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Proceedings of the IEEE

Issue 5 • Date May 1970

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Displaying Results 1 - 25 of 75
  • [Front cover and table of contents]

    Publication Year: 1970, Page(s): c1
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    Freely Available from IEEE
  • Scanning the issue

    Publication Year: 1970, Page(s):607 - 609
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    Freely Available from IEEE
  • An introduction to the theory of the detection of signals in noise

    Publication Year: 1970, Page(s):610 - 623
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1489 KB)

    An introductory discussion is presented in the general field of detection theory, with particular emphasis on the problems of detecting signals in Gaussian noise and of estimating parameters of signals in Gaussian noise. View full abstract»

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  • Nonparametric detection

    Publication Year: 1970, Page(s):623 - 631
    Cited by:  Papers (44)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (860 KB)

    This paper considers some of the simpler nonparametric detection schemes and compares their asymptotic relative efficiencies to those of detectors which are optimal in the Neyman-Pearson sense. In the one-input case, the nonparametric sign and Wilcoxon detectors are compared to the linear detector which is optimal for the detection of a dc signal of unknown amplitude in Gaussian noise. For two-inp... View full abstract»

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  • Decision analysis: Perspectives on inference, decision, and experimentation

    Publication Year: 1970, Page(s):632 - 643
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1159 KB)

    This paper illustrates by using a simple coin-tossing example how the new discipline of decision analysis sheds light on the perennial problems of inference, decision, and experimentation. The inference problem is first discussed from the classical viewpoints of maximum likelihood estimation and hypothesis testing, and then from the viewpoint of subjective probability and Bayesian updating. The pr... View full abstract»

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  • Performance limitations and error calculations for parameter estimation

    Publication Year: 1970, Page(s):644 - 652
    Cited by:  Papers (46)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (806 KB)

    Error calculations cannot be carried out precisely when parameters are estimated which affect the observation nonlinearly. This paper summarizes the available approaches to studying performance and compares the resulting answers for a specific case. It is shown that the familiar Cramér-Rao lower bound on rms error yields an accurate answer only for large signal-to-noise ratios (SNR). For low ... View full abstract»

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  • Applications of state-variable techniques in detection theory

    Publication Year: 1970, Page(s):653 - 669
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1384 KB)

    The central issue in detection theory is that of detecting known or random signals in the presence of random noise. The detailed problem description depends on the physical situation of interest. In most of the original work on detection theory the random processes were modeled as Gaussian processes and characterized by their covariance function. In many cases the solution for the optimum detector... View full abstract»

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  • Detection and estimation of signals in noise when one or both are non-Gaussian

    Publication Year: 1970, Page(s):670 - 679
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (868 KB)

    An examination is made of the basic principles and results of the theory of detection and estimation of signals in noise, which is not limited to the condition that the useful signal and noise be Gaussian and that the noise be additive. Formulas are obtained [(23) and (25)] for likelihood ratios which are useful in the Markovian as well as in the non-Markovian case. The results are specialized for... View full abstract»

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  • The innovations approach to detection and estimation theory

    Publication Year: 1970, Page(s):680 - 695
    Cited by:  Papers (83)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1706 KB)

    Given a stochastic process, its innovations process will be defined as a white Gaussian noise process obtained from the original process by a causal and causally invertible transformation. The significance of such a representation, when it exists, is that statistical inference problems based on observation of the original process can be replaced by simpler problems based on white noise observation... View full abstract»

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  • Multidimensional detection and extraction of signals in random media

    Publication Year: 1970, Page(s):696 - 706
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1228 KB)

    An approach to the general problem of detecting and extracting signals from random media with the help of multichannel (i.e., multidimensional) receivers is described, based on standard decision theory methods and stressing the key role of channel physics and geometry. The principal aim is to provide an illustrative outline of a unified treatment, emphasizing the interdisciplinary character of the... View full abstract»

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  • Parameter estimation in speech: A lesson in unorthodoxy

    Publication Year: 1970, Page(s):707 - 712
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (601 KB)

    The accurate estimation of both discrete and continuous parameters of speech signals has played a central role in speech processing and research. Interestingly, the most successful estimation procedures have often relied on intuition based on knowledge of speech signals and their production in the human vocal apparatus rather than routine applications of well-established theoretical methods. This ... View full abstract»

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  • Application of detection theory in psychophysics

    Publication Year: 1970, Page(s):713 - 723
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1347 KB)

    The paper reviews how current developments in detection theory have contributed to our understanding of human sensory processes. The first section of the paper emphasizes the methodological contributions of detection theory and how the theory is useful in the analysis of discrimination data. Next, a brief discussion of the substantive contribution of the theory in auditory research is considered. ... View full abstract»

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  • Frequency discrimination in the auditory system: Place or periodicity mechanisms?

