Global Telecommunications Conference, 1995. GLOBECOM '95., IEEE

14-16 Nov. 1995

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  • Globecom '95 - The Global Telecommunications Conference

    Publication Year: 1995
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  • A lower performance bound for phase estimation over slowly-fading Ricean channels

    Publication Year: 1995, Page(s):2012 - 2016 vol.3
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1241 KB)

    In this paper we present a fundamental lower bound to the mean-square error of estimators of the phase of a sine wave passed through a Ricean fading channel. As particular cases, expressions of the bound inherent to Gaussian and Rayleigh channels are also provided. The bound is derived from the performance analysis of the Bayes minimum mean-square error phase estimator. The salient features of thi... View full abstract»

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  • CONFERENCE AUTHOR INDEX

    Publication Year: 1995
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    Freely Available from IEEE
  • Influence of the phase relationship between direct path and interference path on XPIC performance

    Publication Year: 1995, Page(s):2017 - 2021 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    The article analyses the dependence of the XPIC (“cross-polar interference canceller”) performance from the phase relationship between direct path and interference path in terrestrial radio relay links. By means of theoretical considerations and simulation results it is shown that the XPIC (based on minimum mean square error criterion) can totally cancel the cross-polar interference fo... View full abstract»

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  • Fault-tolerant sorting network for ATM switching

    Publication Year: 1995, Page(s):2075 - 2079 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    The asynchronous transfer mode (ATM) has been accepted as the most promising approach for the broadband integrated services digital network (B-ISDN). This paper proposes a self routing fault-tolerant sorting network that employs an enhanced scheme of the Batcher sorting network. It consists of two Batcher sorting planes with links provided at every stage to allow cell transfer to and from each sor... View full abstract»

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  • Estimation of SS7 traffic in UMTS network

    Publication Year: 1995, Page(s):2302 - 2307 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    In this paper, we present a general model for the prediction of signaling traffic in a network where the terminal mobility shares the signaling infrastructure of fixed services. The model uses state transitions to estimate calling patterns and usage of services. In addition, methods of mapping state transitions to physical movements are presented. We examine a number of dynamic phenomena observed ... View full abstract»

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  • Multicast switch based on tandem expanded delta network

    Publication Year: 1995, Page(s):1707 - 1711 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (452 KB)

    High speed networking applications like video-on-demand require the support of switches which can handle very high multicast loads. B-ISDN switches with multicasting capabilities can be used to support such applications efficiently. These switches must be fast and the routing delays for the packets must be small. The switches studied in the literature can support multicast loads (ratio of number o... View full abstract»

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  • ShuffleNet=hypercube×ring and embedding ShuffleNet on mesh network

    Publication Year: 1995, Page(s):1766 - 1772 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (556 KB)

    ShuffleNet as an optical connectivity has been proposed extensively for use in the implementation of high-throughput multihop lightwave networks. A ShuffleNet uses a small, fixed number of transceivers per network access node and provides nearly optimal throughput. However, building multihop networks using ShuffleNets requires either a large number of fibers or a large number of wavelengths. We fo... View full abstract»

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  • How to combat long echoes in OFDM transmission schemes: sub-channel equalization or more powerful channel coding

    Publication Year: 1995, Page(s):2069 - 2074 vol.3
    Cited by:  Papers (30)  |  Patents (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    The OFDM technique with guard-time, which has been proposed for terrestrial digital image and digital audio broadcasting applications in Europe, is an interesting approach to combat the frequency selectivity of the channel. However, it is sensitive to the interference caused by echoes longer than the guard-time. The aim of this article is twofold. First, the effects of the guard interval on a real... View full abstract»

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  • Signal restoration and BER performance of perturbed terrestrial cascaded EDFA systems

    Publication Year: 1995, Page(s):1992 - 1995 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    Signal restoration and bit-error-rate (BER) performance of perturbed terrestrial cascaded erbium-doped fiber amplifier (EDFA) systems is analyzed after the introduction of a normalized and revised EDFA gain formula. Results show that the total optical power can restore to 90 percent of its unperturbed value within 3 stages when the system suffers a 3 dB EDFA output power dip. The corresponding sys... View full abstract»

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  • Recursive systematic convolutional codes and application to parallel concatenation

    Publication Year: 1995, Page(s):2267 - 2272 vol.3
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    This paper deals with a new class of convolutional codes called recursive systematic convolutional (RSC) codes. These codes are very attractive when compared with the best known convolutional codes at low signal to noise ratio (SNR) and high code rate. A comparison with the best known convolutional codes is performed in terms of weight spectrum and bit error rate (BER) on a memoryless Gaussian cha... View full abstract»

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  • A feasible architecture for high-speed synchronous CDMA distribution network using optical processing

    Publication Year: 1995, Page(s):1794 - 1798 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    We propose a feasible architecture to implement tunable all-optical synchronous CDMA networks. Such a network is simply based on single rapidly tunable optical delay-lines and requires only a small number of electro-optic switches. Fast coding and decoding algorithms for synchronous prime-sequence codes are described. By using the proposed technique, all-optical synchronous CDMA networks can be co... View full abstract»

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  • Near-optimal routing for voice and data traffic in integrated broadband networks

    Publication Year: 1995, Page(s):2139 - 2145 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    Reduced-load approximation techniques are developed for evaluating accurately and efficiently end-to-end performance measures for integrated voice/data broadband networks with arbitrary connectivities and link capacities. Circuit-switching is used for the voice traffic while packet-switching is used for the data traffic which takes advantage of the silent periods of voice calls. The knapsack and P... View full abstract»

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  • Interference localisation for the Eutelsat satellite system

    Publication Year: 1995, Page(s):1641 - 1651 vol.3
    Cited by:  Papers (7)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (844 KB)

