IEEE Transactions on Communications

Issue 2 • February 1976

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Displaying Results 1 - 23 of 23
  • [Front cover and table of contents]

    Publication Year: 1976, Page(s): 0
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    Freely Available from IEEE
  • Editorial

    Publication Year: 1976, Page(s): 153
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    Freely Available from IEEE
  • Chaining in a Loop System

    Publication Year: 1976, Page(s):203 - 210
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (733 KB)

    This paper offers an approximate analysis of the chaining operation in a loop system. The system consists of a central processor andNterminals linked by a common communication channel. Chaining refers to the service protocol whereby the channel is assigned in sequence to each of the terminals. Messages from terminals to the central processor are sent as chains of segments. The object of... View full abstract»

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  • Correction to "Short Constraint Length Rate 1/2 ́Quick-Looḱ Codes"

    Publication Year: 1976, Page(s): 286
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (66 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
  • The Performance of Quantizers for a Class of Noise-Corrupted Signal Sources

    Publication Year: 1976, Page(s):184 - 189
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (568 KB)

    An investigation is made of the performance of quantizers used as source encoders for noise-corrupted signal sources. The developmerit is pertinent to discrete-time, memoryless, signal-signal-sourse-independent noise sources with a given amplitude bound. A functional analysis approach is adopted to formulate the problem and derive the results. The derivations and intermediate results are in terms ... View full abstract»

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  • Stored Channel Simulation of Tactical VHF Radio Links

    Publication Year: 1976, Page(s):154 - 163
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1088 KB)

    This paper discusses the theory and design of a tactical channel simulator (TCS) built to simulate land-mobile VHF radio links. The instrument is one of the first such units based on the stored channel principle, which permits the actual medium to be recorded and played back. The key application of the TCS simulator is to realistically reproduce field conditions in a laboratory. Tests on the TCS s... View full abstract»

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  • New Technique for Generating and Detecting Multilevel Signal Formats

    Publication Year: 1976, Page(s):263 - 267
    Cited by:  Papers (22)  |  Patents (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    A new modem circuit technique is proposed for multilevel signal transmission to utilize frequency bandwidth efficiently in high-speed digital carrier transmission systems. With this technique a multilevel amplitude and phase-keying (APK) signal is generated as the sum of the outputs of two multiphase modulators and is detected by tandem phase demodulators. This "superposed modem has a simple circu... View full abstract»

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  • Study and Fabrication of a Frequency Divider-Multiplier Scheme for High-Efficiency Microwave Power

    Publication Year: 1976, Page(s):243 - 249
    Cited by:  Papers (17)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    The design, fabrication, and experimental evaluation of an exploratory 8.2 W, microwave FM power amplifier for the 4-GHz band are presented. It operates on a frequency divide, amplify, and multiply scheme receiving about 2-4 dBm of FM signal in the 4-GHz band, divides the frequency coherently by two, amplifies the modulated signal to about 10.4 W, and doubles the frequency coherently, yielding abo... View full abstract»

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  • Linear Detection in a Poisson Regime with Random Pulse Heights

    Publication Year: 1976, Page(s):254 - 259
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    The detection of light signals using photomultipliers is presented in terms of an idealized model in which the received signal consists of a series of pulses of random height with arrival times that are Poisson distributed with an instantaneous rate proportional to transmitted signal intensity. Linear detection, effected through multiplication by locally generated functions followed by integration... View full abstract»

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  • An Efficient Parity Checking Scheme for Random and Burst Errors

    Publication Year: 1976, Page(s):249 - 254
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (536 KB)

    In this concise paper we describe an efficient scheme for random and burst error checking by a combination of serial parity checking and convolutional interleaving. The framing for interleaved blocks is shown possible by a simple implementation, and the error detection capability is better than other schemes similar in complexity. The proposed scheme has useful applications for digital transmissio... View full abstract»

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  • Computation of Interference into Angle-Modulated Systems Carrying Multichannel Telephone Signals

    Publication Year: 1976, Page(s):259 - 263
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    It is commonly known that, in order to calculate the demodulated noise power of the wanted frequency division multiplexedfrequency modulated (FDM-FM) signal due to interference, the convolution between the power spectra of the wanted FM signal and interference is required to be obtained. This concise paper shows a simple approach to calculate this convolution without direct calculation of the powe... View full abstract»

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  • Nonadaptive DPCM Transmission of Monochrome Pictures Over Noisy Communication Channels

    Publication Year: 1976, Page(s):173 - 183
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1360 KB)

    The present study is a sequel to the authors' 1972 paper [1] where the output signal-to-noise ratio SNRois obtained for nonadaptive differential pulse-code modulation (DPCM) systems with an arbitrary linear predictor operating on noisy digital channels. Important stability constraints for an arbitrary linear predictor are obtained. A complete analytical study of previous line-line-and-s... View full abstract»

