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检索条件"主题词=Signal processing algorithms"

共 43524 条记录，以下是81-90 订阅

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Accelerating signal processing algorithms in digital holography using an FPGA platform

Accelerating signal processing algorithms in digital hologra...

引用

IEEE International Conference on Field-Programmable Technology (FPT)

作者： T. Lenart V. Owall M. Gustafsson M. Sebesta P. Egelberg CCCD Department of Electroscience Lund University Lund Sweden

This paper describes the implementation of a custom DSP system to accelerate image processing algorithms used in the field of digital holography. The system, implemented on an FPGA platform, is intended for real-time reconstruction of images captured on a large image sensor. Due to the large amount of processing information, it is not possible to perform a HDL simulation of a complete image reconstruction in reasonable time. Instead, a reconfigurable solution is being used for full scale image reconstruction, exhaustive testing of the functionality and for connecting the accelerator to external components, i.e. the image sensor, monitor output device and high-speed memory banks.

关键词： Acceleration signal processing algorithms Holography Field programmable gate arrays Image reconstruction Image sensors Digital signal processing Image processing Real time systems Hardware design languages

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New digital signal processing algorithms for frequency deviation measurement

New digital signal processing algorithms for frequency devia...

引用

IEEE PES Transmission and Distribution Conference and Exposition

作者： M. Kezunovic P. Spasojevic B. Perunicic Department of Electrical Engineering Texas A and M University College Station TX USA Elektrotehnički Fakultet Sarajevo Bosnia and Herzegovina

Two digital signal processing algorithms for frequency deviation measurement are introduced. The algorithms are derived using a new signal processing scheme based on quadratic forms of signal samples. These algorithms provide high measurement accuracy over a wide range of frequency changes. One is designed for measurements of small deviations of the nominal frequency, whereas the other one measures off-nominal frequency deviations. The performance of the algorithms is evaluated using computer simulation tests.< >

关键词： Digital signal processing signal processing algorithms Frequency measurement Testing Frequency estimation Noise robustness Algorithm design and analysis EMTP Performance evaluation Power system transients

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Design space exploration and synthesis for digital signal processing algorithms from Simulink models

Design space exploration and synthesis for digital signal pr...

引用

International Design and Test Workshop

作者： Shahzad Ahmad Butt Luciano Lavagno Department of Electronics and Telecommunications Politecnico di Torino Torino Italy

Design teams are increasingly looking for design flows that can rapidly lead to high performance and low power implementation of DSP algorithms. Model-based design can satisfy this requirement, but it must be (1) coupled with efficient high-level synthesis support in order to provide good Quality of Results, and (2) controlled to derive the desired area/performance/throughput trade-off. We present a semi-automatic design flow for rapid high level synthesis-based hardware design space exploration starting from Simulink digital signal processing models. We illustrate our flow with a realistically complex signal processing algorithm for estimating the direction of arrival of a sound source. We show how one can start from a functionally validated fixed point model in Simulink and then go through a relatively simple design flow for hardware synthesis and automatic design space exploration, obtaining a very efficient hardware implementation that is competitive with the RTL implementation generated by another commercial model-based design tool.

关键词： Software packages Hardware Algorithm design and analysis Space exploration signal processing algorithms High level synthesis Throughput

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Multi-stage adaptive signal processing algorithms

Multi-stage adaptive signal processing algorithms

引用

Sensor Array and Multichannel signal processing Workshop

作者： S.S. Kozat A.C. Singer University of Illinois Urbana-Champaign Urbana-Champaign IL USA

In this paper, we explore the use of multi-stage adaptation algorithms for a variety of adaptive filtering applications where the structure of the underlying process to be estimated is unknown. These algorithms are "multi-stage" in that they comprise multiple adaptive filtering algorithms that operate in parallel on the observation sequence, and adaptively combine the outputs of this first stage to form an overall signal estimate. Several examples of this class of algorithms are demonstrated and analyzed in both a deterministic and stochastic context with respect to their convergence and mean squared error. The first example of this class, a "universal" linear predictor, was recently introduced and shown to asymptotically achieve the performance of the best linear predictor for each sequence, (up to some maximal order). Two new algorithms have been developed that generalize this universal linear predictor, and explore the use of the LMS algorithm in each stage of adaptation. Each of these algorithms are compared through theoretical analysis of their behavior.

关键词： Adaptive signal processing signal processing algorithms Machine learning algorithms Resonance light scattering Adaptive filters Convergence Least squares approximation Filtering algorithms Algorithm design and analysis Data compression

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Parallel Approaches to Digital signal processing algorithms with Applications in Medical Imaging

Parallel Approaches to Digital Signal Processing Algorithms ...

引用

International Conference on signal processing and Communication Systems, ICSPCS

作者： Konstantin Kapinchev Adrian Bradu Adrian Podoleanu School of Computing School of Physical Sciences University of Kent Canterbury England Applied Optics Group School of Physical Sciences University of Kent Canterbury England

ISBN: (数字)9781728121949

ISBN: (纸本)9781728121956

This paper reviews established and emerging parallel technologies, which are employed to enhance the performance of digital signal processing algorithms. Special attention is paid to algorithms with applications in medical imaging. Parallel implementations of some of the most commonly used algorithms, such as Fourier transforms, convolution and cross-correlation are discussed. Parallel optimization of a newly introduced method in optical coherence tomography is presented. Its performance, in terms of latency, is presented and discussed.

