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Proceedings of the IEEE

Issue 3 • Date March 1988

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Displaying Results 1 - 19 of 19
  • Uncertainty in artificial intelligence [Book Review]

    Publication Year: 1988, Page(s): 301
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    Freely Available from IEEE
  • Lasers [Book Review]

    Publication Year: 1988, Page(s): 301
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    Freely Available from IEEE
  • Spread spectrum communications [Book Review]

    Publication Year: 1988, Page(s):301 - 302
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    Freely Available from IEEE
  • Comments, with reply, on `Future trends in wafer scale integration' by R.O. Carlson and C.A. Neugebauer

    Publication Year: 1988, Page(s):283 - 284
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (168 KB)

    The commenter argues that the authors of the above paper (see ibid., vol.74, no.12, p.1741-1752, 1986) prematurely dismissed memory as a WSI candidate. He raises the valid point that WSI memory is easier to implement than WSI logic. He proposes a wafer virtual memory as particularly suitable for WSI, using a look-up table to keep track of good and bad RAM cell locations, and thus routing the addre... View full abstract»

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  • An overview of the hybrid MM/Green's function method in electromagnetics

    Publication Year: 1988, Page(s):270 - 282
    Cited by:  Papers (36)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1056 KB)

    An overview is presented of a hybrid technique for solving electromagnetic radiation and scattering problems by combining the method of moments (MM) with a special Green's function. The method, referred to as an MM/Green's function solution, combines the ability of MM solutions to treat geometrically complex bodies with the accuracy and computational efficiency of Green's function solutions. Compa... View full abstract»

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  • On the joint statistics of amplitude and phase of a signal with co-channel interference

    Publication Year: 1988, Page(s):298 - 299
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB)

    The joint probability density function (pdf) of the resultant amplitude and phase of a signal in presence of cochannel interference is given. The marginal pdf of the amplitude variable is evaluated. This joint pdf can be used to evaluate the receiver performance in presence of interfering signals View full abstract»

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  • Note on contrast measures and polynomial classifiers

    Publication Year: 1988, Page(s):294 - 296
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    The application of a contrast measure for segmenting images and the relationship of this method to polynomial-based classification are considered. The relevance of the segmentation method is shown by applying the contrast measure to a semiconductor manufacturing inspection problem. The contrast measure is shown to be a particular case of a pixel classification technique based on polynomial decisio... View full abstract»

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  • Regular iterative algorithms and their implementation on processor arrays

    Publication Year: 1988, Page(s):259 - 269
    Cited by:  Papers (120)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (940 KB)

    Some recent results are summarized concerning a class of algorithms known as regular iterative algorithms, particularly with respect to their implementations on processor arrays. Regular iterative algorithms contain all algorithms executed by systolic arrays as a proper subclass and are therefore of considerable importance in real-time signal processing applications. Some general concepts concerni... View full abstract»

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  • Comments, with reply, on `Electric field of a transmission line over a multilayered media'

    Publication Year: 1988
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (96 KB)

    The commenter points out that the general solution for the electric field of a current line source of alternating current over a stratified earth of any number of layers published in the above letter (see ibid., vol.75, no.1, p.170-171, 1987) was obtained by him in a paper that he published 24 years ago. The authors acknowledge Wait's prior claim, observing that parallel research of this sort is t... View full abstract»

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  • Digital system for 1/f fluctuation-speed control of a small-fan motor

    Publication Year: 1988, Page(s):299 - 300
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (148 KB)

    To produce a comfortable breeze similar to a natural one, a digital open-loop control system was utilized to control the speed of a small fan motor with 1/f fluctuation. The system was modeled as a first-order lag element with a time constant of 1.1 s. The output was controlled by commands and produced 1/f fluctuations, even though it was an open-loop system when the holding time... View full abstract»

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  • A hybrid E-pulse/least squares technique for natural resonance extraction

    Publication Year: 1988, Page(s):296 - 298
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (244 KB)

