IEEE International Conference on Communications, Including Supercomm Technical Sessions

16-19 April 19906

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  • IEEE International Conference on Communications ICC '90 Including Supercomm Technical Sessions. SUPERCOMM ICC '90 Conference Record (Cat. No.90CH2829-0)

    Publication Year: 1990
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    Freely Available from IEEE
  • The impact of evolving telecommunications technology on radio spectrum utilization

    Publication Year: 1990
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    Summary form only given. Presents a broad cross section of participating engineers from organizations involved in the coordination, design, and operation of radio systems. Present-day digital switching and multiplex techniques have shifted the emphasis from analog radio and metallic cable to digital radio and fiber-optic cable. The radio industry was once dominated by long-haul designs in 4- and 6... View full abstract»

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  • Technology for millimetre wave systems

    Publication Year: 1990
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    Summary form only given. The use of the millimeter-wave spectrum above 30 GHz for telecommunications offers considerable bandwidth for broadband services, but power limitations and rain attenuation constrain its prospects to small 'cell' or short-hop systems. Nevertheless, given suitable low-cost 'consumer' technology, there is considerable attraction for local access and interconnect services whe... View full abstract»

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  • Shifting demands for radio spectrum

    Publication Year: 1990
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    Summary form only given. The past decade has signaled fundamental new trends in the use of radio spectrum. The trends relate to telecommunications market drivers, as well as technological developments. The market drivers include increasing demands for data transmission, higher capacity facilities, flexibility, and greater personal control of communications. Technological responses to these demands... View full abstract»

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  • Network planning for the 1990s

    Publication Year: 1990
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    Summary form only given, as follows. The deregulation of the US telecommunications industry has resulted in increased use of the electromagnetic spectrum. Although fiber-optics transmission uses segment of this spectrum, the microwave frequency bands from 1.0 to 20.0 GHz have encountered increased usage as additional capacity requirements arise. With this increased usage by industry, the spectrum ... View full abstract»

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  • Capacity/modulation tradeoffs in going from 64 QAM to 256 QAM

    Publication Year: 1990
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    Summary form only given. Increasing the modulation complexity permits significant improvements in bandwidth efficiency. However, the higher level modulation schemes must include additional countermeasures to minimize increased susceptibility to dispersion, loss of threshold, further transmitter power backoff, and increased interference susceptibility.<> View full abstract»

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  • The impact of emerging cellular technologies on radio spectrum utilization in the 1990s

    Publication Year: 1990
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    Summary form only given. Many new potentially spectral efficiency technologies have emerged recently, e.g. digital cellular radio, linear radio channels, microcellular technology, and low-bit-rate speech encoding. The author examines the characteristics of these emerging cellular technologies, particularly in terms of spectrum utilization, cost, and availability. He also examines the potential gai... View full abstract»

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  • Increased complexities of frequency coordination due to telecommunications advances

    Publication Year: 1990
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    Summary form only given. Changes in the telecommunications industry in recent years have produced a major impact on the utilization of the radio spectrum. First, the regulatory changes of the seventies opened telecommunications to a wide array of companies, and whole new industries began to put tremendous pressure on the available radio spectrum. Next, technological advances that were made in resp... View full abstract»

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  • Problems in telecommunication development and application of modern information technology in the USSR

    Publication Year: 1990
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    Summary form only given. The problems of creating new means of telecommunication and the application of modern information technology in the USSR are addressed. Some specific features of communications technology development in the USSR are outlined. It is concluded that the process of integrating communication equipment and computers should lead to the creation of an entire digital switching and ... View full abstract»

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  • Optical fibre transmission system equipment in the USSR

    Publication Year: 1990
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    Summary form only given. The development of the communication network in the USSR is largely provided by installation of urban and long-distance optical fiber communication lines. Equipment that allows bit rates of 8, 34, and 140 Mb/s in data transmission over graded-index and single-mode fiber-optic cables at 1.3- mu m wavelength is designed and manufactured. Equipment for transmission of digital... View full abstract»

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  • Professional communication in the USSR

    Publication Year: 1990
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    Summary form only given. Aspects of the Soviet state system of scientific-technical information, i.e. professional communication, are discussed, and the problems of setting up and developing an automatic center network are considered. The methods and forms of information services and the information-logic analysis of knowledge and processing in the USSR are discussed. Also considered are the probl... View full abstract»

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  • Optical transmitters and receivers for fast optoelectronics

    Publication Year: 1990
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    Summary form only given. The increasing bit rate of optical communication systems and the possibility of developing very fast optoelectronic functional elements have stimulated intensive investigations of the dynamic properties of semiconductor lasers (SLs) and fast photodiodes. The influence of optical feedback on the spectral and noise properties of different kinds of SLs, including distributed-... View full abstract»

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  • High-power quantum-well InGaAsP/InP lasers and their coupling with the optical fibers

    Publication Year: 1990
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    Summary form only given. An investigation of high-power broad-stripe lasers and the possibility of their effective coupling with multimode optical fiber was carried out. Laser wafers were grown by a modified LPE (liquid-phase-epitaxy) growth technique utilizing short-term active layer deposition on a moving substrate. Optical fibers with central core diameters of 50, 100, and 200 mu m and NALFA of... View full abstract»

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  • Travelling-wave integrated-optical modulator with spread frequency response

