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Global Telecommunications Conference, 1993, including a Communications Theory Mini-Conference. Technical Program Conference Record, IEEE in Houston. GLOBECOM '93., IEEE

Date Nov. 29 1993-Dec. 2 1993

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Displaying Results 1 - 25 of 400
  • Proceedings of GLOBECOM '93. IEEE Global Telecommunications Conference

    Publication Year: 1993
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    Freely Available from IEEE
  • Comparative reliability of SONET rings in feeder applications

    Publication Year: 1993, Page(s):671 - 674 vol.2
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    The paper examines the predicted reliability of SONET rings in the feeder as a function of various parameters. Markov models are used to calculate service downtime according to the number of nodes on the ring, failure rates, repair times, etc. These, in turn, are compared to the predicted reliability of a copper-based point-to-point feeder architecture. The results demonstrate the improvements in ... View full abstract»

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  • Coherent analog optical links: design, performance and potential applications

    Publication Year: 1993, Page(s):1886 - 1890 vol.3
    Cited by:  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    Coherent analog optical links offer several important advantages over conventional direct detection links: better receiver sensitivity, possible use of angle modulation and easy separation of WDM signals and frequency translation. We propose a novel coherent AM-WlRNA optical link, and analyze and optimize its performance. With proper system design, the coherent AM link is insensitive to the laser ... View full abstract»

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  • Performance of optimum diversity combining and equalization with co-channel interference in mobile radio channel

    Publication Year: 1993, Page(s):91 - 97 vol.1
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (468 KB)

    The paper presents a statistical and theoretical analysis of Nth-order diversity reception combined with equalization in a mobile radio channel. The diversity paths are statistically independent and each is characterized by the sum of multiple delayed and independent Rayleigh-fading beams. In modeling the multi-path radio performance, the authors take into account co-channel interference (CCI) gen... View full abstract»

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  • Performance analysis of Shufflenet with deflection routing

    Publication Year: 1993, Page(s):854 - 859 vol.2
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    Multi-hop communication networks are drawing increasing interest. Shufflenet is a multi-hop communication network which achieves high performance while overcoming the current shortcomings in device technology. The authors present a new and comprehensive analysis for Shufflenet. By making use of the connectivity properties of any (p, k) Shufflenet, they characterize the probabilistic behavior of a ... View full abstract»

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  • The ways towards PCS

    Publication Year: 1993, Page(s):560 - 563 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    Nations throughout the world are beginning to realize the extraordinary potential of a new generation of wireless telephone services encompassed within the concept of personal communications services (PCS). The wireless bandwagon prompted the telecommunication research organizations and manufacturers, even the governments in the world, to pay the close attention to the revolution of the telecommun... View full abstract»

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  • A large-scale multicast output buffered ATM switch

    Publication Year: 1993, Page(s):34 - 41 vol.1
    Cited by:  Papers (8)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (620 KB)

    The paper proposes a recursive modular architecture for implementing a large-scale multicast output buffered ATM switch (MOBAS). Many proposed multicast switch architectures have a size limitation problem because their switches use either (1) a centralized processing unit for cell replication and routing, (2) a shared medium for cell transmission and storage, or (3) an irregular interconnection ne... View full abstract»

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  • Dynamic bandwidth allocation in integrated communication networks

    Publication Year: 1993, Page(s):1558 - 1562 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (468 KB)

    With the advances in switching technology and network management, dynamic allocation of link bandwidth in logical networks built on top of the physical transmission network is possible. An algorithm for dynamic bandwidth allocation is proposed. The proposed algorithm integrates bandwidth allocation of the packet switched network and the circuit-switched network. Flexible channel assignment of logi... View full abstract»

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  • Blind identification of terrestrial microwave radio channels

    Publication Year: 1993, Page(s):2011 - 2016 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    In microwave radio links applications blind equalization is useful to limit communication outages caused by severe selective fading. Recently, a new approach was proposed that combines blind identification and equalization. The resulting algorithm converges globally, can resolve the nonminimum phase zeros of the channel transfer function, is robust with respect to timing recovery, and uses only se... View full abstract»

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  • Frequency interference measurement experiment results for the space-to-space communications subsystem (SSCS)

    Publication Year: 1993, Page(s):956 - 960 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    The paper presents the results from the frequency interference measurement (FIM) experiments which have flown on two Space Shuttle Orbiter (SSO) flights. These FIM experiments collected potential interference data for the 410-420 MHz frequency band. The space-to-space communication subsystem (SSCS) will operate within this frequency band to provide extravehicular activity (EVA) communications for ... View full abstract»

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  • Concurrent network management system using distributed processing techniques

    Publication Year: 1993, Page(s):202 - 206 vol.1
    Cited by:  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (500 KB)

    This paper proposes a concurrent network management system which can integrate various management applications in an efficient way. The proposed system provides both techniques and tools to attain concurrent execution of management applications in a distributed processing environment. For instance, each concurrently executed management application has its own communication module, named the virtua... View full abstract»

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  • A novel selection diversity technique for MSK using hardlimiter output

    Publication Year: 1993, Page(s):908 - 912 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    Often mobile radio channels encounter severe fading obstructions. A link stabilization may be achieved using diversity. A selection diversity technique for MSK allowing synchronization as well is proposed. With the aid of characteristic functions, its properties are derived. Using both analysis and simulation, the criteria are compared and show similar performance. Both criteria almost yield ideal... View full abstract»

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  • Analytical models for the performance evaluation of banyan networks with shared queueing

    Publication Year: 1993, Page(s):860 - 866 vol.2
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (612 KB)

    Multistage banyan interconnection networks are studied in which the switching elements are provided with a buffer shared among all the inlets and outlets of the element. No internal backpressure protocols are adopted in the network so that packets can be lost at any stage due to buffer overflow. Three analytical models have been developed for the analysis of these networks when loaded by random tr... View full abstract»

