Proceedings of the IEEE

Issue 3 • March 1980

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Displaying Results 1 - 25 of 29
  • [Front cover and table of contents]

    Publication Year: 1980, Page(s): c1
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  • Scanning the issue

    Publication Year: 1980, Page(s): 307
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  • The zeros of entire functions: Theory and engineering applications

    Publication Year: 1980, Page(s):308 - 328
    Cited by:  Papers (79)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2182 KB)

    Functions that are analytic over a complex plane are called entire functions. They may be viewed as generalizations of polynomials because they admit power series expansions that converge everywhere. Entire functions are useful models for physical phenomena having finite "spectra," such as important classes of time-varying signals and spatially varying fields. Entire function models may be studied... View full abstract»

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  • Introduction to spread-spectrum antimultipath techniques and their application to urban digital radio

    Publication Year: 1980, Page(s):328 - 353
    Cited by:  Papers (459)  |  Patents (44)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2681 KB)

    In a combination tutorial and research paper, spread-spectrum techniques for combating the effects of multipath on high-rate data transmissions via radio are explored. The tutorial aspect of the paper presents: 1) a heuristic outline of the theory of spread-spectrum antimultipath radio receivers and 2) a summary of a statistical model of urban/suburban multipath. The research section of the paper ... View full abstract»

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  • Theory of electromagnetic transmission structures part I: Relativistic foundation and network formalisms

    Publication Year: 1980, Page(s):354 - 366
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1364 KB)

    A new theorem on a class of four-dimensional skew-symmetric tensors is demonstrated. Coupled with the relativistic covariant form of Maxwell's equations, this theorem consolidates the classifications of guided waves by combining the three types--TE, TM, TEM--under a uniform condition applied to the generating four-potential (A, i φ/c) which is Lorentz invariant. Each type corresponds to a pot... View full abstract»

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  • Picture coding: A review

    Publication Year: 1980, Page(s):366 - 406
    Cited by:  Papers (283)  |  Patents (61)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6666 KB)

    This paper presents a review of techniques used for digital encoding of picture material. Statistical models of picture signals and elements of psychophysics relevant to picture coding are covered first, followed by a description of the coding techniques. Detailed examples of three typical systems, which combine some of the coding principles, are given. A bright future for new systems is forecaste... View full abstract»

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  • The reflected impulse response of a Lorentz medium

    Publication Year: 1980, Page(s):408 - 409
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (196 KB)

    The wave reflected from a Lorentz medium when illuminated by a transverse electric polarized plane wave with impulsive time dependence is expressed as an infinite sum of spherical Bessel functions. This solution is useful in numerical calculation for small and intermediate values of time. For small values of time the Lorentz medium solution simplifies to the result for the impulse response of a co... View full abstract»

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  • Snell's law for light rays in moving isotropic dielectrics

    Publication Year: 1980, Page(s):409 - 410
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (201 KB)

    A modified Snell's law for light rays in uniformly moving isotropic dielectrics is discussed for the case when the velocity of the medium is parallel to the medium-vacuum interface. The direction of the ray in the moving medium is found by using an expression for the magnetic field obtained in a previous work, in the expression for the Poynting vector. The dielectric is assumed nondispersive. View full abstract»

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  • Optimum load admittance for a microwave power transistor

    Publication Year: 1980, Page(s):410 - 411
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (217 KB)

    A theoretical analysis of the output nonlinearity in a microwave transistor shows the relationship between the large-signal output admittance and the optimum load admittance for maximum output power. Both of these admittances depend strongly on the RF signal power level. View full abstract»

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  • A precise large current ratio integrated gain cell

    Publication Year: 1980, Page(s):412 - 413
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (218 KB)

    A monolithic circuit technique is presented whereby large current ratios (≈100) are precisely obtained using only small ratios (<10) of resistances and bias currents. The same circuit functions as an analog multiplier/divider, and also generates useful square-law and square-root characteristics. In general, functions of the form zy, where y > 0 and z > 0, can be realized. View full abstract»

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  • A ROM-controlled thyristor trigger circuit

    Publication Year: 1980, Page(s):413 - 414
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (182 KB)

    A circuit for application in microprocessor-based thyristorpower control is proposed. We specify the READ-ONLY memory (ROM) for linear average output voltage control design and for linear average output power control design. View full abstract»

