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Proceedings of the IEEE

Issue 2 • Feb. 1986

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Displaying Results 1 - 25 of 25
  • [Front cover and table of contents]

    Publication Year: 1986, Page(s): c1
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  • The special section on geotomography

    Publication Year: 1986, Page(s):243 - 244
    Cited by:  Papers (2)
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  • Scanning the issue

    Publication Year: 1986, Page(s): 243
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  • Polarization diversity in radars

    Publication Year: 1986, Page(s):245 - 269
    Cited by:  Papers (197)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2361 KB)

    Polarization, together with the amplitude, time, frequency, phase, and bearing descriptors of radar signals, completes the information which can be obtained on target returns in monostatic radars. The exploitation of information on the echo polarization state through polarimetric radars is currently a subject of interest, due to theoretical and technological advances, as well as to the development... View full abstract»

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  • Wave digital filters: Theory and practice

    Publication Year: 1986, Page(s):270 - 327
    Cited by:  Papers (537)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6337 KB)

    Wave digital filters (WDFs) are modeled after classical filters, preferably in lattice or ladder configurations or generalizations thereof. They have very good properties concerning coefficient accuracy requirements, dynamic range, and especially all aspects of stability under finite-arithmetic conditions. A detailed review of WDF theory is given. For this several goals are set: to offer an introd... View full abstract»

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  • Seismic borehole tomography—Theory and computational methods

    Publication Year: 1986, Page(s):328 - 338
    Cited by:  Papers (40)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (906 KB)

    Tomographic inversion can be applied to seismic traveltime data to obtain a map of seismic velocities in a rock volume, although the field geometries will not, in general, allow a complete ray sampling. This paper deals with theoretical and computational aspects of tomographic inversion under such circumstances. It is shown that some usual measurement geometries could, in theory, be sufficient for... View full abstract»

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  • Seismic borehole tomography—Measurement system and field studies

    Publication Year: 1986, Page(s):339 - 346
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (857 KB)

    A system for seismic tomographic measurements is presented, and both hardware and software are described. The system is intended to operate in the distance range 100-1000 m. An explosive source is used to generate signals which are picked up by receivers at the surface and in boreholes. Tomographic results from two field experiments are presented. The first experiment concerns mapping of an ore bo... View full abstract»

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  • Recent experiments using geophysical tomography in fractured granite

    Publication Year: 1986, Page(s):347 - 352
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1460 KB)

    This paper provides overviews of recent field experiments where the geophysical tomography method was used to investigate fractures between boreholes and an overview of factors pertinent to accuracy, resolution, and data interpretation. High-frequency electromagnetic waves (5-40 MHz) were used in the field to investigate a fractured granitic rock mass between boreholes separated by up to 30 m. Geo... View full abstract»

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  • Synthesis of EM geophysical tomographic data

    Publication Year: 1986, Page(s):353 - 360
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (461 KB)

    In order to test tomographic inversion schemes under controlled conditions, we have developed a forward electromagnetic model, using the volume current method (VCM). The algorithm can handle thin irregular-shaped bedding planes as well as inclusions or localized anomalies. It is thus ideal for modeling oil trap regions in the earth. Both transmission and reflection images, in magnitude and phase, ... View full abstract»

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  • Comments on "The gain-resistance product of the half-wave dipole"

    Publication Year: 1986, Page(s):363 - 365
    Cited by:  Papers (1)
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  • Longest binary pulse compression codes with given peak sidelobe levels

    Publication Year: 1986, Page(s): 366
    Cited by:  Papers (36)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (109 KB)

    For peak sidelobe levels of 3, 4, and 5, three new binary pulse compression codes are presented of lengths 51, 69, and 88, respectively. View full abstract»

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  • Simulation of floating impedances for low-frequency active filter design

    Publication Year: 1986, Page(s):366 - 368
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (238 KB)

    A new circuit for the simulation of floating inductors, capacitors, and FDNRs is proposed. The circuit is easy to design and to tune. It permits the realization of impedances with high element values and is therefore well suited for the design of low-frequency active filters. View full abstract»

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  • A new fast-response double-loop phase-lock loop

    Publication Year: 1986, Page(s):368 - 369
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (204 KB)

    A new method of constructing phase-lock loop systems with wide capture range and fast response is suggested. The suggested systems employ the relatively well-known double-loop configuration. They are unusual in the sense that the two multipliers (phase detectors) are replaced by one divider. View full abstract»

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  • Estimation of frequencies of multiple two-dimensional sinusoids: Improved methods of linear prediction

    Publication Year: 1986, Page(s):369 - 371
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (281 KB)

    Two previously proposed methods of Tufts and Kumaresan for estimating paired frequency-wavenumber values of multiple two-dimensional (2-D) sinusoids are evaluated in more detail using results of simulations. View full abstract»

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  • Computationally efficient digital filters

    Publication Year: 1986, Page(s):371 - 373
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    A method for designing high-performance digital filters using only a relatively small number of shift-and-add operations per signal sample is demonstrated. View full abstract»

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  • An integrated multiplexing and switching techniques for adaptive delta modulation

    Publication Year: 1986, Page(s):373 - 374
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (188 KB)

    A signal processing technique for multiplexed conversion of a large number of speech channels into adaptive delta modulation channels has been presented. This is based on fast decision circuits, buffer memories, and pipelined processing. A microprocessor control circuit permits channel switching through buffer memories, making it attractive for LSI oriented small exchanges. View full abstract»

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  • A nonexpansive monotonicity constraint operator for use in constrained iterative deconvolution

    Publication Year: 1986, Page(s):374 - 375
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (186 KB)

    This letter describes a nonexpansive monotonicity constraint operator. It can be used in constrained iterative deconvolution in order to compute impulse response functions which are known to be piecewise monotonous or piecewise constant. The operator may also be combined with, for instance, positivity and finite support constraint operators to put further constraints upon the impulse response func... View full abstract»

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  • A polynomial time algorithm for subpattern matching

    Publication Year: 1986, Page(s):375 - 377
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (269 KB)

    An O(N3K) time algorithm for searching matches of a template of size K in an image of size N is given. It uses bounding regions and the Soviet Ellipsoid Algorithm [1]. It will work under moderately heavy shift noise. View full abstract»

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  • Application of a multivariable self-tuning predictor

    Publication Year: 1986, Page(s):377 - 379
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (251 KB)

    A multivariable predictor algorithm is presented which can produce multistep prediction of a stochastic time series. The algorithm is used to predict product quality in an iron-ore sintering process. The application uses a modified low-pass filtering technique involving less time lag than conventional filters. View full abstract»

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  • Ergodic theory

    Publication Year: 1986, Page(s): 380
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  • Information system methodologies

    Publication Year: 1986, Page(s):380 - 381
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  • CP/M and the personal computer

    Publication Year: 1986, Page(s):381 - 382
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  • Medical imaging systems

    Publication Year: 1986, Page(s): 382
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  • Book alert

    Publication Year: 1986, Page(s): 383
    Cited by:  Papers (1)
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  • [Back cover]

    Publication Year: 1986, Page(s): c4
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The most highly-cited general interest journal in electrical engineering and computer science, the Proceedings is the best way to stay informed on an exemplary range of topics.

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Meet Our Editors

Editor-in-Chief
H. Joel Trussell
North Carolina State University