unstable in computing the gain vectors. We propose an error correction scheme for computing the gain vectors.

关键词： Algorithm development Condition numbers MATLAB Lead Process control signal processing Analytical research

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ALGORITHMIC ENGINEERING - A SIMPLIFIED DERIVATION OF THE ORTHOGONAL LEAST-SQUARES LATTICE

ALGORITHMIC ENGINEERING - A SIMPLIFIED DERIVATION OF THE ORT...

引用

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

作者： PROUDLER, IK MCWHIRTER, JG Royal Signals and Radar Establishment (United Kingdom)

ISBN: (纸本)081940943X

Algorithmic engineering provides a rigorous framework for describing and manipulating the type of building blocks commonly used to define parallel algorithms and architectures for digital signal processing. So far, the concept has only been illustrated by means of some relatively simple examples. These relate to the use of QR decomposition by Givens rotations for the purposes of adaptive filtering and beamforming. In this paper we present a much more challenging example whereby the techniques of algorithmic engineering are used to derive the QRD-based lattice algorithm for multi-channel least squares linear prediction. The elegant simplicity of this derivation, which comprises a sequence of straightforward diagrammatic manipulations, serves to demonstrate the potential power of algorithmic engineering as a formal design technique.

关键词： signal processing Neptunium Algorithm development Array processing Digital signal processing Linear filtering Digital filtering Computer architecture Parallel processing Parallel computing

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INSTANTANEOUS FREQUENCY AND KERNEL REQUIREMENTS FOR DISCRETE TIME-FREQUENCY DISTRIBUTIONS

INSTANTANEOUS FREQUENCY AND KERNEL REQUIREMENTS FOR DISCRETE...

引用

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

作者： JEONG, JH CUNNINGHAM, GS WILLIAMS, WJ Univ. of Michigan (United States)

ISBN: (纸本)0819404098

In this paper we introduce a new definition for the instantaneous frequency of a discrete-time analytic signal. Unlike the existing definition which uses only two data samples around a particular time this method utilizes all the data samples for estimating the instantaneous frequency. We prove that this quantity is identical to the average frequency evaluated at the particular time in the discrete-time TFD. This property is consistent with the analogous continuous-time property. We also derive requirements on the discrete-time kernel needed to satisfy this property. Using computer-generated signals and real data performance comparisons are made between the proposed approach and the existing one.

关键词： Time-frequency analysis Data analysis signal analyzers Statistical analysis

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NETWORKS FOR MODELING AND signal-processing

NETWORKS FOR MODELING AND SIGNAL-PROCESSING

引用

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

作者： YOU, YL XU, WY GORYN, D KAVEH, M Univ. of Minnesota (United States) Siemens AG (Germany)

ISBN: (纸本)081940943X

This paper presents modifications of the continuous Hopfield and Hartline-Ratliff networks for use in signal restoration and parameter estimation. The particular parameter estimation problem of interest is concerned with the estimation of the directions of arrival of an unknown number of plane waves in unknown noise. Restoration of linearly distorted noisy images is considered as an example of regularized restoration of a signal with known dynamic range.

关键词： Neurons signal to noise ratio Neural networks Image restoration signal processing Sensors Binary data Computer programming Control systems Phased arrays

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FPOP: Field Programmable On-line oPerators

FPOP: Field Programmable On-line oPerators

引用

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

作者： Tisserand, A Marchal, P Piguet, C CSEM Neuchatel Switzerland

ISBN: (纸本)0819432938

This paper describes a new digital reprogrammable architecture called Field Programmable On-line oPerators (FPOP). This architecture is a kind of FPGA dedicated to very low-power implementations of numerical algorithms in signal processing or digital control applications for embedded or portable systems. FPOP is based on a reprogrammable array of on-line arithmetic operators. On-line arithmetic is a digit-serial arithmetic with most significant digits first using a redundant number system. Because of the small size of the digit-serial operators and the small number of communication wires between the operators, single chip implementation of complex numerical algorithms can be achieved using on-line arithmetic. Furthermore, the digit-level pipeline and the small size of the arithmetic operators lead to high-performance parallel computations. Compared to a standard FPGA, the basic cells in FPOP are arithmetic operators such as adders, subtracters, multipliers, dividers, square-rooters, sine or cosine operators. This granularity level allows very efficient power x delay implementations of most algorithms used in digital control and signal processing. The circuit also integrates some analog to digital and digital to analog converters.

