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8th European Conference on Electrotechnics, Conference Proceedings on Area Communication

13-17 June 1988

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Displaying Results 1 - 25 of 118
  • EUROCON 88: 8th European Conference on Electrotechnics. Conference Proceedings on Area Communication (Cat. No.88CH2607-0)

    Publication Year: 1988
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    Freely Available from IEEE
  • US cellular network in the 90s

    Publication Year: 1988
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (22 KB)

    Summary form only given. Cellular RF technology needs are described, along with constraints on introducing novel RF technologies. A cellular network architecture referred to as the cellular access digital network (CADN) is described as a proposed basis for the digital cellular network. The concept of the CADN digital subscriber channel and universal service access and the activities associated wit... View full abstract»

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  • The use of digital technology for new mobile services

    Publication Year: 1988
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (42 KB)

    Summary form only given. Current and near-future products and services in the area of cellular radio are briefly described, focusing on digital technology. Developments in short-range indoor office communication systems are sketched. The concept of the personal telephone is considered.<> View full abstract»

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  • Propagation aspects of datacommunication over the radio channel - A tutorial

    Publication Year: 1988, Page(s):301 - 305
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (316 KB)

    The various error mechanisms in the time-varying, frequency-selective mobile channel are discussed from a propagation point of view. Starting with a two-ray model, both the frequency and time domain are discussed for the narrowband case, where the delay spread is less than the symbol period, and for the more general broadband case. the major importance of the product of bandwidth and delay spread ... View full abstract»

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  • The digital FSK receivers implemented by the TMS32010 signal processors

    Publication Year: 1988, Page(s):436 - 439
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    The authors present some results from the measurements of a digital frequency-shift keying detector implemented with TMS32010 digital signal processors. They estimate the acceptable limits of some nonidealities. From the data measured with a 9600 b/s detector, it is found that at Pe=10-2, a 1-dB increase in Eb/N0 can compensate... View full abstract»

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  • RF engineering techniques for a 900 MHz digital cordless telephone service

    Publication Year: 1988, Page(s):433 - 435
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (176 KB)

    The effect of a low-cost, high-volume market for radio products at 900 MHz on established manufacturing technology is examined. The principal engineering points associated with implementing suitable RF in surface-mount technology on conventional PCB substrate materials and with existing components are outlined View full abstract»

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  • A performance analysis of protocols for multicast communication in broadband packet networks

    Publication Year: 1988, Page(s):222 - 226
    Cited by:  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    The authors illustrate some of the notions that can influence the modeling and design of protocols for broadband networks by analyzing the delay-throughput performance of two protocols for reliable multicast communication: a conventional protocol based on a direct extension of the positive acknowledgement scheme, and a recently developed protocol based on an enhanced negative acknowledgement schem... View full abstract»

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  • Performance of an implemented complex correlator with a simulated stationary dispersive radio channel

    Publication Year: 1988, Page(s):430 - 432
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (172 KB)

    A hardware real-time complex correlator has been designed to be included in a radio modem with a decision feedback equaliser (DFE). Multiplexing of the two input signals has been used to implement the whole complex correlator with only one shift register with a doubled length and two sets of coefficients. Measurements on eight nondispersive channels with different phase shifts reveal a slight unba... View full abstract»

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  • From cordless through to personal communications

    Publication Year: 1988, Page(s):11 - 13
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    The situation in the UK for cordless telephony is outlined as its evolution progresses from the first-generation to the second-generation digital products. Second-generation products provide a diverse range of applications, including cordless business systems and the public Phonepoint service. The evolutionary path to cordless/personal communications products for the 1990s is discussed View full abstract»

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  • A high speed access mechanism for a multiservice LAN at 144 Mbps

    Publication Year: 1988, Page(s):256 - 260
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (316 KB)

    The design and implementation of a high-speed access control mechanism for a multiservice LAN (local area network) with a transmission medium speed of 140 Mb/s is presented. The implementation uses discrete components of the fast TTL (transistor-transistor logic) family because the operational speed of the system is 18 Mbytes/s. The experimental results show that the required time for a delimiter ... View full abstract»

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  • Distributed learning algorithms for data network routing problem: models, convergence analysis and optimality

    Publication Year: 1988, Page(s):218 - 221
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB)

    The behavior of the automata at the nodes of a data network is studied for an abstract network representation in which only very general functional properties are assumed. A model of a nonstationary environment is proposed with state variables as penalty parameters. The limiting behavior of the model is studied. Simulation results shown that under abnormal conditions (i.e. change of topology) the ... View full abstract»

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  • Satellites and ISDN

    Publication Year: 1988, Page(s):425 - 429
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    ISDN (integrated-services digital network) implementation in Europe is still slow in some countries mainly due to time and investment constraints on upgrading the terrestrial network. It is suggested that using satellites can, in the early phase of ISDN development, speed up the process by providing faster and more flexible paths over a wider area than the terrestrial network and by offering a hig... View full abstract»

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  • Analysis and synthesis of cellular structures for mobile radio systems

    Publication Year: 1988, Page(s):354 - 357
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB)

