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Communications, IEEE Transactions on

Issue 7 • Date July 1974

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Displaying Results 1 - 17 of 17
  • [Front cover and table of contents]

    Publication Year: 1974 , Page(s): 0
    Save to Project icon | Request Permissions | PDF file iconPDF (154 KB)  
    Freely Available from IEEE
  • Editorial

    Publication Year: 1974 , Page(s): 889
    Cited by:  Papers (1)
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    Freely Available from IEEE
  • [Back cover]

    Publication Year: 1974 , Page(s): 0
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    Freely Available from IEEE
  • Linear Delta Modulator Integrated Circuit with 17-Mbit/s Sampling Rate

    Publication Year: 1974 , Page(s): 977 - 985
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (920 KB)  

    Delta modulation (DM) is an attractive method of analog-to-digital (A/D) conversion in applications where simple and economical designs must be realized without sacrificing conversion quality. This paper describes a new single-chip, bipolar integrated circuit delta modulator that maintains a high conversion resolution over a wide range of sampling frequencies and ambient conditions. Its high-speed... View full abstract»

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  • Digital DPCM Codec for TV Signals Based on \Delta M/DPCM Digital Conversions

    Publication Year: 1974 , Page(s): 970 - 976
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (632 KB)  

    A digital differential pulse-code modulation (DPCM) codec based on ΔM/DPCM and DPCM/ΔM digital conversions is presented as an equivalent replacement of a conventional DPCM codec for TV signals by using digital processing technology. A generalized model and equivalent circuit are shown for the digital DPCM codec, and transfer characteristics and quantizing noises are analyzed. The digital... View full abstract»

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  • Programmable Bandpass Filter and Tone Generator Using Bucket-Brigade Delay Lines

    Publication Year: 1974 , Page(s): 921 - 925
    Cited by:  Papers (12)  |  Patents (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (424 KB)  

    Bucket-brigade devices have been used to build a new type of active filter that is equivalent to a second-order digital filter without the need for complex analog-to-digital conversion. The filter response characteristics, i.e., center frequency and bandwidth, depend on the circuit parameters of gain and clock frequency, both of which may be electronically controlled. By using a variable clock sig... View full abstract»

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  • Statistical Properties of Timing Jitter in a PAM Timing Recovery Scheme

    Publication Year: 1974 , Page(s): 913 - 920
    Cited by:  Papers (92)  |  Patents (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (792 KB)  

    A new technique is presented for evaluating the performance of a popular type of timing recovery circuit for baseband synchronous pulse amplitude modulation (PAM) data signals. The timing circuit consists of a square-law device followed by a narrowband filter tuned to the pulse repetition frequency along with provision for reshaping the pulses entering the timing path (prefiltering). The output of... View full abstract»

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  • Design Technique for Vestigial-Sideband Filters

    Publication Year: 1974 , Page(s): 956 - 964
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (816 KB)  

    Symmetry conditions are derived for the amplitude and phase response of vestigial-sideband (VSB) filters. A design technique, based on Szentirmai's frequency transformation, is described for the realization of filters which automatically satisfy these symmetry relations. The synthesis can be carried out with either the s or the View full abstract»

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  • Designing Phase-Locked Oscillators for Synchronization

    Publication Year: 1974 , Page(s): 890 - 896
    Cited by:  Papers (2)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (576 KB)  

    Phase-locked oscillators (PLO's) have two main areas of application: demodulation and synchronization. In this tutorial paper, a simplified approach to designing PLO's for synchronization is described. In particular, some tradeoffs which can be made between such characteristics as capture range, jitter attenuation, time to lock, and phase offset are presented. As examples of this approach, the met... View full abstract»

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  • Some Special Design Considerations for a Mechanical Filter Channel Bank

    Publication Year: 1974 , Page(s): 935 - 940
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (672 KB)  

