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168 篇 会议

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

共 168 条记录，以下是11-20 订阅

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The Wigner distribution and pulse propagation

The Wigner distribution and pulse propagation

引用

conference on advanced signal processing algorithms, architectures, and implementations XI

作者： Cohen, L CUNY New York NY 10021 USA

We use the Wigner distribution to study pulse propagation in a dispersive media and we show that it leads naturally to a particle view. Using the results obtained we develop a simple approximation method that evolves ... 详细信息

ISBN: (纸本)0819441880

关键词： signal processing

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The instantaneous frequency of a propagating pulse

The instantaneous frequency of a propagating pulse

引用

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

作者： Cohen, L City University of New York Hunter College New York NY 10021 695 Park Ave. United States

We calculate the instantaneous frequency at a fixed position of a propagating pulse in the asymptotic regime. We also discuss the multimode case and relate it to the concept of instantaneous bandwidth.

ISBN: (纸本)0819425842

关键词： signal detection

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Time-frequency characterization of acoustic transients

Time-frequency characterization of acoustic transients

引用

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

作者： Rohrbaugh, R Naval Surface Warfare Ctr. (United States)

ISBN: (纸本)0819425842

Impulsive transient signals have been difficult to characterize and classify using traditional signal processing methods. We show that time-frequency distributions can effectively characterize the transient response of an acoustical cavity. Class-dependent kernels developed from time-frequency distributions are used to successfully classify the impulsive transients.

关键词： Time-frequency analysis signal processing Acoustics Aluminum Glasses Fourier transforms Frequency modulation Interfaces Phase shift keying Wave propagation

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Reconfigurable hardware based digital signal processing for wireless communications

Reconfigurable hardware based digital signal processing for ...

引用

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

作者： Page, KJ Arrigo, JF Chau, PM Univ. of California/San Diego (United States)

ISBN: (纸本)0819425842

This paper presents, Index Mapping, a technique to efficiently map a widely used class of digital signal processing algorithms onto a space/time paradigm with immediate representation as the partitioning and scheduling map of a small, I/O efficient, hardware array. When applied to reconfigurable FPGA based hardware architectures with downstream Sea-of-Gates optimization methods, the resulting systems form a dynamic signal processing environment with the best mix of performance and flexibility for wireless applications. Herein, Index Mapping is demonstrated with a mapping of the Fast Fourier Transform (FFT) onto an FPGA computing machine, the ReConfigurable Processor (RCP).

关键词： shuffle linear permutation FFT index map folding

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Generalization of the autocorrelation function

Generalization of the autocorrelation function

引用

SPIE conference on advanced signal processing algorithms, architectures, and implementations VIII

作者： Cohen, L CUNY Hunter Coll New York NY 10021 USA

ISBN: (纸本)0819429163

We generalize the concept of the autocorrelation function to arbitrary physical variables and show how it can be used to define a local autocorrelation function. Using the local autocorrelation function we develop a new method to generate densities for arbitrary physical quantities. In addition, we show that the generalized autocorrelation function can be used to characterize functions with respect to a physical property.

关键词： Time-frequency analysis Fourier transforms Astatine signal processing

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Solution of differential equations using the smoothed Wigner distribution

Solution of differential equations using the smoothed Wigner...

引用

conference on advanced signal processing algorithms, architectures, and implementations XI

作者： Galleani, L Cohen, L Politecn Torino I-10129 Turin Italy

We present a method for writing the differential equation for the smoothed Wigner distribution that corresponds to the solution of an ordinary linear differential equation. The method can be applied on an, linear ordi... 详细信息

ISBN: (纸本)0819441880

关键词： Differential equations Ordinary differential equations Standards development Convolution Fourier transforms Smoothing Einsteinium Partial differential equations signal processing Time-frequency analysis

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Wave propagation with dispersion and damping

Wave propagation with dispersion and damping

引用

conference on advanced signal processing algorithms, architectures, and implementations XIV

作者： Cohen, L CUNY New York NY 10021 USA

ISBN: (纸本)0819454974

We discuss pulse propagation in a dispersive medium with damping. We derive an explicit expression for the center of mass motion and show that when there is damping the center of mass does not travel with constant velocity, as is the case when there is no damping. We also derive an explicit relation connecting pulse propagation in the damped case with that of the undamped case. This allows the transformation from one case to the other. A number of exactly solvable examples are given to illustrate the equations derived.

关键词： Wave propagation Dispersion Fourier transforms Differential equations signal attenuation signal processing

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Scale-cumulant domain deconvolution of sensor array signals

Scale-cumulant domain deconvolution of sensor array signals

引用

conference on advanced signal processing algorithms, architectures, and implementations X

作者： Izzetolu, M Akgül, T Drexel Univ Dept Elect & Comp Engn Philadelphia PA 19104 USA

ISBN: (纸本)0819437611

In this paper we combine two recently developed multi-scale deconvolution algorithms, known as the scale-time domain method and the sum-of-cumulants domain method. We formulate the deconvolution problem in the scale-cumulant domain using the Scale Transform (ST) and show that the procedure is simpler when the unknown source signal is non-minimum phase and robust if Gaussian noise exists.

关键词： Sensors Deconvolution Electronic filtering Interference (communication) Algorithm development Reflectors signal processing Convolution Detection theory Image 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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