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Transactions of the IRE Professional Group on Information Theory

Issue 3 • Date March 1954

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Displaying Results 1 - 13 of 13
  • Passage of stationary processes through linear and non-linear devices

    Publication Year: 1954, Page(s):4 - 25
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1260 KB)

    Many problems in the theory of noise and other random functions can be formulated as the problem of finding the probability distribution of the functional $u = intlimits^infty_0 K(t') , V, (X (t'))dt'$ where K(t) and V(x) are known functions and x(t) is a random function of known statistical properties. The problem of finding the probability distribution of the noise output of a receiver consistin... View full abstract»

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  • Statistical theory of signal detection

    Publication Year: 1954, Page(s):26 - 51
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2134 KB)

    A complete theory of detection is presented, which is capable of treating general types of signals (e.g. periodic, aperiodic, random) in noise of arbitrary statistical character. By proper formulation of the detection problem as a test of statistical hypotheses, the precise structure of the optimum detector can be specified and minimum detectable signals uniquely determined. For threshold receptio... View full abstract»

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  • The detectability of random signals in the presence of noise

    Publication Year: 1954, Page(s):52 - 62
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (769 KB)

    This morning you have heard excellent presentations of two fields of endeavor, the results and techniques of which could be basic to a statistical theory of communication engineering. On the one hand, the field of statistical inference, as applied to discrete stochastic processes, has developed to a refined point due to the efforts of many statisticians. ï¿¿ï¿¿ï¿¿ The work of the late Professor Wa... View full abstract»

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  • The response of linear systems to non-Gaussian noise

    Publication Year: 1954, Page(s):63 - 67
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    A fairly broad class of problems deals with the way certain properties of noise are altered on passage through a linear system. Fig. l defines these properties. If any n instants of time are chosen and if boundary value problems of the zero crossing type are omitted, the specification of the n dimensional probability distribution yields the most complete statistical information. Very often, howeve... View full abstract»

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  • Estimation of signal parameters in the presence of noise

    Publication Year: 1954, Page(s):68 - 89
    Cited by:  Papers (37)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1288 KB)

    This paper is concerned with certain applications of the estimation theory of Fisher and Cramer[1] to the problem of estimating signal parameters in the presence of noise. Specifically, the situation to be treated is as follows. A received signal View full abstract»

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  • The use of the method of maximum likelihood in estimating continuous-modulated intelligence which has been corrupted by noise

    Publication Year: 1954, Page(s):90 - 105
    Cited by:  Papers (36)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (950 KB)

    A signal is received in the time interval (t ¿ T ¿ ¿ ¿ t). It is known that this signal is composed of noise plus intelligence a(t) which is statistical in nature and which has been modulated in some known way. Assuming that both intelligence and noise are Gaussian (although not necessarily stationary) time series, the analog of the classical maximum-likelihood estimate for ¿(t) is derived. T... View full abstract»

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  • Detection of modulated noise-like signals

    Publication Year: 1954, Page(s):106 - 122
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (835 KB)

    The detection of several interfering modulated noise-like signals is described and an expression is derived for the resultant correlation function, The correlation function is used to demonstrate the modulation suppression action of a linear detector for the general case of signals of noise-like character. Since the detection process suppresses the temporal variations of the weaker signals in one ... View full abstract»

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  • Statistically almost optimum nonlinear network design

    Publication Year: 1954, Page(s): 123
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (283 KB)

    The statistically-optimum unstable filter to separate desired signals from noise and other undesired signals is shown to take the form of a high gain amplifier, with several output channels, each one of which computes the best statistical measure of one of the signals or the noise. The sum of these outputs comprises a negative feedback circuit. The imposition of the requirement of stability on the... View full abstract»

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  • Simpie games of strategy occurring in communication through natural languages

    Publication Year: 1954, Page(s):124 - 137
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1327 KB)

    The purpose of the investigation to be reported here differs in one essential respect from the purpose of most statistical studies on problems of communication. We wish to state this difference from the beginning, in order to avoid misunderstanding of the methods used later on. Most communication problems are, broadly speaking, engineering problems; that is, they deal with the construction and eva... View full abstract»

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  • Application of linear graphs to communication problems

    Publication Year: 1954, Page(s): 138
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (246 KB)

    Codes have been discussed recently in connection with signal compression and noise reduction in communication theory, and they are here defined as transformations between two time series of discrete symbols. The electronic apparatus which performs the transformation, or any part of the apparatus, can be described by a linear graph which represents transitions between different memory-states. It wi... View full abstract»

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  • Mlnimum-cost encoding of information

    Publication Year: 1954, Page(s):139 - 149
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (921 KB)

    Haying determined a cost in energy, time, or money of transmitting each of a set of symbols (e.g., dot and dash, pulses of various amplitudes, etc.), one may inquire as to the nature of a code using these symbols which will transmit a given amount of information at the least cost, or will transmit information at a given rate for the least cost per unit time. Such a code must use each symbol with a... View full abstract»

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  • Generalized servomechanism evaluation

    Publication Year: 1954, Page(s): 150
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    In the course of staking general evaluations of servo systems utilizing magnetic amplifiers, the inadequacy of classical methods becomes immediately evident. Statistical treatment of the signal and the system error is neccessary criteria of performance other than the quadratic are essential; and it is possible that accurate evaluation can result only from including the effects of the inherent non-... View full abstract»

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  • Optimum pulse-time determination

    Publication Year: 1954, Page(s):151 - 159
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (689 KB)

    A common problem in radar, navigation systems or pulse-time modulation systems is that of determination of the delay or time of arrival of a pulse or other distinctive modulation form. while considerable effort has been directed toward the optimization in various senses of the signal-to-noise ratios for such signals, the problem of the most accurate determination of time delay of signals in noise ... View full abstract»

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Aims & Scope

This Transactions ceased production in 1954. The current retitled publication is IEEE Transactions on Information Theory.

Full Aims & Scope