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Binary openings and closings in one pass using finite-state machines 6

Binary openings and closings in one pass using finite-state ...

引用

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

作者： Waltz, FM Consultant (United States)

ISBN: (纸本)0819422347

In a series of ten papers published since 1994, a radically new technique for implementing a wide range of standard image processing operations has been presented, under the acronym SKIPSM (Separated-Kernel Image processing using finite State Machines). Key steps are: (1) the operation is separated into a row operation followed by a column operation, (2) these row and column operations are put in recursive form. That is, in a form compatible with either one-step software implementation or pipelined raster-scan hardware implementation, (3) the resulting operations are realized as FSMs (finite-state machines), and (4) these FSMs are implemented in software or in inexpensive off-the-shelf integrated circuits. Note that this technique does not require separability, in the usual sense. In this paper, the SKIPSM technique is applied to computing binary openings and closings in one pass using arbitrary binary structuring elements. Whether the resulting finite state machines are implemented in software or hardware, the result is generally much faster and/or much cheaper than conventional implementations. Furthermore, this same SKIPSM architecture is highly versatile and programmable, allowing it to be software-reconfigured to perform hundreds of other software- based or pipelined image processing operations, such a binary and grey-level morphology, the Grassfire Transform, binary and grey-level template matching, binary skeletonization, etc.

关键词： fast implementations image processing finite-state machines separability pipelining real-time inspection

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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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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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signal processing algorithms by permutation test in radar application 6

Signal processing algorithms by permutation test in radar ap...

引用

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

作者： AlvarezVaquero, F SanzGonzalez, JL UNIV POLITECN MADRID ETSI TELECOMUNDEPT SIGNAL SYST & RADIOCOMMUNE-28040 MADRIDSPAIN

ISBN: (纸本)0819422347

A hypothesis H is parametric if every distribution from the process defined by H belongs to a family of distributions characterized by a finite number of parameters; on the other hand, if the distribution can not be defined by a finite number of parameters, the hypothesis is nonparametric. In this paper, we analyze a detector based on the optimum permutation test, applied to nonparametric radar detection which provide good performances without a large computational work, and we compare it with the parametric test and rank test in the Neyman-Pearson sense. The computational complexity of the detector is high and its implementation in real time is difficult, due to the number of operations increase with the factorial of the number of samples. Also, we present an algorithm that reduces the computational work required. We also present the detectability characteristic of the optimum permutation test against rank test and parametric test under Gaussian noise environments and different types of target models (nonfluctuating, Swerling I and Swerling II). The detection probability versus signal-to-noise ratio is estimated by Monte-Carlo simulations for different parameter values (N pulse, M reference samples and false alarm probability P_fa).

关键词： nonparametric permutation test rank test radar detection detectability target models

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Design and evaluation of automated checks for signal processing applications 6

Design and evaluation of automated checks for signal process...

引用

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

作者： Nair, VSS Kim, HC Krishnamurthy, N Abraham, JA SO METHODIST UNIV DEPT COMP SCI & ENGNDALLASTX 75275

ISBN: (纸本)0819422347

Most of the signal processing application programs involve computationally intensive iterative steps. In such programs, various failures in the underlying hardware manifest as control-flow errors that affect the reliability of the computed results. Various techniques have been proposed in the past to detect and recover from such control-flow errors. Unfortunately, all these techniques need either additional hardware or modification of the hardware and are not portable across various platforms. To circumvent these limitations, recently we have developed a high-level control-flow checking approach using assertions (CCA). In CCA, branch-free intervals in a given high-level language program are identified and the entry and exit points of the intervals are fortified through pre-inserted assertions. In this paper we describe an implementation of CCA through a pre-processor that will automatically insert the necessary assertions into a high-level language program. Based on the implementation we study the fault detection capabilities of CCA with the help of fault injection experiments using FERRARI.

关键词： Simulation of CCA and DLA aggregates Switches signal processing Reliability Computing systems Computer engineering Data modeling Error analysis Error control coding Computer science

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Time sequenced adaptive filtering using a modified P-vector algorithm 6

Time sequenced adaptive filtering using a modified P-vector ...

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

作者： Williams, R USAF WRIGHT LABAUTOMAT TARGET RECOGNIT DEV BRANCHWRIGHT PATTERSON AFBOH 45433

ISBN: (纸本)0819422347

An adaptive algorithm and two stage filter structure were developed for adaptive filtering of certain classes of signals that exhibit cyclostationary characteristics. The new modified P-vector algorithm (mPa) eliminates the need for a separate desired signal which is typically required by conventional adaptive algorithms. It is then implemented in a time-sequenced manner to counteract the nonstationary characteristics typically found in certain radar and bioelectromagnetic signals. Initial algorithm testing is performed on evoked responses generated by the visual cortex of the human brain with the objective, ultimately, to transition the results to radar signals. Each sample of the evoked response is modeled as the sum of three uncorrelated signal components, a time-varying mean (M), a noise component (N), and a random jitter component (Q). A two stage single channel time-sequenced adaptive filter structure was developed which improves convergence characteristics by de coupling the time-varying mean component from the `Q' and noise components in the first stage. The EEG statistics must be known a priori and are adaptively estimated from the pre stimulus data. The performance of the two stage mPa time-sequenced adaptive filter approaches the performance for the ideal case of an adaptive filter having a noiseless desired response.

关键词： time sequenced adaptive filter EEG biomedical signal processing radar 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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Linear invariant systems

Linear invariant systems

引用

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

作者： Cohen, Leon CUNY New York NY 10021 USA

ISBN: (纸本)9780819468451

We formulate in a simple fashion the concept of invariance for a linear system. We show that one must define what we call an "associated Hermitian operator"' which commutes with the system function. We show that it is this Hermitian operator that defines the invariance and also determines the appropriate transform and other connections between input and output relations.

关键词： signal processing

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Time-frequency characterization of acoustic transients

Time-frequency characterization of acoustic transients

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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 ...

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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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