    The author presents original and tutorial material on cellular lattice structures. Three aspects of lattice regularity are explained and deformability of interference-limited structures is examined. System traffic load is analyzed versus lattice density and cluster size. The author emphasizes the merits of splitting cells into sectors and of diversified multiplexing. Rules for synthesis of nonunif... View full abstract»

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  • The effect of co-channel and co-site interferers in spread spectrum systems

    Publication Year: 1988, Page(s):399 - 403
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    An examination is made of the performance deterioration of multiple-access radio systems using spread spectrum modulation due to the presence of colocated or cosited interferers. Cositing interferers are simulated with a general-purpose computer program. Effects of colocation interference are measured using a radio prototype. For the particular radio system under consideration, it is concluded tha... View full abstract»

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  • Simulation of an ISPBX based on a LAN

    Publication Year: 1988, Page(s):252 - 255
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (168 KB)

    A discussion is presented of the use of a packet-switching LAN, the Pseudo Star, as the nucleus of an ISDN PBX. Simulation results demonstrate that under heavy load its temporal behavior is compatible with packetized voice-handling, which is crucial in such a system. The authors also describe the medium access method and the simulation model used, in which it is assumed that the subnet be modeled ... View full abstract»

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  • Specification and validation of services and protocols for a public land mobile ISDN system

    Publication Year: 1988, Page(s):214 - 217
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    A public land mobile network (PLMN) proposed by CEPT is presented. A subset of the PLMN protocol architecture is described, and its formal validation (verification) is outlined. The PLMN validation illustrates that by considering validation already in the specification phase, it is possible to verify complex communication systems View full abstract»

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  • A combinatorial approach for analyzing adaptive echo cancellers

    Publication Year: 1988, Page(s):93 - 97
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    A combinatorial approach has been developed for analyzing adaptive echo cancellers. This type of analysis is complimentary to the error variance approach, emphasizing details of the adaptive process generally not discussed, such as the interaction between tap coefficients. The author shows that the approach gives good agreement with simulated results. The combinatorial approach can also be used fo... View full abstract»

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  • Digital modulation and coding for mobile communications

    Publication Year: 1988, Page(s):421 - 424
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    M-ary phase shift-keying (MPSK) and M-ary frequency-shift-keying (MFSK) are compared for transmission over a Rayleigh faded radio channel of limited bandwidth. Both diversity and coding improvements are assessed for coupling with the M-ary signal alphabet. It is shown that phase modulation, with coherent or differentially coherent detection, outperforms orthogonal MFSK s... View full abstract»

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  • The GSM base station system and the related equipment [mobile communications]

    Publication Year: 1988, Page(s):470 - 473
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    A brief overview of the GSM (CEPT's Groupe Special Mobile) base station system (BSS) is given. The equipment needed to support this network entity and the specification of the equipment are presented. The use of the BSS equipment specification is described and the testing of the GSM base station systems is discussed. BSS network functions are outlined and the A-bis-interface is described View full abstract»

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  • Analysis of an erasure decoding scheme and its capability for concatenated codes

    Publication Year: 1988, Page(s):158 - 161
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (204 KB)

    The author investigates an erasure decoding scheme for a special class of concatenated codes which is efficient in the sense of correcting a single burst, multiple bursts and random erasures, as well as the combination of bursts and random erasures. The erasure decoding capability is investigated. A qualitative comparison is made between the concatenated codes and several other codes View full abstract»

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  • Real time implementation of forward gain-adaptive vector quantizer

    Publication Year: 1988, Page(s):40 - 43
    Cited by:  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    A realization of a real-time forward-adaptive vector quantizer (VQ) for speech waveform coding on the TMS32010 digital-signal processor (DSP) chip is described. Two encoding algorithms have been implemented: the full search (vector dimension K=5) and search in subcodebook determined by the index and sign of the input vector co-ordinate having maximum magnitude (K=8). The speech s... View full abstract»

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  • Cordless telecommunications: towards a digital standard

    Publication Year: 1988, Page(s):379 - 382
    Cited by:  Papers (5)  |  Patents (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    Possible future applications for cordless telecommunications are presented, and the steps towards European standardization which have been taken so far are outlined. Standards currently in existence and in use, including the CEPT CT1 standard, are reviewed View full abstract»

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  • Land mobile radio versus congestion

    Publication Year: 1988, Page(s):350 - 353
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    A discussion is presented of the problem of congestion caused by the lack of radio frequency channels available for land mobile use, relative to the demand. A brief history of radio spectrum use is followed by a discussion of the present situation with regard to land mobile radio. Techniques to improve spectrum efficiency are discussed View full abstract»

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  • Signalling system no.7

    Publication Year: 1988, Page(s):452 - 454
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    A description is given of the application, features, and architecture of signalling system no.7. Both the initial and the current architecture are covered. An overview is given of its implementation in the European countries View full abstract»

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  • Multiple-user interference in FH-MFSK mobile radio

    Publication Year: 1988, Page(s):395 - 398
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    The authors consider practical approaches to multiple-access communication in spread-spectrum mobile radio. Efficient field test and data processing methods are given, and the field test results are described. Bit-error-rate (BER) performance with both one and four interferers is measured, with good agreement between field and laboratory results. In the single interferer case, the BER is 10-1... View full abstract»

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