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IEEE Transactions on Information Theory

Issue 4 • Date July 1969

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Displaying Results 1 - 19 of 19
  • Review of 'Algebraic Coding Theory' (Berlekamp, E. R.; 1968)

    Publication Year: 1969, Page(s):509 - 510
    Cited by:  Papers (1)
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    Freely Available from IEEE
  • Review of 'Principles of Data Communication' (Lucky, R. W., et al; 1968)

    Publication Year: 1969, Page(s): 510
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    Freely Available from IEEE
  • Feedback communication using orthogonal signals

    Publication Year: 1969, Page(s):478 - 483
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (800 KB)

    We consider a feedback communication system in which the forward and feedback channels are disturbed by additive noise and constrained in average power. Two block coding schemes are proposed in which the signals are orthogonal waveforms. A finite number of forward and feedback transmissions per message is made. Information received over the feedback channel is used to reduce the expected value of ... View full abstract»

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  • Measurement of random time-variant linear channels

    Publication Year: 1969, Page(s):469 - 475
    Cited by:  Papers (39)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1064 KB)

    This paper concerns the problems of the measurability and measurement of random time-variant linear channels. With regard to measurability, a new, less stringent channel measurability criterion is proposed to supersede the BL product introduced by Kailath. This criterion involves the area of occupancy of the Doppler-delay spread function (or its dual). By using time and bandwidth constraints on th... View full abstract»

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  • Information rates for photocount detection systems

    Publication Year: 1969, Page(s):465 - 468
    Cited by:  Papers (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    A model that allows one to calculate information rates for optical communication systems that use photocount detection is presented. This model has its basis in the coherent states of the field. It consists of a source that places the field in a coherent state, a channel that can introduce additive Gaussian noise, and a photodetector that produces the number of photocounts in the detection interva... View full abstract»

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  • Conjugate linear filtering

    Publication Year: 1969, Page(s):462 - 465
    Cited by:  Papers (51)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    Aspects of optimum filtering for complex valued random processes are presented. Ordinary linear filters are complemented with conjugate linear filters. It is found that the incorporation of conjugate linear filtering improves signal-to-noise ratio by a factor of two in matched filter receivers. For optimum least squares filtering the inclusion of conjugate processing reduces mean-square error by a... View full abstract»

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  • Optimal recursive estimation with uncertain observation

    Publication Year: 1969, Page(s):457 - 462
    Cited by:  Papers (328)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (816 KB)

    In classical estimation theory, the observation is always assumed to contain the signal to be estimated. In practice, certain observations, or sequences of observations, may contain noise alone, only the probability of occurrence of such cases being available to the estimator. An example is trajectory tracking where the signal is first detected and then the estimator is allowed to process it for t... View full abstract»

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  • The correlation function of Gaussian noise passed through nonlinear devices

    Publication Year: 1969, Page(s):448 - 456
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (976 KB)

    This paper is concerned with the output autocorrelation function R^{y} of Gaussian noise passed through a nonlinear device. An attempt is made to investigate in a systematic way the changes in R^{y} when certain mathematical manipulations are performed on some given device whose correlation function is known. These manip... View full abstract»

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  • Bounds on the variation and bandwidth of a band-limited signal (Corresp.)

    Publication Year: 1969, Page(s):499 - 500
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

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  • Bayesian decision procedure for interfering digital signals (Corresp.)

    Publication Year: 1969, Page(s):506 - 507
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    The Bayesian decision procedure is given to determine a finite sequence of n m -ary (m \geq 2) digits that have been transmitted through a channel that has memory and introduces additive noise. Minimum probability of digit estimation error is used as the criterion of goodness. Intersymbol interference at the receiver inp... View full abstract»

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  • On a general relationship between estimation, detection, and the Bhattacharyya coefficient (Corresp.)

    Publication Year: 1969, Page(s):504 - 505
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    A general and fundamental relationship between estimation, detection/pattern recognition, and the Bhattacharyya coefficient is established. Specifically, it is shown that a functional of the likelihood ratio necessary for Bayes optimal detection/pattern recognition is the Bayes-optimal mean-square estimate of the indicator variable \beta , where View full abstract»

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  • On the equivalence of Kramer's and Shannon's sampling theorems (Corresp.)

    Publication Year: 1969, Page(s):497 - 499
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    The question of Campbell concerning the possibility of applying Shannon's sampling theorem to the same functions that can be sampled by Kramer's generalized sampling theorem is investigated and illustrated for more functions which are solutions of second-order differential equations with singular coefficients. A few definitions are introduced and some theorems are proved to show, in a more precise... View full abstract»

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  • The efficiency of level tests in the detection of weak stochastic signals (Corresp.)

    Publication Year: 1969, Page(s):502 - 504
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    The efficiency of a class of test statistics for the detection of a stochastic signal in Gaussian and non-Gaussian white noise is examined. The tests are computationaUy simple, but not distribution free. In Gaussian noise these tests surpass two commonly used detection procedures. View full abstract»

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  • Binary communication over the Gaussian channel using feedback with a peak energy constraint

    Publication Year: 1969, Page(s):476 - 478
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    We consider binary communication over the additive white Gaussian noise channel with no bandwidth constraint on the channel input signals, assuming the availability of a noiseless delayless feedback link. Although the signals at time t can depend on the noise at times \tau < t and are therefore random functions, we requir... View full abstract»

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  • On monotonicity of conditional expectations (Corresp.)

    Publication Year: 1969, Page(s):501 - 502
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    First Page of the Article
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  • Reliability function of a band-limited signaling scheme with feedback (Corresp.)

    Publication Year: 1969, Page(s):507 - 508
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    The performance of a band-limited signaling scheme for an additive white Gaussian noise channel with noiseless feedback is presented. View full abstract»

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  • Bounds for truncation error in sampling expansions of band-limited signals

    Publication Year: 1969, Page(s):440 - 444
    Cited by:  Papers (36)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    For f(t) a real-valued signal band-limited to - \pi r \leq \omega \leq \pi r (0 < r < 1) and represented by its Fourier integral, upper bounds are established for the magnitude of the truncation error when f(t) is approximated at a generic time t View full abstract»

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  • An adaptive receiver for digital signaling through channels with intersymbol interference

    Publication Year: 1969, Page(s):484 - 497
    Cited by:  Papers (88)  |  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2024 KB)

    A tutorial paper on an adaptive receiver that is suitable for high-speed digital signaling over slowly time-varying, band-limited channels which have impulse responses that are unknown at the receiver is presented. The receiver utilizes a steepest-descent technique for adjusting its parameters to existing channel conditions. A treatment of the speed of adaptation of the receiver is included. View full abstract»

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  • Approximating discrete probability distributions

    Publication Year: 1969, Page(s):444 - 447
    Cited by:  Papers (49)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    The method of minimum discrimination information estimation is applied to the problem of estimating an n -dimensional discrete probability distribution in terms of lower order marginal distributions. The procedure provides a convergent iterative algorithm. The method yields regular best asymptotically normal (RBAN) estimates. The general procedure includes as a... View full abstract»

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Aims & Scope

IEEE Transactions on Information Theory publishes papers concerned with the transmission, processing, and utilization of information.

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Meet Our Editors

Editor-in-Chief
Frank R. Kschischang

Department of Electrical and Computer Engineering