    In its effort to minimise the damage to satellite traffic caused by interference, EUTELSAT undertook, together with DRA (UK Defence Research Agency), a study aimed at determining the benefits provided by the current transmitter location techniques. The study included a theoretical phase and a measurement campaign involving the execution of a number of tests on simulated interference using a transm... View full abstract»

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  • The link allocation problem on ATM-based personal communication networks

    Publication Year: 1995, Page(s):2297 - 2301 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    The wireless personal communication networks (PCN) will play an important role throughout the 1990s and into the next century. Due to the demand for extending the wireless services to integrated services such as data, voice, images and video, a high speed backbone network to connect the base stations in the microcells is required. One of the possible solutions is to apply the ATM-based backbone ne... View full abstract»

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  • Traffic modeling: matching the power spectrum and distribution

    Publication Year: 1995, Page(s):1701 - 1706 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (668 KB)

    This paper examines the validity of the Markovian assumption which is commonly made for modeling of correlated traffic in network analyses. Indeed, real traffic is likely to be nonMarkovian. A fundamental issue in traffic modeling is whether the Markovian assumption has any significance on the queueing solutions. Our study compares the queueing solutions obtained using traffic models with very dif... View full abstract»

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  • High speed programmable ATM-HUB for HIPPI/STM-4 data network

    Publication Year: 1995, Page(s):2092 - 2096 vol.3
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (736 KB)

    A programmable ATM-HUB is developed to realize high speed ATM communication by utilizing the full bandwidth of 155/622 Mbps on an STM-1/STM-4 transport system. High performance workstations can connect to this system via 800 Mbps HIPPI and 155/622 Mbps optical lines. The ATM-HUB's main circuits consist only of FPGAs and memory. The ATM-HUB's wired logic is programmable, making it possible to imple... View full abstract»

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  • UWIN-universal wireless infrared network system

    Publication Year: 1995, Page(s):2008 - 2011 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    Wireless data communications are being implemented by the complementary technologies of RF and IR. The RF options provide larger area coverage than wireless optical communications but are limited in full bandwidth throughput to about 5 Mbps whereas the infrared systems described in the present paper using IR-LED have achieved data rates up to 125 Mbps. Token ring, Ethernet and PABX (voice) are thu... View full abstract»

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  • Line rate(s) selection for cellular DS-CDMA systems with integrated traffic

    Publication Year: 1995, Page(s):1809 - 1813 vol.3
    Cited by:  Papers (1)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (524 KB)

    Fong et al. (1994, 1995) introduced the idea of using the concatenated orthogonal/PN spreading scheme for integrated traffic. Fong et al. (1995) proposed using a single line rate (adjusted data rate before spreading) to accommodate traffic with a wide range of source rates. In this paper, we further investigate the choice of line rate(s) (either single or multiple) with emphasis on its effect on s... View full abstract»

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  • Experimental demonstration of a high-speed all-optical tunable-channel multi-access (TCMA) network

    Publication Year: 1995, Page(s):1761 - 1765 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (484 KB)

    This paper presents the experimental demonstration of an ultrahigh-speed all-optical tunable-channel multi-access (TCMA) network based on novel ideas and technologies that could surmount the difficulties in ultrahigh-speed optical time-domain-multiaccess (TDM) networking. The demonstration includes: simple and fast channel-tuning capability with channel switching time <5 ns, high speed optical ... View full abstract»

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  • Design and implementation of TDX-10 management system incorporating TMN concept

    Publication Year: 1995, Page(s):1845 - 1849 vol.3
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    We present an architecture and techniques to manage the TDX-10 switching system based on the ITU-T TMN management model. We extend OSIMIS network management platform to implement generic TMN applications. The hierarchical fault management services/functions are implemented, incorporating the logical layered architecture concept of the TMN management model. The various components of the TDX-10 syst... View full abstract»

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  • COFDM for broadcasting satellites in elliptical orbits

    Publication Year: 1995, Page(s):2064 - 2068 vol.3
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    This paper analyses the performance of a coded orthogonal frequency division multiplexing (COFDM) based system for digital audio broadcasting using a highly inclined orbit satellite constellation. The sources of performance degradation considered are nonlinear amplification in the satellite transponder and multipath propagation for mobile reception. Despite its strong peak-to-mean amplitude variat... View full abstract»

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  • Coherent fiber-optic microcellular radio communication system using RF-to-optic direct conversion scheme

    Publication Year: 1995, Page(s):1987 - 1991 vol.3
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    This paper proposes a new coherent fiber-optic microcellular radio communication system using an RF-to-optic direct conversion scheme. In this system a radio signal is converted into an optical signal with the same signaling or multiplexing format for coherent transmission through a wideband optical fiber without any baseband demodulation and modulation. The theoretical analysis and computer simul... View full abstract»

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  • An accelerated search algorithm for punctured convolutional codes

    Publication Year: 1995, Page(s):2262 - 2266 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    An accelerated search algorithm for punctured convolutional codes is presented. Its application yields a significant extension of recent results on punctured convolutional codes to higher rates (up to 13/14) and longer memory (up to 12). The algorithm enables the search of a new class of codes, defined over a much larger code space, which provides greatly improved error performance. The new codes ... View full abstract»

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  • Multi-rate detection for the IS-95 CDMA forward traffic channels

    Publication Year: 1995, Page(s):1789 - 1793 vol.3
    Cited by:  Papers (12)  |  Patents (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    The IS-95 direct sequence code division multiple access (DS-CDMA) system has become a US digital cellular standard. In the forward traffic channels (from the base station to the mobiles), the speech encoder rate can vary, depending on the speech activity in the transmitter. At the receiver, the decoder does not know which one of the speech encoder rate the transmitter used. This paper focuses on t... View full abstract»

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