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IEEE Transactions on Communications

Issue 4 • Date April 1973

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Displaying Results 1 - 19 of 19
  • [Front cover and table of contents]

    Publication Year: 1973, Page(s): 0
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    Freely Available from IEEE
  • Recursive Image Enhancement - Vector Processing

    Publication Year: 1973, Page(s):305 - 311
    Cited by:  Papers (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (836 KB)

    A new approach to design of a recursive image enhancer is introduced when the image is characterized statistically by its mean and correlation function. A vector linear dynamical model is derived to represent the statistics of the processor output when several lines of the picture are processed simultaneously. Based on the vector model, a Kalman filter is designed and utilized to recursively enhan... View full abstract»

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  • [Back cover]

    Publication Year: 1973, Page(s): 0
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    Freely Available from IEEE
  • Acquisition of a Coded-Binary NCFSK Signal in a Multiple-Message One-Shot Transmission System

    Publication Year: 1973, Page(s):336 - 338
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    A statistical decision procedure for acquisition of a codedbinary noncoherent-frequency-shift-keyed (NCFSK) signal in a multiple-message one-shot transmission system is suggested. Performance of the system is also presented. View full abstract»

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  • A Technique of Modulating Pulsed Semiconductor Lasers

    Publication Year: 1973, Page(s):284 - 289
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    This paper gives details of the pulse-position modulation technique as applied in the case of a pulsed room-temperature-operated GaAs laser diode for communication purposes. The input analog signal is converted into a digital format and information transmission takes place through the laser pulses occurring at different positions in time. Special care is taken to synchronize the receiver with the ... View full abstract»

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  • The Satellite System as an Integrated Telecommunications Switching Center

    Publication Year: 1973, Page(s):317 - 321
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    Telecommunication satellites were first used as a means for establishing alternative transoceanic routes in competition with existing submarine cables. The use of advanced techniques in conjunction with the multitime-zone coverage makes it possible for transoceanic satellite systems to compete favorably with conventional intercontinental transmission means. This paper concerns itself with methods ... View full abstract»

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  • Optimum Tapped Delay Line for Digital Signals

    Publication Year: 1973, Page(s):277 - 283
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (712 KB)

    The problem of finding the optimum tapped delay line (TDL) gain settings for a digital communications receiver with a detection process involving a single threshold level (zero volts) is examined. Based on a minimax criterion which seeks to maximize the eye opening-to-rms noise ratio, an optimum set of tap gains is found with the aid of a geometric construction in View full abstract»

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  • Range Extension of a Phase-Locked Loop

    Publication Year: 1973, Page(s):293 - 296
    Cited by:  Papers (6)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    The capture capability of a type of hybrid-locked loop (HLL) in a noisy environment has been shown to be better than that of a conventional phase-locked loop (PLL). An approximate method of estimating the locking range and the locking time of the HLL in the noisy environment has been presented. Also given are the experimental results in partial support of the conclusions of the analysis. View full abstract»

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  • A Picture-Coding Algorithm for the Merli Scan

    Publication Year: 1973, Page(s):300 - 305
    Cited by:  Papers (1)  |  Patents (25)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB)

    A method is proposed and evaluated for coding a notched scan that jumps back and forth between adjacent scan lines of a normal raster. Alternate points in the line are coded using the normal differential quantizer algorithm while the remaining points use a nonlinear predictor proposed by Graham. The advantage of the algorithm over normal differential quantization is that the prediction strategy is... View full abstract»

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  • On the Performance of a Feedback Communication System Utilizing a Cumulative Decision Scheme

    Publication Year: 1973, Page(s):289 - 293
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    A cumulative decision scheme that can be employed in a feedback communication system is treated. Any decision to decode depends upon all messages that have been received prior to the decision. The average error over all transmissions as well as the forward error may be controlled. Performance is compared to an error-detection repeat-request noncumulative scheme utilizing group codes. Optimal perfo... View full abstract»

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  • Video-Signal Improvement Using Comb Filtering Techniques

    Publication Year: 1973, Page(s):331 - 336
    Cited by:  Papers (2)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (960 KB)

    Significant improvement in the signal-to-noise performance of television signals has been obtained through the application of comb filtering techniques. This improvement is achieved by removing the inherent redundancy in the television signal through linear prediction and by utilizing the unique noise-rejection characteristics of the receiver comb filter. Theoretical and experimental results descr... View full abstract»

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  • A Baseband Hybrid Digital Transmission Scheme

    Publication Year: 1973, Page(s):338 - 340
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    A baseband hybrid digital transmission scheme is studied, and it is shown that the low- and high-frequency cutoffs in analog repeaters extremely degrade signal waveforms. Solutions studied are a combination of dc-constrained coding and modification of amplitude-frequency characteristics for low-frequency distortion, and a combination of flat amplitude equalization and simple phase equalization for... View full abstract»

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  • Communications Satellites for Europe

    Publication Year: 1973, Page(s): 311
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB)

    First Page of the Article
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  • Attenuation and Cross-Polarization Measurements at 11 GHz

    Publication Year: 1973, Page(s):325 - 331
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    Measurements of linear cross polarization and attenuation on a terrestrial link in the U.K. are reported and correlated with rainfall information. The cross polarization measured during rainfall is compared with theoretically predicted values and monthly cross-polar statistics are presented for a 16-month period. View full abstract»

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  • Second-Order Phase-Lock-Loop Acquisition Time in the Presence of Narrow-Band Gaussian Noise

    Publication Year: 1973, Page(s):297 - 300
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    Phase-lock acquisition time of a perfect (proportional plus integral control) second-order phase-lock loop (PLL) in the presence of narrow-band Gaussian noise is studied by means of computer simulation. 100 nonoverlapping sequences of pseudorandom noise are generated. In the presence of each noise sequence, phase-lock acquisition is simulated at each of five pairs of initial phase error φ View full abstract»

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  • Communication Circuits: Analysis and Design

    Publication Year: 1973, Page(s): 341
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (112 KB)

    First Page of the Article
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  • No. 2 ESS Unigauge Range Extension

    Publication Year: 1973, Page(s):271 - 277
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (792 KB)

    Range extension allows the No. 2 electronic switching system (No. 2 ESS) to serve subscriber loops out to 2500 Ω as part of the Bell system's unigauge plan. Range-extender circuits provide both audio and dc gain for loops greater than 1300 Ω. These circuits have been designed specifically to be low cost, as small as possible, and to use minimum power. Network concentration allows 70 perc... View full abstract»

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  • System Considerations for European Communication Satellites

    Publication Year: 1973, Page(s):311 - 317
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    A regional communication satellite system is being planned for Europe to satisfy the future needs of the European Conference of Post and Telecommunication Administration (CEPT) and the European Broadcasting Union (EBU). A model of the mission for the satellite system, based on the estimated future traffic requirements of the potential customers, has been defined to serve as a basis for system desi... View full abstract»

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  • Computer Simulation of a Digital Satellite Communications Link

    Publication Year: 1973, Page(s):321 - 325
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    This paper describes a computer program for simulating 4phase digital transmission through a multitransponder satellite link. It takes account of intersymbol and adjacent channel interference and TWT nonlinearity. Results presented include the effects of different TWT characteristics, bit rates, and filter characteristics. 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