    Publication Year: 1990
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    Summary form only given. The authors fabricated planar electrode structures for travelling-wave integrated optical modulators which allow the spread of the FR (frequency response) and simultaneous decrease of drive power in a fixed-frequency band. This is achieved by a smooth change of value and sign or electrooptical interaction according to the appropriate functional dependence, which, in the ab... View full abstract»

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  • Automatic routing of integrated circuit connections: a tutorial

    Publication Year: 1990, Page(s):801 - 805 vol.3
    Cited by:  Patents (2)
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    An introduction to automatic integrated-circuit routing is presented. Particular attention is given to the types of routing algorithm, global and detailed routing, and improving routing and routability.<> View full abstract»

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  • On optimal self-orthogonal quasi-cyclic codes

    Publication Year: 1990, Page(s):1256 - 1260 vol.3
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    Some infinite classes of optimal self-orthogonal quasi-cycle (SOQC) equal/unequal error protection codes are presented. These codes are specified by corresponding block designs. Several optimal SOQC codes which were not found by Townsend and Weldon (1967) are also given. From the point of view of implementation, the systematic form of the code has some important advantages. Because of the quasi-cy... View full abstract»

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  • FDM packet multiple access network using coherent fibre optic communication

    Publication Year: 1990, Page(s):1648 - 1652 vol.4
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (320 KB)

    The authors present the design of a fiber-optic packet multiple-access network which employs coherent detection over FDM optical channels. The network consists of a single-mode optical fiber arranged in the D configuration and clusters of stations attached via passive taps to the transmit and receive arms. Each station cluster is assigned one dedicated FDM channel for packet reception, and each st... View full abstract»

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  • The ALEX service-a technical overview

    Publication Year: 1990, Page(s):1643 - 1647
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    Bell Canada's new interactive communications service provides customers with a wide range of electronic information and transaction applications. The author presents a technical overview of the ALEX network architecture and service standard that led to the successful introduction of the service. The key implementation decisions made for developing an easy-to-use service targeted at the general pub... View full abstract»

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  • Residential ISDN services: information service architecture

    Publication Year: 1990, Page(s):1637 - 1642 vol.4
    Cited by:  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (524 KB)

    AT AT&T 5ESS switch-based residential ISDN information service architecture is described. The 5ESS switch ISDN application processor interface architecture with an ISDN telemetry cut-line protection example is described. The end-to-end data network alternatives for providing communication links between ISDN residential users and enhanced service providers are discussed. It is noted that one ke... View full abstract»

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  • Security evaluation of a new analog speech scrambling device using a nonlinear DES-based keystream generator

    Publication Year: 1990, Page(s):1534 - 1539 vol.4
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (660 KB)

    A novel nonlinear data-encryption-standard-based keystream generator algorithm, which provides eight very long random and mutually independent keystreams, is used to operate a speech-scrambling algorithm which processes the analog signal in the two dimensions of time and frequency, and uses a preamplifier to synchronize the operation of the receiver with that of the transmitter. Both the scramblin... View full abstract»

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  • Stored program controlled telecommunication services

    Publication Year: 1990, Page(s):1632 - 1636 vol.4
    Cited by:  Patents (3)
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    The author highlights some basic concepts developed under the Research and Development in Advanced Communications Technologies in Europe program that could be instrumental in providing future stored-program-controlled telecommunication services. The necessity of defining the instruction set for the stored program-controlled general-purpose telecommunication system is pointed out. The instruction s... View full abstract»

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  • Error and throughput performance of multidecoded erasure-based direct sequence/time hopping selection diversity multiaccess systems

    Publication Year: 1990, Page(s):1527 - 1533 vol.4
    Cited by:  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (536 KB)

    A new direct-sequence/time-hopping spread-spectrum system is intended to increase the multiaccess efficiency by employing time diversity and a multidecoding-erasure-error forward error correction scheme. Reed-Solomon is the basic code employed, and an algorithmic demodulation rule is used in conjunction with a modified majority vote among the outputs of many decoders finally to yield a superior er... View full abstract»

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  • ISDN applications deployment via prototyping

    Publication Year: 1990, Page(s):1627 - 1631 vol.4
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    New ISDN automatic call distributor features have been demonstrated via a prototyping approach. The author demonstrates how a prototype can be used to uncover technical issues and identify an unfamiliar application. She shows how it gives an early evaluation of the practicality of the system/design and, hence, an evaluation of some business decision operations View full abstract»

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  • Network evolution and the intelligent network (IN)

    Publication Year: 1990, Page(s):192 - 196 vol.1
    Cited by:  Patents (1)
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    The authors analyze the functions of network intelligence and examine a practical implementation method. In this method, the intelligent network serves three functions: providing a common database, separating service logic from switching logic, and providing customer programmability. Each of the categories is realized individually View full abstract»

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  • Analysis of self-noise in clock recovery using arbitrary nonlinearity

    Publication Year: 1990, Page(s):1522 - 1526 vol.4
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (276 KB)

    The author describes an analytical method by which the in-phase and quadrature spectra of self-noise in a clock recovery circuit using arbitrary nonlinearity can be computed. The analytical results are confirmed by simulation using a time-truncated Nyquist pulse having a raised-cosine rolloff. In contrast to previous work which computed the spectra of discretized output of the nonlinearity operato... View full abstract»

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