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

13-17 June 1988

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  • 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
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    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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  • Cochannel interference of a satellite spread spectrum system in a multiuser environment

    Publication Year: 1988, Page(s):265 - 268
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    The performance of a code-division multiple access (CDMA) system is discussed. This work is pertinent to a satellite system architecture proposed for the future data relay satellite (DRS) of the European Space Agency (ESA). The limitations of this type of access are due to interference from other users. These limitations are magnified by variations in signal strength at the demodulator input. A qu... View full abstract»

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  • The GSM system simulator [mobile radio]

    Publication Year: 1988, Page(s):478 - 481
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (272 KB)

    The GSM (CEPT's Groupe Special Mobile) system simulator is a collection of emulation and measurement tools to be used when testing mobile stations for conformance with the CEPT/GSM recommendations. The author presents functions and requirements for the system simulator. The emphasis is placed on functions for signalling testing, since detailed information on the radio measurement equipment is not ... View full abstract»

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  • Specification methodology applied to the GSM system

    Publication Year: 1988, Page(s):458 - 461
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (312 KB)

    An insight is provided into the methodology applied to the CEPT GSM (Groupe Special Mobile) pan-European digital cellular mobile radio system. A description is given of how decisions and system requirements have shaped the specification methodology. The approach is based on proven practice used in other international specifications. The GSM has supplemented the practice with a comprehensive review... View full abstract»

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  • Adaptive clock synchronization schemes for real-time traffic in broadband packet networks

    Publication Year: 1988, Page(s):84 - 88
    Cited by:  Papers (8)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (500 KB)

    The authors illustrate the phenomenon of packet jitter using a simple example and propose methods by which the destination clock frequency can be adjusted, so that it follows the source clock frequency asymptotically while minimizing the effects of packet jitter on the outgoing packet stream. They provide a comprehensive asymptotic analysis of the estimation and control algorithms and discuss thei... View full abstract»

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  • High speed data communication by satellite in Europe-the HELIOS architecture

    Publication Year: 1988, Page(s):261 - 264
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    A description is given of the HELIOS architecture, which is based on access points running on OSI data link protocol and acting as gateways between the satellite circuit and a local area network. The access points consist of Bull SPS/7 minicomputers; test of a preliminary version of the software have allowed the successful transmission of files at 128 kb/s between Paris and Brussels. Being totally... View full abstract»

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  • Type approval of GSM mobile stations

    Publication Year: 1988, Page(s):474 - 477
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (392 KB)

    Type approval of GSM (CEPT Groupe Special Mobile) stations has administrative and technical aspects. The administrative procedures are the ones prepared for application to all nets. Broad areas for the testing of technical characteristics are derived from a model of the mobile station. The way in which specifications are drafted for individual areas to be tested is indicated View full abstract»

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  • Propagation and bit error rate measurements within buildings in the millimeter wave band about 60 GHz

    Publication Year: 1988, Page(s):318 - 321
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (296 KB)

    There is a significant interest in the millimetric waveband around 60 GHz for providing integrated personal communications for a wide range of digital services to mobile users and data terminals. Furthermore, with recent advances in GaAs technology, the use of 60 GHz in broadband short-range point-to-point links is also the subject of much investigation at the moment. A study of propagation and bi... View full abstract»

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  • End-to-end error recovery in ISDNs employing LAPD protocol on bearer channels

    Publication Year: 1988, Page(s):210 - 213
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    A comparison between two possible implementations, edge- and mixed-terminated, of LAPD protocol, to be used on the bearer channels of ISDNs, is presented. Mixed-terminated LAPD is characterized by terminating the protocol at the edge nodes and allocating to the transit nodes a subset of functionalities. The comparison shows that edge-terminated LAPD is superior to mixed-terminated under various lo... 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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  • Overview of the GSM project [mobile communications in Europe]

    Publication Year: 1988, Page(s):455 - 457
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (332 KB)

    During the 1970s and 1980s, many European countries introduced mobile communication systems. Most of these are totally incompatible, and CEPT therefore decided in 1982 to create a working group, GSM (Groupe Special Mobile), to study the possibility of a pan-European system. The author describes the course and present status of this work View full abstract»