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  • A simple inverting/noninverting voltage amplifier

    Publication Year: 1980, Page(s):414 - 415
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB)

    It is shown that a recently reported inverting/noninverting amplifier configuration is impractical. An alternate improved circuit is presented which achieves significant bandwidth enhancement at large gains. View full abstract»

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  • Transitional MURROMAF-MURROER filters with additional members

    Publication Year: 1980, Page(s):415 - 417
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (226 KB)

    Recently, a method [4] has been described for the design of transitional MURROMAF-MURROER filters whose members exhibit odd numbers of passband ripple peaks. An additional technique is proposed here to find also those with even numbers of the ripple peaks. Hence, transitional MURROMAF-MURROER filters with complete transitional members. View full abstract»

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  • Novel fourth-order active filters using new three-amplifier generalized immittance converters

    Publication Year: 1980, Page(s):417 - 419
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (306 KB)

    Having voltage source outputs, a new ideal three-amplifier generalized immittance converter is proposed. By skillfully using two new immittance converters, five types of fourth-order direct synthesis active filters are realized. View full abstract»

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  • Comments on "Seismic imaging by holography"

    Publication Year: 1980, Page(s): 419
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  • Improved spectral resolution

    Publication Year: 1980, Page(s):419 - 420
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (275 KB)

    Two new methods are presented for the estimation of the frequencies of closely spaced complex valued sinusoidal signals in the presence of noise. The most effective method is a computationally efficient method for realization of maximum likelihood or maximum posterior probability estimates of the frequencies. The second method is a class of algorithms for removing some of the deficiencies of prese... View full abstract»

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  • Synthetic aperture radar equation

    Publication Year: 1980, Page(s):421 - 422
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (257 KB)

    The synthetic aperture radar equation for extended diffuse clutter depends on the area of such clutter processed by the radar. It is shown here that approximating the illuminated area by the product of the range and azimuth lineal resolutions can give results which are optimistic or pessimistic, depending on the amount of range and azimuth weighting used to suppress sidelobes. View full abstract»

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  • Fuzzy sets versus probability

    Publication Year: 1980, Page(s): 421
    Cited by:  Papers (24)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (144 KB)

    One of the aims of the theory of fuzzy sets is the development of a methodology for the formulation and solution of problems which are too complex or ill-defined to be susceptible to analysis by conventional techniques. Because of its unorthodoxy, it has been and will continue to be controversial for some time. Eventually, though, the theory of fuzzy sets is likely to be recognized as a natural de... View full abstract»

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  • Suppression of range sidelobes in bistatic radars

    Publication Year: 1980, Page(s):422 - 423
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (210 KB)

    Conventional weighting schemes give little or no suppression of some of the range sidelobes of a linear-FM rectangular pulse passed through a matched filter. View full abstract»

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  • An extension of the Gill and Gupta discrete phase-locked loop

    Publication Year: 1980, Page(s):424 - 425
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (167 KB)

    A variation of Gill and Gupta's first- and second-order discrete phase-locked loops (DPLL) is presented here. The novelty is that the sampling intervals lock at half the signal's period, enabling us to obtain a greater bandwidth and an increase in the locking speed. View full abstract»

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  • Nonreciprocal attenuation of magnetoelastic Rayleigh waves on bulk-YIG samples

    Publication Year: 1980, Page(s):425 - 427
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (211 KB)

    Experimental results on nonreciprocal attenuation of magnetoelastic Rayleigh waves are reported for two bulk-YIG samples. In both cases, the nonreciprocity is found to be weak. In particular, the bulk-YIG version of the Lewis-Patterson YIG-film configuration (which exhibited a maximum nonreciprocity of about 20 dBs) is found to be essentially reciprocal. View full abstract»

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  • Take a chance with your calculator: Probability problems for programmable calculators

    Publication Year: 1980, Page(s):428 - 429
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  • Basic business and professional speech communication

    Publication Year: 1980, Page(s): 428
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  • Topics in applied physics

    Publication Year: 1980, Page(s): 429
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  • Transform methods with applications to engineering and operations research

    Publication Year: 1980, Page(s): 429
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H. Joel Trussell
North Carolina State University