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  • Single-Message Communication

    Publication Year: 1976, Page(s):190 - 194
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (536 KB)

    When a communication system is used to transmit many short messages, it is important to reduce the amount of control overhead for creation and destruction of logical process-to-process connections and for reliable communication. Different end-to-end control procedures are described, and they are studied with respect to the possibility of losing a message or accepting a duplicate. It is shown (unde... View full abstract»

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  • Mutual Impedances for Parallel Wires Over a Two-Layer Earth

    Publication Year: 1976, Page(s):222 - 230
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    J. R. Wait developed an analytical formulation for the fields of an infinite line source above a stratified earth which can be extended to include any number of layers. This formulation is numerically evaluated using Filon's method to give results on the mutual impedance between two long conductors above a stratified earth. To demonstrate the usefulness of this formulation, numerical results are c... View full abstract»

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  • Power Control Algorithms for Satellite Communication Systems

    Publication Year: 1976, Page(s):267 - 275
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1136 KB)

    Three different ground terminal transmit power control concepts for a Satcom system are examined. The effectiveness of constant satellite power (CSP) sharing among the carriers and adaptive satellite power (ASP) sharing is compared with constant ground terminal transmit power (CTP). It is shown that ASP offers substantial advantages over CSP in combating environmental degradations and that both ca... View full abstract»

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  • Maximum Likelihood Receiver for Multiple Channel Transmission Systems

    Publication Year: 1976, Page(s):276 - 283
    Cited by:  Papers (153)  |  Patents (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (568 KB)

    A maximum likelihood (ML) estimator for digital sequences disturbed by Gaussian noise, intersymbol interference (ISI) and interchannel interference (ICI) is derived. It is shown that the sampled outputs of the multiple matched filter (MMF) form a set of sufficient statistics for estimating the input vector sequence. Two ML vector sequence estimation algorithms are presented. One makes use of the s... View full abstract»

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  • Power Spectra of Sinusoidal Amplitude-Modulated Binary Signals

    Publication Year: 1976, Page(s):284 - 286
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    Power spectra for binary phase-shift keyed (PSK) and frequency-shift keyed (FSK) signals with combined sinusoidal amplitude modulation by the bit rate clock are presented. Such signal formats have application in "burst" communication systems wherein reliable bit synchronization is provided with relative receiver simplicity. Effects of the clock amplitude modulation index and phase are considered, ... View full abstract»

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  • A Model for Evaluating the Performance of an Integrated Circuit- and Packet-Switched Multiplex Structure

    Publication Year: 1976, Page(s):195 - 202
    Cited by:  Papers (66)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (680 KB)

    Recent papers have introduced a multiplexing structure for mixing voice and data traffic in an integrated telecommunications system. This structure utilizes a master frame format of a time division statistical multiplex facility. A certain portion of the frame is allocated to voice calls, and data traffic is assigned to the remaining frame capacity. To achieve a high transmission utilization, data... View full abstract»

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  • A New Translation Procedure for the C-60M System

    Publication Year: 1976, Page(s):230 - 238
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB)

    This paper proposes a new translation procedure which is based on a jumbogroup constitution for simultaneous multiplex transmission of telephone and videophone signals over a coaxial 60-MHz system and describes transmission characteristics of the C-60M system using the translation procedure. The translation procedure reduces group-delay distortion harmful to video transmission without changing tel... View full abstract»

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  • Thermal Heating Contribution to Intermodulation Fields in Coaxial Waveguides

    Publication Year: 1976, Page(s):238 - 243
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (584 KB)

    We investigate intermodulation (IM) production due to the thermal heating of coaxial waveguide walls. Two impressed signals are assumed to propagate in a coaxial cable in the TEM mode. The resulting power developed in the IM product is found to depend upon the thermal coefficient of the electrical conductivity of the metal squared, and is inversely proportional to the conductivity itself. View full abstract»

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  • Digital Signal Design Concepts for a Time-Varying Rician Channel

    Publication Year: 1976, Page(s):164 - 172
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (752 KB)

    The problem of transmitting digital data reliably over a Rician channel, which is used to model the aircraft-satellite link, is treated by an integrated coding and modulation design approach. The results presented enable one to show that it is quite possible to achieve robust signaling which is fairly insensitive to the channel's surface scatter parameters, such as scatter path energy and Doppler ... View full abstract»

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  • An Approximate Time-Delay Analysis for Packet-Switching Communication Networks

    Publication Year: 1976, Page(s):210 - 222
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1104 KB)

    A technique is presented for the derivation of approximate average packet time-delay formulas in a packet-switching store-and-forward network. The approximation technique appropriately incorporates arrival and departure packet interferences with the recent queueing results in a noninterfered communication path. Simulation results, for basic flow configurations, show the approximate timedelay funct... 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