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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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  • Low-cost digital passive optical networks

    Publication Year: 1990, Page(s):659 - 662 vol.2
    Cited by:  Papers (1)  |  Patents (41)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    Techniques for reducing the cost of providing digital telephony and broadband services to the home over passive optical networks are proposed. These include the use of optical transceivers in an optical TDMA (time-division multiple access) telephony system and using low-cost consumer technology in providing a digital CATV (cable television) service using TDM (time division multiplexing) View full abstract»

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  • The design of a TDMA system for passive optical networks

    Publication Year: 1990, Page(s):654 - 658 vol.2
    Cited by:  Papers (2)  |  Patents (35)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    The authors describe the design methodology and implementation details of a time-division multiple access (TDMA) system which has been developed to allow point to multipoint operation of passive optical networks. This TDMA bit transport system transparently handles the multiplexing and control functions required for passive splitting optical networks. The system is generic and, with relatively sim... View full abstract»

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  • The application of nonlinear architectures to adaptive channel equalisation

    Publication Year: 1990, Page(s):649 - 653 vol.2
    Cited by:  Papers (7)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    The authors investigate the potential value of applying nonlinear architectures to the adaptive equalization of a bipolar signal passed through a dispersive channel in the presence of additive noise. The problem is described as a geometrical classification problem and the factors affecting the complexity of the problem are considered. In particular, it is shown that some degree of nonlinearity is ... View full abstract»

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  • Switch architecture evolution in SONET networks

    Publication Year: 1990, Page(s):552 - 556 vol.2
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (468 KB)

    The implications, and requirements of switching nodes of the 1990s are discussed, and an architecture which meets those requirements is presented. The architecture defines a multifunction network platform which flexibly and efficiently supports the full range of existing and emerging services and nodal functions. The platform will be based on a layered architecture which decouples resources, minim... View full abstract»

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  • Interception of frequency hopped spread spectrum signals

    Publication Year: 1990, Page(s):641 - 648 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    A frequency-hopped, spread-spectrum signal is modeled as a sinusoid that has one of N random, discrete frequencies. Based on this model, the Neyman-Pearson detection theory is used to derive optimum coherent and noncoherent receiver structures. It is shown that the probability of detection, PD, approaches, the probability of false alarm, PF, as ... View full abstract»

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  • High quality coding of telephone speech and wideband audio

    Publication Year: 1990, Page(s):927 - 931 vol.3
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (452 KB)

    Advances in signal processing which have created several new technologies for high-quality digital audio are discussed. For traditional telephony, characterized by a signal bandwidth of about 3.2 kHz, the transmission rate for network quality speech is now down to 16 kb/s, with the prospect of a new standard from the CCITT. Robust communications quality appropriate for cellular radio has been real... View full abstract»

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  • Electro-optic switching systems

    Publication Year: 1990, Page(s):1130 - 1134 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (532 KB)

    Potential network applications of photonic switching based on the use of guided-wave electrooptics technology are reviewed. The characteristics and limitations of the component technologies for space and time switching are discussed with reference to the present state of the art. Systems experiments and demonstrations are described. It is noted that technology for electrooptic switch arrays has pr... View full abstract»

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  • From fiber to the home to full broadband ISDN

    Publication Year: 1990, Page(s):547 - 551 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    The author presents an evolutionary path for the broadband integrated service digital network (B-ISDN), starting with the installation of fibers to the home. Basing the target B-ISDN network on asynchronous transfer mode (ATM) technology (which is quite different from current circuit switching used by telephone networks) is being considered. The author suggests a four-phase evolution. Fiber to the... View full abstract»

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  • A robust adaptive filtering algorithm with variable step size

    Publication Year: 1990, Page(s):636 - 640 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    A varible-step adaptive normalized least mean square (VS-NLMS) filtering algorithm which is robust in the presence of interferences is presented. An estimated cross-correlation function between the input reference signal and the error signal is used as the variable step size. An exponential weighting recursive estimation algorithm is proposed to update the cross-correlation coefficients. Compared ... View full abstract»

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