    A technique to extract the resonant frequencies of a radar target is presented. The scheme is completely automated, with only the number of natural modes expected and the beginning of late-time as inputs. Results using experimental data demonstrate the insensitivity of the method to random noise and to estimates of model content. The technique is computationally efficient, taking only a few minute... View full abstract»

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  • Some practical remarks on the extended Prony's method of spectrum analysis

    Publication Year: 1988, Page(s):284 - 285
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB)

    Prony's method of spectrum analysis models a time series as a linear combination of complex exponentials plus a white noise. The performance of the method is very dependent on the peculiarity of the signal to be analyzed. Four algorithms for autoregressive estimation are experimentally compared to provide valid indications for the choice of the most suitable one for estimating the Prony's paramete... View full abstract»

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  • Computing local minima and maxima of digital images in pipeline image processing systems equipped with hardware comparators

    Publication Year: 1988, Page(s):286 - 287
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    An efficient technique is presented for computing minima (maxima) values of gray levels of pixels within rectangular windows. It is suitable for pipeline image processing systems having processors equipped with hardware comparators. The complexity of computing the minima and/or maxima of gray levels within M×N windows is determined View full abstract»

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  • Design of digital differentiators for low frequencies

    Publication Year: 1988, Page(s):287 - 289
    Cited by:  Papers (71)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    Optimal, maximally accurate digital differentiators (DDS) are derived for the low-frequency range. Exact coefficients used in the proposed DDs can be readily computed from explicit formulas, whereas the optimal (minimas RE) DDs require and optimization program to derive the coefficients. The lower the frequency of differentiation, the better is the performance of the proposed differentiators, maki... View full abstract»

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  • Order-recursive spectrum estimation

    Publication Year: 1988, Page(s):289 - 290
    Cited by:  Papers (7)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB)

    The use of a multiple-pole filter in the time-average estimation of the autocorrelation allows the power spectrum estimates to be recursive in the order of multiplicity of the filter pole. The recursive generation of the estimates from various filter orders provides the flexibility to select the estimator of interest in terms of the variance and spectral and temporal resolution View full abstract»

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  • Introducing a third-order Wigner distribution

    Publication Year: 1988, Page(s):290 - 292
    Cited by:  Papers (43)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    A third-order Wigner distribution called the Wigner bispectrum is presented. This mixed time-frequency-frequency representation extends the standard Wigner distribution in the same way that the bispectrum extends the power spectrum. The Wigner bispectrum preserves many of the essential features and appealing properties of the Wigner distribution View full abstract»

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  • Computing image texture features in parallel computers

    Publication Year: 1988, Page(s):292 - 294
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    The problem of computing image texture features in parallel computers is addressed. It is shown that R. Haralick's texture measures (1973) are amenable to efficient implementation in certain fine-grained architectures. The main operation used to compute these features is the SEND, also called Random Access Write, command. This command is efficiently implemented in a number of computers, such as bi... View full abstract»

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  • Variable structure control of nonlinear multivariable systems: a tutorial

    Publication Year: 1988, Page(s):212 - 232
    Cited by:  Papers (985)  |  Patents (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1496 KB)

    The design of variable-structure control (VSC) systems for a class of multivariable, nonlinear, time-varying systems is presented. Using the Utkin-Drazenovic method of equivalent control and generalized Lyapunov stability concepts, the VSC design is described in a unified manner. Complications that arise due to multiple inputs are examined, and several approaches useful in overcoming them are deve... View full abstract»

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  • Unified presentation of 1/f noise in electron devices: fundamental 1/f noise sources

    Publication Year: 1988, Page(s):233 - 258
    Cited by:  Papers (183)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2099 KB)

    1/f noise in semiconductors, semiconductor devices, and collision-free devices (like vacuum tubes) is presented from a unified point of view, using an extended version of the F.N. Hooge equation (Physica, vol. 83b, p.9, 1976), which is generalized to all collision-dominated systems involving mobility, diffusion, and cross-section fluctuations. It also applies to collision-free processes involving ... View full abstract»

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H. Joel Trussell
North Carolina State University