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IEEE Transactions on Communication Technology

Issue 5  Part 1 • October 1971

 This issue contains several parts.Go to:  Part 2 

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

    Publication Year: 1971, Page(s): 0
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    Freely Available from IEEE
  • Editorial

    Publication Year: 1971, Page(s):741 - 742
    Cited by:  Papers (103)
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  • Block-Coding Techniques for Reliable Data Transmission

    Publication Year: 1971, Page(s):743 - 751
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (773 KB)

    Block coding has been in wide use in the errordetection and retransmission mode. It has also been used in some systems with a combination of forward error correction and retransmission techniques. In this paper, a brief survey and discription of those block-coding techniques is given that are likely to be useful in practical data transmission systems. View full abstract»

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  • Convolutional Codes and Their Performance in Communication Systems

    Publication Year: 1971, Page(s):751 - 772
    Cited by:  Papers (547)  |  Patents (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2234 KB)

    This tutorial paper begins with an elementary presentation of the fundamental properties and structure of convolutional codes and proceeds with the development of the maximum likelihood decoder. The powerful tool of generating function analysis is demonstrated to yield for arbitrary codes both the distance properties and upper bounds on the bit error probability for communication over any memoryle... View full abstract»

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  • Burst-Correcting Codes for the Classic Bursty Channel

    Publication Year: 1971, Page(s):772 - 781
    Cited by:  Papers (114)  |  Patents (35)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1222 KB)

    The purpose of this paper is to organize and clarify the work of the past decade on burst-correcting codes. Our method is, first, to define an idealized model, called the classic bursty channel, toward which most burst-correcting schemes are explicitly or implicitly aimed; next, to bound the best possible performance on this channel; and, finally, to exhibit classes of schemes which are asymptotic... View full abstract»

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  • Error Correction Code Performance on HF, Troposcatter, and Satellite Channels

    Publication Year: 1971, Page(s):781 - 789
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (823 KB)

    Four forward error correction techniques are examined and their performance compared on several real channels. Techniques of both adaptive and nonadaptive block and convolutional coding are examined. The Golay code is considered in a randomerror correcting mode and in an adaptive burst-random modes. Both versions employ interleaving as an added error correction aid. The adaptive convolutional code... View full abstract»

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  • Interleaved Block Coding Tests over VHF and HF Channels

    Publication Year: 1971, Page(s):790 - 801
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (888 KB)

    An operational one-way error correcting system has been constructed and tested at teleprinter speeds. The short onethird rate code was heavily interleaved and decoded using "minimum distance decocling," All system functions, including timing controls, were tested under single and dual diversity over 1300-km VHF and 1500-km HF paths, subject to a wide range of binary error rates. Test results showe... View full abstract»

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  • Estimating the Performance of Error-Correcting Codes on the HF Channel

    Publication Year: 1971, Page(s):802 - 806
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (527 KB)

    A simple procedure for evaluating the performance of various types of error-correcting codes is presented. First, the HF channel is modeled for error-rate calculations as a time-varying binary symmetric channel. Second, as an example of this procedure, the model is applied to data collected on a particular midtatitude HF channel with a 1200 bit/s frequency-shift keyed modem to determine the probab... View full abstract»

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  • Nonsystematic convolutional codes for sequential decoding in space applications

    Publication Year: 1971, Page(s):806 - 813
    Cited by:  Papers (45)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (886 KB)

    Previous space applications of sequential decoding have all employed convolutional codes of the systematic type where the information sequence itself is used as one of the encoded sequences. This paper describes a class of rate 1/2 nonsystematic convolutional codes with the following desirable properties: 1) an undetected decoding error probability verified by simulation to be much smaller than fo... View full abstract»

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  • A Flexible High-Speed Sequential Decoder for Deep Space Channels

    Publication Year: 1971, Page(s):813 - 820
    Cited by:  Papers (12)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (733 KB)

    This paper describes a sequential decoding machine built at the Jet Propulsion Laboratory (JPL), which uses a 3-bit quantization of the code symbols and achieves a computation rate of MHz. This machine is flexible and can be programmed to decode any complementary convolutional code with rates down to 1/4 and contraint lengths up to 32. In addition, metric programmability is provided for optimizati... View full abstract»

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  • A High-Speed Sequential Decoder: Prototype Design and Test

    Publication Year: 1971, Page(s):821 - 835
    Cited by:  Papers (24)  |  Patents (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1276 KB)

    We describe the design of a rate-1/2 hard-decision sequential decoder capable of operation at data rates up to 5 M bit/s. Test results are given for digitally generated errors, white noise, and real channels. The results are substantially in agreement with predictions of a coding gain of the order of 5 dB at a 10-5error rate. View full abstract»

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  • Viterbi Decoding for Satellite and Space Communication

    Publication Year: 1971, Page(s):835 - 848
    Cited by:  Papers (245)  |  Patents (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1291 KB)

    Convolutional coding and Viterbi decoding, along with binary phase-shift keyed modulation, is presented as an efficient system for reliable communication on power limited satellite and space channels. Performance results, obtained theoretically and through computer simulation, are given for optimum short constraint length codes for a range of code constraint lengths and code rates. System efficien... View full abstract»

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  • A New Coding Technique for Asynchronous Multiple Access Communication

    Publication Year: 1971, Page(s):849 - 855
    Cited by:  Papers (41)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (651 KB)

    A new approach to asynchronous multiple access communications is presented. The technique, employing orthogonal convolutional coding and Viterbi decoding, is described and its performance characteristics are derived for the case in which other-user interference is the only source of noise. Results indicate that the technique is quite efficient in terms of the number of users supportable at a speci... View full abstract»

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  • Two Recent Applications of Error-Correction Coding to Communications Systems Design

    Publication Year: 1971, Page(s):856 - 863
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (722 KB)

    This paper describes two communication systems in which convolutional coding with Viterbi maximum likelihood decoding plays a major role. The paper contains a functional description of the system, presents some of the thinking that contributed to the design, and gives some performance curves based on computer simulation and laboratory measurements. View full abstract»

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  • Design and Evaluation of a Generalized Burst-Trapping Error Control System

    Publication Year: 1971, Page(s):863 - 868
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (620 KB)

    An experimental error control system utilizing a generalized burst-trapping error control technique has been designed, built, and evaluated. Code parameters were chosen such that bursts as long as 1000 bits are likely to be corrected in the presence of a background random bit error rate as large as3 times 10^{-3}. In this paper we give a brief description of generalized burst-trapping c... View full abstract»

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  • [Back cover]

    Publication Year: 1971, Page(s): 0
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    Freely Available from IEEE

Aims & Scope

This Transactions ceased publication in 1971. The current retitled publication is  IEEE Transactions on Communications.

Full Aims & Scope