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  • Optimal design of a modified code tracking loop

    Publication Year: 1988, Page(s):80 - 83
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (236 KB)

    Optimal design rules are presented for a noncoherent code tracking loop in DS-SS systems. The loop studied here is the modified code tracking loop. Two criteria are considered: the mean time to loss of lock (MTLL) and the probability of error (Pe) in the data due to imperfect synchronization. The MTLL is calculated by solving Kolmogorov's partial differential equation using the... 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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  • 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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  • Measured inhouse radio wave propagation characteristics for wideband communication systems

    Publication Year: 1988, Page(s):314 - 317
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (344 KB)

    The frequency-selective radio-wave propagation characteristics for in-house communication systems are statistically characterized for the cases of line-of-sight and obstructed path propagation. Using the theory of random time-variant linear filters, it is found that the RMS (root mean square) delay spread, the Doppler spread and coherence time, the coherence bandwidth, and the total received power... View full abstract»

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  • Measurements of 900 MHz propagation for microcellular communications systems design

    Publication Year: 1988, Page(s):297 - 300
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (352 KB)

    Ideal microcells have a diameter of less than 1 km, and therefore provide a higher degree of frequency reuse than a conventional system for a given area. However, to calculate the reuse capability of a microcell system and to look at problems such as hand-over, the propagation characteristics need to be known. Indoor and outdoor propagation measurements are presented with guidelines to cell design... View full abstract»

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  • The digital FSK receivers implemented by the TMS32010 signal processors

    Publication Year: 1988, Page(s):436 - 439
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (240 KB)

    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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  • Broadband communications: a key strategical issue for Europe

    Publication Year: 1988, Page(s):206 - 209
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (256 KB)

    A description is given of the RACE program, (R&D in advanced communications technologies for Europe), which is intended to provide a framework for all entities interested in a fruitful cooperation concerning the long-term future of telecommunications. RACE is intended to impact the activities of strategic planning/R&D of the European telecommunications sector. It is expected to provide a m... View full abstract»

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  • Performances of fast frequency hopping, binary frequency shift keying (FFH-BFSK) spread spectrum multiple access communications over fading channels

    Publication Year: 1988, Page(s):391 - 394
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (304 KB)

    A fast-frequency-hopping spread-spectrum multiple-access (FFH-SSMA) system with a binary frequency-shift-keying (BFSK) modulation scheme is studied. Interference from undesired users and multipath are analyzed. Improvement due to the use of equal gain diversity is studied in terms of bit error rate (BER). Expressions for the BER are evaluated when a maximum-likelihood decision criterion is used to... View full abstract»

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  • Sequential decoding algorithms for detection of severely distorted data signals

    Publication Year: 1988, Page(s):114 - 117
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (308 KB)

    An overview is presented of suboptimal sequential detection processes for the regeneration of disturbed and distorted data signals. The algorithms used are known from the theory of convolutional codes. They were transformed for intersymbol interference systems. Some algorithms are described, and the corresponding simulation results show that they are well suited for the detection of severely disto... View full abstract»

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  • Speech coding at 9.6 Kb/s and below using vector quantized transform coder

    Publication Year: 1988, Page(s):36 - 39
    Cited by:  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (292 KB)

    The vector-quantized transform coder (VQTC) is proposed as an alternative to a code-excited linear predicting (CELP) coder. The consideration of more efficient and subjectively meaningful residual quantization allows the VQTC to operate at rates as low as 6 kb/s without significant degradations in speech quality. Below 6 kb/s the quality of the speech was good and did not contain any background no... View full abstract»

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  • Traffic aspects in future low power, multi-channel trunked systems

    Publication Year: 1988, Page(s):282 - 285
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    A traffic analysis is presented for a low-power, multichannel, trunked system. A comparison between exponentially distributed and constant holding times is generated by incorporating two delay theory traffic modules, Erlang C and Grommelin-Pollaczek. The effects of queuing and time-out-timing on the system capacity and grade of service are also discussed. Four types of communication systems are in... View full abstract»

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