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

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A parallel DSP testbed with a heterogeneous and reconfigurable network fabric

A parallel DSP testbed with a heterogeneous and reconfigurab...

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IEEE International Conference on Innovative Systems in Silicon

作者： S.K. Tewksbury K. Devabattini v. Gandikota Laboratory for Advanced Information and Computation Systems Department of Electrical and Computer Engineering West Virginia University Morgantown WV USA

A testbed for investigation of heterogeneous and reconfigurable data network fabrics supporting a parallel DSP computational accelerator is described. The DSP processors are large-grained processors (Analog Devices SHARC DSPs), with a variety of parallel DSP array architectures possible. The network fabric is intended to be reconfigurable (within a rich but necessarily limited set of structures) to adapt to the needs of a sequence of image processing algorithms being executed (e.g., in a medical image processing environment). The testbed will exploit conventional FPGA components to provide reconfigurable network structures and will exploit commercial high-speed interconnect components emerging for applications such as board-to-board applications. As a computational accelerator, the testbed is intended to be controlled by a host processor, with the host processor cooperating in the definition of the changes in the structure of the network structure as execution of a sequence of image processing algorithms proceeds.

关键词： Digital signal processing Testing Fabrics Computer networks Life estimation Image processing Concurrent computing Computer architecture Biomedical image processing Field programmable gate arrays

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advanced signal processing algorithms, architectures, and implementations vI

Advanced Signal Processing Algorithms, Architectures, and Im...

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advanced signal processing algorithms, architectures, and implementations vI 1996

The proceedings contain 41 papers. The topics discussed include: vLSI digital signal processing: some arithmetic issues;near canonic double-based number system (DBNS) with applications in digital signal processing;novel high-speed bit-parallel multiply accumulate arithmetic architecture;low-power radix 2 division algorithm with minimum add/sub operations;DSP implementation of source location using microphone arrays;one-sided algorithm for subspace projection beam-forming;modern microphone array for hearing aid and speech processing;signal processing algorithms by permutation test in radar application;and time-sequenced adaptive filtering using a modified P-vector algorithm.

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advanced signal processing: algorithms, architectures, and implementations v

Advanced Signal Processing: Algorithms, Architectures, and I...

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advanced signal processing: algorithms, architectures, and implementations v

The topics discussed are cumulants;time frequency signal analysis;mobile communications;nonlinear dynamics and signal processing;subspace tracking;array processing;fast solvers for structured systems;regularization me... 详细信息

ISBN: (纸本)0819416207

关键词： signal processing

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A high speed CORDIC algorithm 6

A high speed CORDIC algorithm

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

作者： ElGuibaly, F Sabaa, A UNIV VICTORIA DEPT ELECT ENGNVICTORIABC V8W 3P6CANADA

ISBN: (纸本)0819422347

In this paper, we introduce modifications on the classic CORDIC algorithm to reduce the number of iterations, and hence the rounding noise. The modified algorithm needs, at most, half the number of iterations to achieve the same accuracy as the classical one. The modifications are applicable to linear, circular and hyperbolic CORDIC in both vectoring and rotation modes. Simulations illustrate the effect of the new modifications. © 1996 SPIE. All rights reserved.

关键词： Optical engineering

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An embedded-processor architecture for parallel DSP algorithms 6

An embedded-processor architecture for parallel DSP algorith...

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

作者： Hobson, RF Wong, PS Evenson, SA SIMON FRASER UNIV SCH COMP SCIBURNABYBC V5A 1S6CANADA

ISBN: (纸本)0819422347

A methodology for constructing parallel embedded DSP systems is described. The method uses a software and embedded processor abstraction to help raise the level of problem analysis above the raw state machine concept. Custom architectures are constructed by using multiple copies of a core embedded processor linked together with FIFO memories or other communication structures, and augmented with appropriate high speed data manipulation IO devices. Some field programmability and customization is possible through the use of SRAM program memories. © 1996 SPIE. All rights reserved.

关键词： parallel embedded systems custom DSP ATM User-Network Interfaces

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Time-frequency analysis of a motor-generator 6

Time-frequency analysis of a motor-generator

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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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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...

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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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vLSI Digital signal processing: Some arithmetic issues 6

VLSI Digital Signal Processing: Some arithmetic issues

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

作者： Jullien, GA UNIV WINDSOR VLSI RES GRP WINDSOR ON N9B 3P4 CANADA

ISBN: (纸本)0819422347

In this review paper we discuss selected issues associated with the implementation of arithmetic for vLSI Digital signal Processors. We start with a Silicon Technology Roadmap view of the next decade, in order to grasp some of the issues facing the next generation of vLSI designers, particularly associated with high performance DSP systems. We use this roadmap to open the discussion on the role basic arithmetic operations play in the construction of DSP systems; in particular we look at the interplay between algorithms, architecture, arithmetic representation and circuit implementation. Many of the illustrative examples are taken from work conducted in the vLSI Research Group, University of Windsor over the past few years, including on- going work.

关键词： vLSI Digital signal processing computer arithmetic number systems pipelined circuits

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Arrays of randomly spaced sensors 6

Arrays of randomly spaced sensors

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

作者： Lorenzelli, F Yao, K UNIV CALIF LOS ANGELES DEPT ELECT ENGNLOS ANGELESCA 90095

ISBN: (纸本)0819422347

This paper considers a class of blind beamforming problems in which the amount of prior information is very limited. The array sensors are placed in unknown locations within a geographical region, and have unknown frequency/spatial response. The sensors communicate synchronously with a main processor unit. The array is illuminated by a source, which may be narrow- or broadband, in near or far field. Additional disturbances may be present, in the form of interferers, possibly correlated or coherent with the main signal, and additive noise. The goal is required to steer beam toward the desired signal. Four schemes are presented, each based on the type of prior available information.

关键词： blind beamforming broadband array processing random array

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Application of higher-order cepstral techniques in problems of fetal heart signal extraction 6

Application of higher-order cepstral techniques in problems ...

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

作者： SabryRizk, M Zgallai, W Hardiman, P ORiordan, J CITY UNIV LONDON DEPT ELECT ENGNSIGNAL PROC GRPLONDON EC1V 0HBENGLAND

ISBN: (纸本)0819422347

Recently, cepstral analysis based on second order statistics and homomorphic filtering techniques have been used in the adaptive decomposition of overlapping, or otherwise, and noise contaminated ECG complexes of mothers and fetals obtained by a transabdominal surface electrodes connected to a monitoring instrument, an interface card, and a PC. Differential time delays of fetal heart beats measured from a reference point located on the mother complex after transformation to cepstra domains are first obtained and this is followed by fetal heart rate variability computations. Homomorphic filtering in the complex cepstral domain and the subuent transformation to the time domain results in fetal complex recovery. However, three problems have been identified with second-order based cepstral techniques that needed rectification in this paper. These are (1) errors resulting from the phase unwrapping algorithms and leading to fetal complex perturbation, (2) the unavoidable conversion of noise statistics from Gaussianess to non-Gaussianess due to the highly non-linear nature of homomorphic transform does warrant stringent noise cancellation routines, (3) due to the aforementioned problems in (1) and (2), it is difficult to adaptively optimize windows to include all individual fetal complexes in the time domain based on amplitude thresholding routines in the complex cepstral domain (i.e. the task of `zooming' in on weak fetal complexes requires more processing time). The use of third-order based high resolution differential cepstrum technique results in recovery of the delay of the order of 120 milliseconds.

关键词： advanced signal processing techniques non-linear adaptive filtering differential bicepstral applications non-invasive fetal ECG monitoring

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