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Proceedings of the IEEE

Issue 6 • June 1973

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Displaying Results 1 - 19 of 19
  • [Front cover and table of contents]

    Publication Year: 1973, Page(s): c1
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    Freely Available from IEEE
  • Scanning the issue

    Publication Year: 1973, Page(s): 691
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  • A digital signal processing approach to interpolation

    Publication Year: 1973, Page(s):692 - 702
    Cited by:  Papers (345)  |  Patents (45)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (945 KB)

    In many digital signal precessing systems, e.g., vacoders, modulation systems, and digital waveform coding systems, it is necessary to alter the sampling rate of a digital signal Thus it is of considerable interest to examine the problem of interpolation of bandlimited signals from the viewpoint of digital signal processing. A frequency dmnain interpretation of the interpolation process, through w... View full abstract»

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  • Alternatives in digital communications

    Publication Year: 1973, Page(s):703 - 721
    Cited by:  Papers (16)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2209 KB)

    The following major interrelated aspects in digital communications are described: source encoding, channel encoding and transmission, and receiver methods. Methods for digitizing speech and video are summarized. Digitized voice can be transmitted at 10 kb/s, while phone video requires 1.544 Mb/s. The major aspects of both forward-error control (FEC) and automatic request for repeats (ARQ) are cons... View full abstract»

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  • Associative memories and processors: An overview and selected bibliography

    Publication Year: 1973, Page(s):722 - 730
    Cited by:  Papers (26)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1201 KB)

    A survey of associative processing, techniques is presented, together with a guide to the published literature in this field. Some familiarity with the basic concepts of associative-processing is assumed. The references have been divided into four groups dealing with architectural concepts, hardware implementation, software considerations, and application areas. The discussion of architectural con... View full abstract»

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  • Review of CW high-power CO2lasers

    Publication Year: 1973, Page(s):731 - 748
    Cited by:  Papers (23)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2014 KB)

    Various forms of CO2lasers have achieved CW powers in the 60-kW range, operating efficiencies approaching 30 percent, pulse energies of approximately 2000 J, pulsewidths less than 1 ns, peak pulse powers in excess of 109W, a frequency stability of a few parts in 1012, and sealed-off tube lifetimes of many thousands of hours. In addition, the laser can be easily Q-s... View full abstract»

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  • An adaptive array for interference rejection

    Publication Year: 1973, Page(s):748 - 758
    Cited by:  Papers (81)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1786 KB)

    An adaptive array that rejects undesired or interfering signals is presented. The array pattern is controlled by an adaptive feedback system based on a steepest descent minimization of mean-square error. Error is defined as the difference between the array output and a locally generated reference signal. Minimization of mean-square error is closely related to maximization of signal-to-noise ratio ... View full abstract»

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  • Materials and devices using double-pumped-phosphors with energy transfer

    Publication Year: 1973, Page(s):758 - 786
    Cited by:  Papers (10)  |  Patents (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2885 KB)

    The basic phenomena involved in double-pumped phosphors with energy transfer are described and discussed. The role played by successive multiple transfers as well as cooperative processes giving rise to antistokes fluorescence is emphasized for the different kinds of doping which have been used. The field of the different physical experiments is reviewed. Preparation of the most useful hosts is de... View full abstract»

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  • Steady-state analysis of piecewise-linear systems with periodic inputs

    Publication Year: 1973, Page(s):789 - 790
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (237 KB)

    A specific form of a recently proposed algorithm is derived for the rapid determination of the steady-state response of large classes of piecewise-linear systems subjected to periodic inputs. It can be directly incorporated at marginal cost into a computer-oriented state space approach for generating the time domain response of such systems. The algorithm has been successfully applied to several c... View full abstract»

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  • Transient response of a transistor-tunnel diode hybrid combination with resistive feedback

    Publication Year: 1973, Page(s):790 - 792
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    An approach is suggested for studying the transient behavior of a transistor-tunnel diode hybrid combination with resistive feedback which shows an improved switching speed. The method uses the charge-control model for the transistor and empirical power functions for the tunnel diode. Experimental observations with tunnel diode in combination with slow and gold-doped switching transistors demonstr... View full abstract»

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  • On Q of cascaded identical resonators

    Publication Year: 1973, Page(s): 790
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (121 KB)

    It is pointed out that the Q of n identical cascaded resonators, Qn, is related to that of each resonator Q0, by the exact relation Qn/Q0= (21/n- 1)-1/2, which is no more complicated than the approximations developed by Mitra and Huey. View full abstract»

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  • Application of Gunn effect to subnanosecond full adder and full subtractor

    Publication Year: 1973, Page(s):792 - 793
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    An n-bit parallel full adder and a full subtractor employing Gnnn-effect devices are proposed. The important feature is a high-speed carry generator utilizing transverse spreading of high field domains, whose operation is confirmed by computer study. The delay time of these circuits will be reduced to several hundred picoseconds. View full abstract»

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  • Carrier lifetime in semiconductors for steady-state recombination conditions

    Publication Year: 1973, Page(s):793 - 794
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    An extension of the Shockley-Read expression for steady-state lifetime is proposed for inhomogeneous nondegenerate semiconductors under a nonuniform external generation Gn(Gp) of electrons (holes) and in the presence of current flow. The special case of small disturbances in carrier density for a semiconductor with local electrical neutrality is also considered. View full abstract»

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  • High-frequency silicon-on-sapphire IMPATT oscillator

    Publication Year: 1973, Page(s):794 - 795
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (327 KB)

    Epitaxially grown silicon-on-sapphire (SOS) monolithic integrated IMPATT oscillators were fabricated and tested. One diode was successfully operated under pulsed conditions yielding 10-mW peak power output at 13.8 GHz. This experiment serves to demonstrate the feasibility of silicon-on-sapphire monolithic integration at microwave frequencies. View full abstract»

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  • Photon-drag Ge detectors for CO2lasers

    Publication Year: 1973, Page(s):795 - 796
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (253 KB)

    Photon-drag effect in p-type germanium provides simple detectors for CO2lasers. Design parameters of these detectors for various applications are discussed. View full abstract»

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  • AM-to-PM conversion and intermodulation in nonlinear devices

    Publication Year: 1973, Page(s):796 - 797
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (250 KB)

    This correspondence presents a simple derivation of Shimbo's formula for IM distortion due to AM-to-PM conversion and gives it in a form suitable for practical calculation. It also gives a more general relationship between output components of a non-linear device. View full abstract»

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  • On divergence and probability of error in pattern recognition

    Publication Year: 1973, Page(s):798 - 799
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (218 KB)

    An upperbound on the probability of error in classifying a pattern using Bayesian decision criterion is obtained in terms of its divergence and it is shown that the maximization of the divergence of the pattern minimizes this upperbound. Furthermore, a relationship between the divergence of a pattern and its nearest neighbor classification risk is presented. View full abstract»

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  • The frequency response of a superconducting transmission line

    Publication Year: 1973, Page(s):799 - 800
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (211 KB)

    A two-element equivalent circuit for the surface impedance of a superconductor is considered in approximations of the frequency response of a superconducting transmission line. It is shown that the model yields good approximate agreement with more rigorous derivations applied to classical or anomalous normal conductivities, as well as to nonlocal conduction effects. View full abstract»

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  • [Back cover]

    Publication Year: 1973, Page(s): c4
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    Freely Available from IEEE

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H. Joel Trussell
North Carolina State University