    The technical concept realized by the channel bank is optimum with respect to a variety of requirements. Considerations of size and fabrication technology recommend a frequency of 50 kHz for the mechanical filter. The general concept of the modulator suggests a filter design with tuned conventional transformers. Since subsequent adjustment of the assembled mechanical part of the filter is undesira... View full abstract»

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  • Bucket-Brigade Transversal Filters

    Publication Year: 1974 , Page(s): 926 - 934
    Cited by:  Papers (12)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (976 KB)  

    The bucket-brigade delay line (BBDL) is a sampled data circuit in which signal samples are stored and manipulated as packets of charge under the control of a digitally generated clock. The clock-controllable time delay function that is realized by the BBDL may be used to implement a number of signal processing functions. The tapped delay line or transversal filter structure is of particular intere... View full abstract»

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  • IF Variable Equalizers for FM Microwave Radio Links

    Publication Year: 1974 , Page(s): 941 - 951
    Cited by:  Patents (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (992 KB)  

    The circuit configuration, operational principles, and some test data on three new types of equalizers applicable for use in FM microwave radio links are described. The equalizers are namely of the reflection type, frequency converter type, and AM-PM conversion type. The reflection type delay equalizer permits variation of relative delay time while keeping the absolute delay time constant at the c... View full abstract»

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  • Active Adjustable Loss and Delay Equalizers

    Publication Year: 1974 , Page(s): 951 - 955
    Cited by:  Papers (1)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (568 KB)  

    The design of active amplitude and delay equalizers to be used in private line data systems is considered. These equalizers provide sufficient flexibility of adjustment so that one type of amplitude equalizer and one type of delay equalizer are sufficient for all applications. They replace families of passive equalizers which permitted relatively limited or no adjustment. View full abstract»

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  • Carrier Phase Recovery Scheme for a Low-Frequency Vestigial Sideband Video Transmission System

    Publication Year: 1974 , Page(s): 897 - 903
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (576 KB)  

    A vestigial sideband system seems attractive for transmitting video signals over media of limited bandwidth. Linearity constraints in the unavoidable intermediate equalizers (repeaters) limit the level of the transmitted carrier to such an extent that envelope detection is precluded. In a proposed video system the transmitted signal includes a partially suppressed carrier and an out-of-band pilot ... View full abstract»

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  • Design of Digital Notch Filters

    Publication Year: 1974 , Page(s): 964 - 970
    Cited by:  Papers (14)  |  Patents (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (592 KB)  

    It is shown that a second-order digital notch filter is uniquely characterized by two distinct parameters, the notch frequency and the 3-dB rejection bandwidth. As a result, such a filter can be realized using only two multipliers. Methods are outlined to design a notch filter for a prescribed notch frequency and a prescribed 3-dB rejection bandwidth, along with procedures for postdesign adjustmen... View full abstract»

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  • Thin-Film Auto-Balance Diode Gate for Voice-Band Sample and Hold and Resampler Circuits

    Publication Year: 1974 , Page(s): 986 - 994
    Cited by:  Patents (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (856 KB)  

    A thin-film hybrid integrated circuit autobalanced diode transmission gate used in a voice-band pulse-code modulation (PCM) terminal will be described. The gate circuit is designed for sample and hold and resampler operations prior to digitalization and after decoding. As in the sampling circuits previously designed for an experimental high-speed high-performance PCM terminal, the diode quad gate ... View full abstract»

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  • PAM Pulse Generation Using Binary Transversal Filters

    Publication Year: 1974 , Page(s): 904 - 913
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (968 KB)  

    Modern narrow-band pulse-amplitude modulation (PAM) and pulse-code modulation (PCM) systems require the generation of precisely shaped pulses in order to avoid intersymbol interference. It is not a simple matter to design analog filters having pulse responses with the requisite carefully positioned zeros, and this has led researchers to study other approaches. It is shown that the use of a binary ... 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
Robert Schober
University of British Columbia