关键词： Message systems Instruction sets Convolution Biomedical imaging Graphics processing units signal processing algorithms Fourier transforms

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Polynomial spline signal processing algorithms

Polynomial spline signal processing algorithms

引用

International Conference on Acoustics, Speech, and signal processing (ICASSP)

作者： M. Unser A. Aldroubi National Institutes of Health DHHS Bethesda MD USA

The authors describe a novel digital filtering algorithms for the processing and representation of signals using polynomial splines. The classical polynomial spline interpolation problem is considered. It is found that it can be solved efficiently by recursive digital filtering. This result also yields a simple procedure for signal differentiation. Filters that efficiently solve the problem of smoothing spline approximations are derived. This technique is a regularized version of spline interpolation and is therefore less sensitive to noise. It is applied to the design of a robust edge detection algorithm with an adjustable scale parameter. A filtering/sampling algorithm for least squares spline approximation is described. This data reduction technique is applied to the generation of a cubic spline image pyramid that is found to compare favorably with the Gauss/Laplace pyramid.< >

关键词： Polynomials Spline signal processing algorithms Least squares approximation Filtering algorithms Interpolation signal processing Digital filters Smoothing methods Algorithm design and analysis

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Optimal automatic hardware synthesis for signal processing algorithms

Optimal automatic hardware synthesis for signal processing a...

引用

International Conference on Digital signal processing (DSP)

作者： N. Koziris G. Economakos T. Andronikos G. Papakonstantinou P. Tsanakas Department of Electrical and Computer Engineering Computer Science Division National and Technical University of Athens Zografou Greece

This paper presents a complete methodology for the automatic synthesis of VLSI architectures used in digital signal processing. Most signal processing algorithms have the form of an n-dimensional nested loop with unit uniform loop carried dependencies. We model such algorithms with generalized UET grids. We calculate the optimal makespan for the generalized UET grids and then we establish the minimum number of systolic cells required for achieving the optimal makespan. We present a complete methodology for the hardware synthesis of the resulting architecture, based on VHDL. This methodology automatically detects all necessary computation and communication elements and produces optimal layouts. The complexity of our proposed scheduling policy is completely independent of the size of the nested loop and depends only on its dimension, thus being the most efficient (in terms of complexity) known to us. All these methods were implemented and incorporated in an integrated software package which provides the designer with a powerful parallel design environment, from high level signal processing algorithmic specifications to low-level (i.e., actual layouts) optimal implementation. The evaluation was performed using well-known algorithms from signal processing.

关键词： Hardware signal synthesis signal processing signal processing algorithms signal design Algorithm design and analysis Very large scale integration Digital signal processing Computer architecture Processor scheduling

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Field programmable gate array design for an application specific signal processing algorithms

Field programmable gate array design for an application spec...

引用

IEEE International Caracas Conference on Devices, Circuits and Systems

作者： W.A. Moreno K. Poladia Center for Microelectronics Research University of South Florida Tampa FL USA

Field Programmable Gate Array (FPGA) architectures have emerged as an alternative means of implementing complex logic circuits providing rapid manufacturing turnaround time and low prototyping costs. This paper presents a new FPGA architecture suitable for the application specific signal processing algorithms and Wafer-Scale integration (WSI) Technology. The architecture must be designed for versatility, flexibility, high speed, improved logic density, and defect tolerance. The proposed FPGA architecture consists of 2 dimensional array of programmable logic elements based on look-up table, interconnection resources, and input/output (I/O) blocks. The architectural style is similar to the one used in XILINX FPGA architecture. A key variation from the commonly used FPGA is the dual switching scheme employed in the proposed architecture. The design methodology, the design tools, and results obtained by using a Segmented Channel Routing algorithm to map on it a 16 bit parallel multiplier, are presented.

关键词： Field programmable gate arrays Programmable logic arrays signal processing algorithms Design methodology Logic circuits Manufacturing Prototypes Costs Wafer scale integration Logic design

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Development of signal processing algorithms via functional programming

Development of signal processing algorithms via functional p...

引用

International Conference on Acoustics, Speech, and signal processing (ICASSP)

作者： M. Morf P. Ang J.-M. Delosme Information Systems Laboratory Electrical Engineering Department University of Stanford Stanford CA USA

Motivated by recent advances made in VLSI and VLSI-based systems, we describe the functional programming(FP) style as proposed by Backus [1]. Comparative studies are made by coding simple algorithms in a conventional language and in FP. We find that the methodologies involved in the two approaches are different; conventional languages require thinking at an object level while FP styles favour a more hierarchical formalization. The paper also discusses some limitations of FP styles that will have to be remedied.

关键词： signal processing algorithms Functional programming Computer architecture signal processing Information systems Laboratories Very large scale integration Arithmetic Parallel machines Bidirectional control

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Simulation models of TBM's echo and its signal processing algorithms

Simulation models of TBM's echo and its signal processing al...

引用

International Conference on Microwaves, Radar and Wireless Communications

作者： T. Brenner J. Goca W. Komorniczak Cz. Lesnik A. Modrzewski J. Pietrasinski Faculty of Electronics Institute of Radar Teclmology Military University of Technology Warsaw Poland

Difficulties concerning the detection of TBMs result from their radial speed, which is higher than a fighter's, and radar cross section (RCS) value, which is lower than a fighter's, so that fluctuations are very complicated. signal processing algorithms relating radar echoes from TBMs in radar with stacked receiving beams are described. Moreover, a simulation model of such echoes is considered. On the basis of these models, introductory research results are presented (see Brenner, T. et al., ibid., p.773-7).

关键词： signal processing algorithms Radar detection Statistics Radar cross section Azimuth Fluctuations Radar signal processing Radar antennas Change detection algorithms Trajectory

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