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IEEE Transactions on Communications

Issue 5 • May 1976

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Displaying Results 1 - 16 of 16
  • [Front cover and table of contents]

    Publication Year: 1976, Page(s): 0
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    Freely Available from IEEE
  • Transmission Characteristics of an M-ary Coherent PSK Signal Via a Cascade of N Bandpass Hard Limiters

    Publication Year: 1976, Page(s):540 - 545
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (490 KB)

    This paper provides a general analysis of the transmission characteristics of a coherent PSK signal, where anM-ary coherent signal is transmitted via a repeater system composed of a cascade ofNbandpass hard limiters. The probability density function of a composite phase of the signal and noise over the system is newly derived to obtain an error probability. In addition, the c... View full abstract»

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  • Proof of a Conjecture on the Interarrival-Time Distribution in an M/M/1 Queue with Feedback

    Publication Year: 1976, Page(s):575 - 576
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (175 KB)

    In a Jackson-type queuing network with feedback, the equilibrium state distribution of each queue is that of anM/M/ssystem. In support of a previous conjecture that nevertheless the input processes in such a network are not Poisson, the marginal interarrival-time distribution for an equilibriumM/M/1queuing system with feedback, counting both fed-back and exogenous customers a... View full abstract»

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  • Correction to "A Per-Channel A/D Converter Having 15-Segment µ-255 Companding"

    Publication Year: 1976, Page(s): 576
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (71 KB)

    First Page of the Article
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  • [Back cover]

    Publication Year: 1976, Page(s): 0
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    Freely Available from IEEE
  • Generalizations of the Sign Detector Based on Conditional Tests

    Publication Year: 1976, Page(s):481 - 487
    Cited by:  Papers (28)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (640 KB)

    Generalizations of the simple sign detector are considered for nonparametric detection. Nonparametric operation is obtained with only a symmetry assumption on the noise density functions, by basing the detectors on conditional statistical tests. The performance (both asymptotic and finite-sample, finite-signal) of the generalized sign detector is shown to be very good compared to the Wilcoxon dete... View full abstract»

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  • Detecting the Presence of Speech Using ADPCM Coding

    Publication Year: 1976, Page(s):563 - 567
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1024 KB)

    When speech is coded using a differential pulse-code modulation system with an adaptive quantizer, the digital code words exhibit considerable variation among all quantization levels during both voiced and unvoiced speech intervals. However, because of limits on the range of step sizes, during silent intervals the code words vary only slightly among the smallest quantization steps. Based on this p... View full abstract»

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  • The Detection of Signals in Impulsive Noise Modeled as a Mixture Process

    Publication Year: 1976, Page(s):559 - 563
    Cited by:  Papers (56)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    A first-order mixture noise density is considered as a model for impulsive noise channels. It consists of a mixture of a small variance, probably Gaussian, background noise pdf and a large variance impulsive pdf. Optimal nonlinear detector structures for known discretetime signals in such noise are derived. Their large-sample performance compared to that of a linear detector is studied using asymp... View full abstract»

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  • Performance of Phase-Locked Loops in the Presence of Fading Communication Channels

    Publication Year: 1976, Page(s):487 - 499
    Cited by:  Papers (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1040 KB)

    An approach is presented for the analysis of phase-locked loops whose input signal has passed through time-varying channels. The specific channels considered in detail are the Rice-Nakagami, Rayleigh, and lognormal fading channels. Loop performance is characterized in terms of the steady-state probability density function of the reduced phase error process. The basic parameters which characterize ... View full abstract»

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  • The Capture Effect in FM Receivers

    Publication Year: 1976, Page(s):531 - 539
    Cited by:  Papers (34)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    In this paper a theoretical explanation of the capture effect is given by calculating the instantaneous frequency of the output signal of a limiter when two frequency modulated (FM) signals are present at the limiter input. When this signal is applied to a demodulator with unlimited bandwidth, the output signal of the demodulator proves to have an extreme capture effect. When however the demodulat... View full abstract»

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  • A New Class of Algorithms for Multipoint Network Optimization

    Publication Year: 1976, Page(s):500 - 505
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    A class of second-order greedy algorithms (SOGA) for the optimization of multipoint networks is defined that is capable of generating improved solutions to problems by an average of more than two percent, relative to the solutions generated by the Esau-Williams algorithm. These SOGA utilize repeated calls of a modified Esau-Williams procedure. They consequently take much longer to execute than doe... View full abstract»

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  • Impulse Noise Performance Bounds for Binary Correlation Receivers

    Publication Year: 1976, Page(s):553 - 559
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (600 KB)

    A general performance equation is derived for digital receivers in the presence of impulse noise. Two bounding techniques are employed to simplify the results. First, the Schwarz inequality removes the dependence on both the impulse noise waveforms and the signal-set basis functions. Second, the Chebyshev inequality is applied to the Schwarz results to additionally eliminate the statistical depend... View full abstract»

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  • Signal Design for Low-Error Probability in Fading Dispersive Channels

    Publication Year: 1976, Page(s):567 - 575
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (672 KB)

    The signal design problem for FSK communication via fading dispersive channels is considered. The channel is modeled as a linear filter whose time-varying impulse response is a sample function from a zero-mean Gaussian random field of arbitrary WSSUS type. The additive noise component in the received waveforms is supposed to be a zero-mean white Gaussian random process, and maximum likelihood demo... View full abstract»

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  • The Effects of Transponder Nonlinearity on Binary CPSK Signal Transmission

    Publication Year: 1976, Page(s):546 - 553
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    An analytical approach is developed to investigate the performance of coherent phase-shift keying (CPSK) systems transmitted through a nonlinear satellite transponder. A novel quadrature model of the satellite nonlinearity is introduced, and is found to yield an excellent fit to the actual traveling wave tube (TWT) characteristics as commonly used in a satellite transponder, with the advantage of ... View full abstract»

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  • Effects of a Priority Discipline in Routing for Packet-Switched Networks

    Publication Year: 1976, Page(s):506 - 516
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1040 KB)

    This paper addresses itself to some comparisons of adaptive routing algorithms in store-and-forward Communication nets. The intent here is to demonstrate how some relatively simple add-ons to already existing adaptive algorithms can decrease the average message delay and increase message throughput in the network. The overview of many existing routing algorithms is intended to point out that, alth... View full abstract»

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  • Timing Recovery in Digital Synchronous Data Receivers

    Publication Year: 1976, Page(s):516 - 531
    Cited by:  Papers (294)  |  Patents (172)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1432 KB)

    A new class of fast-converging timing recovery methods for synchronous digital data receivers is investigated. Starting with a worst-case timing offset, convergence with random binary data will typically occur within 10-20 symbols. The input signal is sampled at the baud rate; these samples are then processed to derive a suitable control signal to adjust the timing phase. A general method is outli... View full abstract»

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Aims & Scope

IEEE Transactions on Communications focuses on all telecommunications including telephone, telegraphy, facsimile, and point-to-point television by electromagnetic propagation.

 

 

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Meet Our Editors

Editor-in-Chief
Naofal Al-Dhahir
University of Texas at Dallas