关键词： FPGA reconfigurable logic on-line arithmetic digital control signal processing

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Neural model-based motion estimation

Neural model-based motion estimation

引用

Conference on advanced signal processing - algorithms, architectures, and implementations VII

作者： Szostakowski, J Skoneczny, S Iwanowski, M Warsaw Univ. of Technology (Poland)

ISBN: (纸本)0819425842

In this paper a novel method of estimating displacement of moving objects from one frame to the next in the image sequence is presented. This method is based on using the artificial neural networks for different models of motion. The two model is examined: affine flow and planar surface motion. Various circuit architectures of simple neuron-like processors are considered for estimation of motion parameters. The efficiency of the proposed networks are investigated by computer simulation for using in video processing.

关键词： image processing neural networks video processing motion estimation

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Time-frequency analysis of a motor-generator 6

Time-frequency analysis of a motor-generator

引用

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

作者： Rohrbaugh, R USN CTR SURFACE WARFAREADV SIGNAL PROC BRANCHBREMERTONWA 98314

Time-frequency methods are applied for bearing analysis of a motor-generator. We show that these methods reveal features that are not seen by traditional methods, such as the power spectrum. These features may be used... 详细信息

ISBN: (纸本)0819422347

关键词： Time-frequency analysis Modulation Amplitude modulation Manufacturing Analytical research Corrosion Data modeling Quantum wells signal processing Warfare

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IMPLEMENTATION OF ADAPTIVE BEAMFORMING algorithms ON PARALLEL processing DSP NETWORKS

IMPLEMENTATION OF ADAPTIVE BEAMFORMING ALGORITHMS ON PARALLE...

引用

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

作者： BANERJEE, S CHAU, PM Univ. of California/San Diego (United States)

ISBN: (纸本)081940943X

In this paper we address the problem of implementing a Least Squares problem, like that arising in the adaptive beamforming case, on a multiprocessor network comprising of general purpose DSP processors. Although optimal array processors have been proposed for this problem, an implementation on a generalized network is a flexible and more modular and reconfigurable solution, suited for a highly dynamic environment with changing applications and problem sizes. The parallelization issues have been explored and a scheme for an efficient implementation has been described.

关键词： Digital signal processing Data communications Array processing Telecommunications Matrices Chromium Data processing Parallel processing Phased arrays Sensors

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HIGHLY PIPELINED VLSI ARCHITECTURE FOR COMPUTATION OF FAST FOURIER-TRANSFORMS 4

HIGHLY PIPELINED VLSI ARCHITECTURE FOR COMPUTATION OF FAST F...

引用

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

作者： YEH, HJ Ecole Normale Superieure de Lyon (South Korea)

ISBN: (纸本)0819412767

An on-chip VLSI architecture for computation of Fourier transforms is presented. It performs the arithmetic operations in a digit-level pipeline fashion. For this purpose, the implementation of arithmetic operators is based on on-line (i.e., digit-serial and most significant digit first) arithmetic, and the transforms are performed by a parallel-pipeline version of the Cooley- Tukey fast Fourier transform (FFT) algorithm.

关键词： Fourier transforms Very large scale integration Transform theory Binary data Computer architecture Computing systems Matrices Network architectures Digital signal processing signal processing

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WIGNER HIGHER-ORDER MOMENT SPECTRA - A REVIEW

WIGNER HIGHER-ORDER MOMENT SPECTRA - A REVIEW

引用

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

作者： FONOLLOSA, JR NIKIAS, CL Univ. of Southern California (United States)

ISBN: (纸本)081940943X

A general overview of the definition and properties of the recently defined Wigner higher order moment spectra (WHOS) is given in this paper. It is shown how the properties satisfied by WHOS are the extension of the well known properties of the Wigner-Ville distribution to a higher-order domain. In addition, a general class formulation, the discrete implementation, a comparison with a cumulant-based definition, the reduced interference condition, and tone application also are discussed.

关键词： Time-frequency analysis Fourier transforms signal analyzers Interference (communication) signal detection signal to noise ratio signal attenuation Multidimensional signal processing Image processing signal processing

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