    Publication Year: 1970, Page(s):723 - 730
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1122 KB)

    The pattern of all-or-none firings in many sensory nerves can usefully be modeled as a set of sample functions from non-stationary random processes whose parameters are determined by the sensory stimulus. Given such a description, one can compare the parameter estimation, discrimination, or detection performance of a human observer (as measured behaviorally) with the computed limiting performance ... View full abstract»

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  • Sequential methods in radar detection

    Publication Year: 1970, Page(s):731 - 743
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1387 KB)

    Certain sequential tests of statistical hypotheses known as sequential probability ratio tests (SPRT) possess an optimum property that they can accelerate, on the average, the termination of the test or alternately execute the test in the same time with less error, or with the same error but on less distinguishable hypotheses than a fixed sample-size test. These properties are of practical importa... View full abstract»

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  • Detection and estimation practices in radio and radar astronomy

    Publication Year: 1970, Page(s):743 - 759
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2891 KB)

    A review is given of detection and estimation methods in current use in radio and radar astronomy. Methods of determining position and brightness distribution of radio sources by narrow-beam antennas, interferometry or lunar occultations are discussed. Observational procedures for the estimation of frequency spectra are explained. The fundamental problem in radar astronomy, viz., that of mapping, ... View full abstract»

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  • Applications of detection and estimation theory to large array seismology

    Publication Year: 1970, Page(s):760 - 770
    Cited by:  Papers (12)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1045 KB)

    The statistical theory of signal detection and estimation has been applied to problems in large array seismology. Using this theory the structure of the optimum detector for a known signal and long observation time in additive Gaussian noise is derived. The array processing filter employed by the optimum detector is known as the maximum-likelihood filter. This filter also has the property that it ... View full abstract»

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  • Applications of space-time decision and estimation theory to antenna processing system design

    Publication Year: 1970, Page(s):771 - 778
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (721 KB)

    A mathematical solution to the problem of optimum radar target detection and parameter estimation in receiver noise and heavy clutter has been achieved by means of space-time decision theory. The theory leads to a conceptual design for an antenna processing system that is optimum in the sense that it makes least risk parameter estimates and least probability of error decisions. The system can be i... View full abstract»

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  • Statistical detection for communication channels with intersymbol interference

    Publication Year: 1970, Page(s):779 - 785
    Cited by:  Papers (160)  |  Patents (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (645 KB)

    The optimum detector under a fixed delay constraint D is derived for channels having memory and additive noise. The resulting receiver is recursive and does not grow with the message length. Its structure is presented for linear channels (AM and PSK) with known (or estimated) impulse response and noise statistics. The intersymbol interference is assumed to extend for L sampling periods and the rec... View full abstract»

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  • Junction-gate FET RF power amplifier

    Publication Year: 1970, Page(s):789 - 790
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (466 KB)

    A junction-gate power field-effect transistor of recent design has been found to yield greater than 25 watts CW at 30 MHz in two modes of circuit configuration. In this investigation, favorable characteristics are explored for potential device utility as a high-reliability low-distortion RF power amplifier. View full abstract»

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  • An avalanche photodiode with a tapered light-focusing fiber guide

    Publication Year: 1970, Page(s):790 - 791
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (463 KB)

    The light-receiving area of an avalanche photodiode has been effectively enlarged by means of a tapered light-focusing fiber guide. View full abstract»

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  • Visualization of internal structure by microwave holography

    Publication Year: 1970, Page(s):791 - 792
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (880 KB)

    Microwave holography was used for the visualization of an internal structure within a dielectric. Descriptions are given of 1) the preparation of the liquid crystal film to be used for mapping the microwave field, and 2) the application of the liquid crystal film in the fabrication of a microwave hologram to visualize the internal structure within a dielectric. View full abstract»

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  • The turn-on delay time of silicon p-n-p-n switches

    Publication Year: 1970, Page(s):792 - 793
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (249 KB)

    The turn-on delay time of silicon p-n-p-n switches has been experimentally shown to be inversely proportional to gate currents in excess of the threshold value. Based on the measurements of bidirectional p-n-p-n switches, it is demonstrated that p-n-p-n structures with remote gating have inherently longer turn-on delay times than those of the conventional construction having the gate lead attached... View full abstract»

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  • On the radar cross section of a dipole

    Publication Year: 1970, Page(s):793 - 794
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (242 KB)

    Literature references dealing with the radar cross section of a dipole target contain a possible source of confusion in that two definitions of cross section have been used. To clarify this situation, the radar cross section of a randomly oriented half-wave dipole is considered using both definitions. View full abstract»

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  • Comment on "Solution of Laplace's equation in a region with dielectric interfaces of arbitrary shape"

    Publication Year: 1970, Page(s):794 - 795
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  • An active butterworth frequency discriminator

    Publication Year: 1970, Page(s):795 - 796
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (172 KB)

    An active realization for a bandpass maximally flat, linear amplitude filter is presented. The filter displays a linear amplitude rise with an increasing frequency change about a center point out to cutoff frequenoies beyond which the response falls off at a rate determined by the order of the filter. View full abstract»

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North Carolina State University