By Topic

Communication Technology, IEEE Transactions on

Issue 6 • Date December 1967

Filter Results

Displaying Results 1 - 25 of 28
  • [Front cover and table of contents]

    Publication Year: 1967 , Page(s): 0
    Save to Project icon | Request Permissions | PDF file iconPDF (179 KB)  
    Freely Available from IEEE
  • Reliability field experience in electronic switching systems

    Publication Year: 1967 , Page(s): 729
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (123 KB)  

    Electronic switching systems have progressed through the experimental trial stages and a number of systems are now in regular commercial use. The reliability experienced in these field installations wiII be discussed by authors representing four different companies - one English, one German, and two American. Reliability and maintenance data from several operating systems will be used to demonstra... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Field experience with quasi-electronic telephone switching systems

    Publication Year: 1967 , Page(s): 730 - 735
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (784 KB)  

    The combination of electronic components and dryreed contacts for use in switching systems has proved its high reliability standard. For several years, various types of equipment, e. g., routing translators, switching arrangements for direct distance dialing plant and local telephone offices have been in continuous operation in the public network. Component reliability figures, gained from these d... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Reliabilty and Field Experience of Electronic Switching Systems

    Publication Year: 1967 , Page(s): 736 - 743
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (728 KB)  

    Field experience of electronic switching systems is compared with design objectives expressed in reliability and maintainability parameters, applied from the start of design, for the purpose of meeting stringent customer requirements. A feedback system of field performance was established, reliability analysis was performed, and the results were applied to a reliability model to determine to what ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Early No. 1 ESS Field Experiences: I--Two-Wire System for Commercial Applications

    Publication Year: 1967 , Page(s): 744 - 750
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (835 KB)  

    The No. 1 Electronic Switching System (ESS) is the first electronic machine produced in quantity by the Bell System for central office switching. A 2-wire version is being used for Bell System commercial customers and a 4-wire version for a variety of government and military applications. The system is composed largely of solid-state devices and is controlled by a stored program. The nine No. 1 ES... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Early No. 1 ESS Field Experiences: II - Four-Wire System for Government and Military Applications

    Publication Year: 1967 , Page(s): 751 - 754
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (445 KB)  

    Late in 1962 Bell Telephone Laboratories began the development of a 4-wire version of the No.1 ESS for government and military applications. An electronic stored program system was requested by the government to meet the growing needs of defense communication. There are now thirteen 4-wire No.1 ESSs in the government's AUTOVON network, in addition to 23 No. 5 crossbar offices, most placed in servi... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Electronic Reliability in the Field

    Publication Year: 1967 , Page(s): 755 - 767
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1457 KB)  

    Over nearly a decade the British Post Office has been operating normal production electronic equipment for the control and routing of calls through the long distance switching network. More recently the first normal production installation of a fully electronically controlled exchange has been cut into service and is the beginning of a regular program for the installation of such exchanges through... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Partitioned Switching Arrays

    Publication Year: 1967 , Page(s): 768 - 777
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1008 KB)  

    Known switching arrays service subscribers in either a blocking or a totally nonblocking manner. The first part of this paper describes a method of modifying totally nonblocking arrays to service a group of subscribers, some of which will be given nonblocking service while the rest will be given service at a prescribed blocking probability. It is shown that the resultant crosspoint saving compared... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Vulnerability of Communication Networks

    Publication Year: 1967 , Page(s): 778 - 789
    Cited by:  Papers (12)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1213 KB)  

    A communication system can often be represented as an interconnection of stations and links. The assumption is that the system is subject to enemy attack aimed at isolating stations from each other. Vulnerability criteria are defined, and asymptotic and recurrence relations are given for computing the vulnerability of several classes of networks with a large number of stations. Based on the analys... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Maximal-Ratio Diversity Combiners

    Publication Year: 1967 , Page(s): 790 - 797
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (816 KB)  

    A diversity combiner with a structure which is common to many communication systems is described. When the combiner inputs are independent and identically distributed narrowband Gaussian random processes and the reference signals are timeinvariant, it is found that the combiner output can be conveniently represented as a function of a Gaussian random process, a chisquare variate, Gaussian variate,... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Error Probability for Multipath Fading--The "Slow and Flat" Idealization

    Publication Year: 1967 , Page(s): 797 - 805
    Cited by:  Papers (12)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (871 KB)  

    The ideal slow and flat fading model, consisting of any number of multipaths, is revisited. In this model the assignment of specular and scatter components is arbitrary. The additive disturbance need not be Gaussian noise, certain random distortions in the receiver are permitted, and the digital system and the modems are not restricted. Under these assumptions alternative error probability relatio... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Performance of an Efficient Parallel Data Transmission System

    Publication Year: 1967 , Page(s): 805 - 811
    Cited by:  Papers (239)  |  Patents (48)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (658 KB)  

    A parallel quadrature AM data transmission system may be implemented with a number of overlapping channels, each carrying a signaling rate b , spaced b/2 apart in frequency. When a large number of channels are used, the system allows transmission speeds very close to the Nyquist rate, with little sensitivity to delay an... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The TOUCH-TONE® Telephone--Transmission of Digital Information ®

    Publication Year: 1967 , Page(s): 812 - 824
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1380 KB)  

