IEEE Transactions on Communications

Issue 8 • August 1983

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Displaying Results 1 - 14 of 14
  • [Front cover and table of contents]

    Publication Year: 1983, Page(s): 0
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    Freely Available from IEEE
  • New Results on Robust Quantization

    Publication Year: 1983, Page(s):965 - 974
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (967 KB)

    In this paper we consider the design of robust block quantizers when the number of quantization levels is large. Therth power distortion measure is utilized through the convenient expression developed by Bennett and Gersho. The robust design is formulated as a two-person game, and it is shown that for convex families of signal probability density functions there is a saddle point soluti... View full abstract»

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  • Costas Loop Experiments for a 10.6 µm Communications Receiver

    Publication Year: 1983, Page(s):1000 - 1002
    Cited by:  Papers (31)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (435 KB)

    We have transferred the principle of the Costas-type nonlinear phase-locked loop to thelambda = 10.6 mum wavelength of CO2lasers. The ability of the optical Costas loop to regenerate the carrier of a binary phase-shift-keyed input signal and to perform coherent demodulation was demonstrated at a data rate of 20 Mbits/s. View full abstract»

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  • A Novel Low-Distortion Wide-Band FM Generator

    Publication Year: 1983, Page(s):1021 - 1024
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    A new technique for generating a wide-band frequencymodulated sinusoidal carrier is presented. The frequency-modulated square-wave output of a voltage-controlled oscillator (VCO) is first filtered through a constant-Qswitched capacitor-type tracking bandpass filter (BPF) whose switched sinusoidal FM output is then passed through anRCtracking low-pass filter (LPF). The modulat... View full abstract»

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  • [Back cover]

    Publication Year: 1983, Page(s): 0
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    Freely Available from IEEE
  • Theory of Multiplicative Noise Caused by Coupling Loss and Amplitude Vector Rotation in Optical Communication Channels

    Publication Year: 1983, Page(s):992 - 999
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (640 KB)

    From a general optical channel model, it is shown that the coupling loss intensity noise generated at connections of optical channels is caused by amplitude vector rotation and its dependency upon the coupling coefficient. The shape of the polarization is not important. This noise becomes muitiplicative noise so that the noise disturbs signals directly even if fluctuations of rotation of the ampli... View full abstract»

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  • On the Capacity of Multihop Slotted ALOHA Networks with Regular Structure

    Publication Year: 1983, Page(s):974 - 982
    Cited by:  Papers (76)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    In this paper we investigate the capacity of networks with a regular structure operating under the slotted ALOHA access protocol. We first consider circular (loop) and linear (bus) networks and then proceed to two-dimensional networks. For one-dimensional networks we find that the capacity is basically independent of the network average degree and is almost constant with respect to network size. F... View full abstract»

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  • A Simplified Method for Prediction of Multipath Fading Outage of Digital Radio

    Publication Year: 1983, Page(s):1017 - 1021
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    We propose a simplified method based on the correlated Rayleigh probability distribution of in-band radio signals. It can be efficiently applied to the calculation of the outage for various radio path length, propagation terrain, radio frequency, bandwidth, and digital modulation techniques. Predicted results are compared to various propagation data. View full abstract»

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  • Control Algorithms for Rearrangeable Clos Networks

    Publication Year: 1983, Page(s):952 - 954
    Cited by:  Papers (35)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    Recently interest in rearrangeable Clos networks has risen again, due to their potential uses in data networks and computing systems. Much research has been directed towards the construction of efficient control algorithms. However, the literature has seemed not to be aware of an important link between the control algorithms and the edge coloring algorithms for bipartite graphs. In this paper we s... View full abstract»

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  • Tracking of Frequency-Hopped Spread-Spectrum Signals in Adverse Environments

    Publication Year: 1983, Page(s):955 - 964
    Cited by:  Papers (8)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (672 KB)

    Tracking requirements for a frequency-hopped spreadspectrum system with a view to application in mobile radio are investigated. Models characterizing Rician fading and multiple access or jamming environments are used to formulate signal detection probabilities. These determine the mean time to loss of lock. Optimized tracking in these environments is then considered. View full abstract»

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  • A DPCM System Based on a Composite Image Model

    Publication Year: 1983, Page(s):1003 - 1017
    Cited by:  Papers (3)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1240 KB)

    This paper presents a DPCM system for storage or transmission (via noiseless channel) of a moving (3-D) TV image. A fully nonlinear(adaptive) DPCM system based on a composite model of the image fragment is described. The description takes into consideration mutual influence of the prediction and quantization parts of the system. New results are presented concerning the probability density function... View full abstract»

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  • Reception of PSK Signals Over Fading Channels Via Quadrature Amplitude Estimation

    Publication Year: 1983, Page(s):1024 - 1027
    Cited by:  Papers (52)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    We consider here a new approach to PSK signal detection over a slow nonselective Rayleigh fading channel which does not require a carrier recovery loop. The receiver achieves coherent demodulation by making use of estimates of the quadrature amplitudes of the received PSK signals in its likelihood ratio test. The receiver is assumed to have a memory containing information on the past received sign... View full abstract»

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  • On the Capacity of Single-Hop Slotted ALOHA Networks for Various Traffic Matrices and Transmission Strategies

    Publication Year: 1983, Page(s):983 - 991
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB)

    In this paper we formulate a general model of the capacity of single-hop slotted ALOHA networks. We find that the capacity can be expressed as a function of the nodal degree (i.e., number of nodes within range of a transmitter). We than evaluate this model for various traffic matrices. In order to satisfy the requirements of a given traffic matrix, the transmission power is selected accordingly an... View full abstract»

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  • Scheduling in Multibeam Satellites with Interfering Zones

    Publication Year: 1983, Page(s):941 - 951
    Cited by:  Papers (19)  |  Patents (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1328 KB)

    In this paper we study the traffic scheduling problem in an SS/TDMA system with interfering beams. We investigate a twostep approach, the first step being the assignment of orthogonal polarization to reduce the interference, and the second step being the scheduling of traffic, taking into account the "resultant" interference. The first step we show can be solved in polynomial time in most cases, w... 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.

 

 

Full Aims & Scope

Meet Our Editors

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