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  • Analysis of coherent and differential detection for trellis-coded 8-PSK over satellite flat Rician fading channels

    Publication Year: 1993, Page(s):1782 - 1786 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    Trellis-coded 8-PSK (TC-8-PSK) modulation is a power and bandwidth efficient modulation scheme which is finding increasing applications in terrestrial and satellite systems. In particular, TC-8-PSK is demonstrating attractive performances over the satellite mobile fading channel where it provides considerable coding gain with respect to uncoded QPSK with no bandwidth efficiency loss. In the paper ... View full abstract»

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  • A performance analysis of trellis coded modulation schemes in non-independent Rician fading channels

    Publication Year: 1993, Page(s):1424 - 1428 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    The paper presents a new upper bound on the pairwise error probability (PEP) of trellis-coded modulation (TCM) schemes over nonindependent Rician fading channels. The bound is quite general, e.g., applicable to ideal coherent and pilot-tone aided detection, and differential detection, etc. Being quite accurate, the bound can be used in conjunction with a truncated union bound to estimate the bit e... View full abstract»

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  • Performance modeling of a class of low Earth orbit satellite networks

    Publication Year: 1993, Page(s):569 - 573 vol.1
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    The performance of a class of low Earth orbit satellite networks used for instant global communications is investigated. Three different topologies varying in connectivity are investigated. The average delay per message of these topologies under different traffic patterns is obtained through using stochastic Petri net (SPN) modeling schemes and the use of Little's theorem. Analytical results, such... View full abstract»

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  • Reverse channel performance improvements in CDMA cellular communication systems employing adaptive antennas

    Publication Year: 1993, Page(s):42 - 47 vol.1
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (508 KB)

    The authors examine the performance enhancements that can be achieved by employing adaptive antennas in code division multiple access (CDMA) cellular radio systems. The goal is to determine what improvements are possible using narrowbeam antenna techniques, assuming that adaptive algorithms and the associated hardware to implement these systems can be realized. Simulations and analytical results a... View full abstract»

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  • Diversity measurement technique for wideband mobile radio

    Publication Year: 1993, Page(s):1237 - 1241 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    A new method has been developed for the simultaneous measurement of the complex impulse responses in two diversity branches using only one channel sounder. The two diversity antennas are installed at the transmitter site. The carrier frequencies of the transmitted pseudo-noise signals in the two branches are slightly shifted by ±fd0 relative to the center frequency of the receive... View full abstract»

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  • Inter-network roaming based on personal digital cellular standards

    Publication Year: 1993, Page(s):1944 - 1949 vol.3
    Cited by:  Papers (3)  |  Patents (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    The paper describes inter-network roaming based on the standards of Japan's digital cellular system called personal digital cellular (PDC). The gateway location register (GLR) is defined for mobile users roaming from the home network to the visited network. The numbering plan includes the mobile subscriber ISDN number, international mobile station identity, location area identity and roaming numbe... View full abstract»

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  • Hardware implementation of a secure bridge in Ethernet environments

    Publication Year: 1993, Page(s):177 - 181 vol.1
    Cited by:  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    Presents a solution providing secure communications over an extended Ethernet LAN. This solution, proposed by the Applied Mathematics and Telematics Department of the Polytechnic University of Catalonia, is based on a set of secure bridges, called cryptonets, and a supervision and administration center (SAC), which takes charge of the remote management of the work of these devices. A first version... View full abstract»

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  • Software architectures and network management: A parallel evolution

    Publication Year: 1993, Page(s):641 - 645 vol.1
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (536 KB)

    We are witnessing a progressive overlapping of many, once separated, pieces of the telecommunication world: transmission and switching boundaries are getting blurred, the concept of service cannot be easily partitioned into delivering and managing, the provisioning is entangled with operation, maintenance-operation and network architectures are intertwined. This convergence will continue in the fu... View full abstract»

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  • Performance analysis of an all digital BPSK demodulator

    Publication Year: 1993, Page(s):1670 - 1676 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    A simulation algorithm was developed to analyze the performance of the binary phase shift key (BPSK) Costas loop coupled to the symbol sync loop (SSL). This algorithm was developed using COMDISCO's Signal Processing Work System. Inputs to the algorithm included the signal parameters and receiver specifications, such as Costas and symbol sync loop bandwidths and update rates. The analysis was perfo... View full abstract»

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  • Performance trending for management of high-speed packet-switched networks

    Publication Year: 1993, Page(s):1777 - 1781 vol.3
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    Due to technological advances, computer communication networks are becoming increasingly complex. In addition, applications require networks to provide high performance and reliability. Placing such demands on these networks necessitates an efficient network management. Many existing systems perform data collection and reporting only, and so operators must use their own expertise to do aid the tro... View full abstract»

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  • FASTAR operations in the real AT&T transport network

    Publication Year: 1993, Page(s):229 - 233 vol.1
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    FASTAR is a robust, reliable, fast-response system for automated network restoration, now fully deployed and operational throughout the AT&T digital transport network. FASTAR reduces by orders of magnitude the average service outage time that customers experience as a result of transmission failures. Its architecture combines centralized and distributed intelligence to provide full automation ... View full abstract»

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  • Adaptive channel identification algorithms for GSM digital mobile radio

    Publication Year: 1993, Page(s):288 - 292 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (508 KB)

    The paper is concerned with adaptive channel identification algorithms for use within the highly time variant radio communications environment. More specifically the problem of Viterbi equaliser coefficient computation within the GSM digital mobile radio system is considered. Within the paper algorithms which employ a priori knowledge of the time variant characteristics of the channel in order to ... View full abstract»

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