    A discussion of the Bell System TOUCH-TONE®dialing system when it is alternatively used in data applications is presented. The particular aspects of this service and the hardware involved which lend themselves to alternate data uses are discussed in detail. Among the points covered are coding, the keyboard, error possibilities, and the technical aspects of the receiving data set. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Visual Sensor Systems in Space

    Publication Year: 1967 , Page(s): 824 - 834
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1094 KB)  

    Slow-scan television cameras have been used as visual scanners in orbiting satellite programs. The sensor, as an input device, and the associated readout or output device are the terminal parts of an orbiting television satellite system. Some of the input-output elements will be described covering visual sensors, optics, kinescope recording, and facsimile. Sample systems, such as TIROS and Essa sa... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Variable Redundancy Product Codes

    Publication Year: 1967 , Page(s): 835 - 838
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (432 KB)  

    The tensor product codes, as either iterated codes or error-locating codes, possess the property of variable redundancy (allowing up to eight different levels of error control). It is shown that the implementation of an encoder for such codes can be decomposed into the implementation of the component codes. The selection of eight encoder modes yields four iterated codes and four error-locating cod... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Design Concepts for Transportable Ionoscatter Systems and Experimental Results

    Publication Year: 1967 , Page(s): 839 - 847
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1031 KB)  

    An experimental ionoscatter system carrying four 50-baud telegraph circuits has been designed and tested at 36 MHz over a distance of 1000 km between the Netherlands and Southern France. The object was to demonstrate the possibility of designing a system sufficiently compact to be made transportable. By using multiple-diversity reception and automatic request (ARQ) equipment, it has been possible ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The Raisting Satellite Earth Station and Its System Noise Temperature

    Publication Year: 1967 , Page(s): 848 - 854
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (856 KB)  

    Features of the German satellite earth station at Raisting are cited in this paper. One essential criterion, the noise performance, is discussed in particular. The 25-meter Cassegrain antenna with horn reflector feed (covered by a radome) has been subjected to extended measurements of the system noise temperature. The results show the relation between the system noise temperature and the antenna e... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Designing an Automated Oceanographic Buoy Interrogation System Using HF Radio

    Publication Year: 1967 , Page(s): 855 - 860
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (662 KB)  

    Automatic interrogation and readout of a worldwide system of over 300 meteorological/oceanographic buoys requires careful attention to system control and communication interfaces. This paper describes the design of a system in which operation is executed by a medium-size digital computer which serves to control interrogation of the buoys, format the received digital transmissions, and put them on ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Correction - "Data communication through the atmospheric burst error channel"

    Publication Year: 1967 , Page(s): 860
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (136 KB)  

    Summary form only given, as follows. The author of the above-named paper (19TP67-933), which appeared on pp. 383-389 of the June, 1967, issue of this Transactions, has called the following to the attention of the Editor: The factor 2/3 should not appear in expressions (11) and (28). View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Performance of Random Error Correcting Codes on the Switched Telephone Network

    Publication Year: 1967 , Page(s): 861 - 864
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (452 KB)  

    The performance of perfect codes on the switched telephone network is evaluated in terms of output block error and output bit error probability. By evaluating these codes against experimental data describing the switched telephone network, it is shown that significant improvement in the block error rate is possible, but that only negligible improvement in the bit error rate is obtained even with b... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Experimental Verification of a Model of the Oscillating Limiter

    Publication Year: 1967 , Page(s): 865 - 867
    Cited by:  Papers (1)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (285 KB)  

    Work done to verify the results of an analysis of the oscillating limiter published previously is reported upon in this paper. To this purpose experiments were made with an oscillating limiter, the characteristics of which are given, to check the nonlinear distortion produced on the baseband signals. The baseband equivalent circuit and nonlocking behavior of the oscillating limiter were also teste... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The Quatrix--A Proposed Electrooptical Position or Angle Sensor

    Publication Year: 1967 , Page(s): 867 - 868
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (255 KB)  

    This technique, called quatrix (for quasi-matrix), has potential application in numerous communication and datahandling areas, since it provides high-density matrix-photocell capability at much lower cost. The method uses a few photographically-produced precision coding masks fitted over an equal number ( N ) of photocells. Thus, ten ( View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Transposed Sideband Modulation for Data Transmission

    Publication Year: 1967 , Page(s): 868 - 870
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (373 KB)  

    Transposed sideband modulation is a method for frequency multiplex transmission of digital voice band signals. Its significant feature is that no sharp cutoffs are required for the single sideband filters so that amplitude and phase distortions can be kept very low. Since transposed sideband modulation retains the CCITT channel subdivision, it is compatible with existing single sideband voice carr... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Experimental Optical Links

    Publication Year: 1967 , Page(s): 870 - 871
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (303 KB)  

    The design and performance of two experimental, optical links, tailored specifically to interconnect two high-speed tape units, are described. Both links, a full duplex digital link and a full duplex AM/FSK link, are presented in necessary detail. Laboratory experiments have shown that 33-Mbaud operation is feasible. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Least Squares Procedure for Aligning Antennas

    Publication Year: 1967 , Page(s): 872 - 874
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (321 KB)  

    A procedure is described for aligning transmitting and receiving antennas in a communications link with a minimum number of positionings of the antennas. A statistical formalization of the interpretation of the received signal levels permits that combination of receiving and transmitting antenna orientations to be chosen which most probably represents the aligned combination. A criterion is also d... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

Aims & Scope

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

Full Aims & Scope