By Topic

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

13-17 June 1988

Filter Results

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
    Request permission for commercial reuse | PDF file iconPDF (472 KB)
    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»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 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»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 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»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Adaptive algorithms for digital signal processing

    Publication Year: 1988, Page(s):98 - 101
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    A comparison is made of three characteristic algorithms for adaptive signal processing in ISDN (integrated-services digital network) user interfaces: a fast RLS (recursive least squares) algorithm with transversal FIR (finite impulse response) structure, an LMS (least mean squares) algorithm with transversal FIR structure, and a sign algorithm with memory filter structure. The algorithms are compa... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 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»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • New recursive structures for echo cancellation

    Publication Year: 1988, Page(s):89 - 92
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    The authors present two recursive structures for adaptive signal processing. They show, by computer simulation of echo cancellers for baseband data transmission, that the proposed structures can have a better performance than conventional IIR (infinite impulse response) and FIR (finite impulse response) structures if the poles are not too near the unit circle. The authors have restricted the resul... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 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»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 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»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 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»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • RNS approach to adaptive Burg algorithm

    Publication Year: 1988, Page(s):130 - 133
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB)

    Digital signal processing using the residue number system (RNS) is an area of renewed and growing research interest. A basic difficulty is the division required by most of the adaptive algorithms. The authors propose a method to implement a unified RNS architecture for both product and general division. The architecture of a whole RNS Burg cell and the layout of the main blocks in a 1.5 μm p-we... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On the bit synchronization in digital communication systems using partial response signalling

    Publication Year: 1988, Page(s):76 - 79
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    An analysis of the symbol synchronization problem in digital communication systems using partial response signalling is presented. A series of approximations of the maximum-likelihood function, leading to the discrete symbol timing loop realizations are presented and discussed. Numerical analysis of the phase error discriminator characteristic for different configurations of the symbol synchronize... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The performance of adaptive interference suppression filters used in PN spread-spectrum systems

    Publication Year: 1988, Page(s):126 - 129
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    The performance of the optimal and adaptive interference suppression filters in pseudonoise spread spectrum systems has been determined by simulation. The performance index is the factor which represents the improvement in the signal-to-noise ratio due to the use of the interference suppression filter. The simulations include the linear M-step prediction and interpolation filters and some... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Comparison of 16-ary DEQAM and 16-ary DEPSK signallings for spectrally efficient transmission over satellite links

    Publication Year: 1988, Page(s):72 - 75
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    A comparative study is presented of a 16-ary differentially encoded quadrature-amplitude-modulation (DEQAM) and 16-ary differentially encoded phase-shift keying (DEPSK) transmission through a nonlinear satellite channel in the presence of additive white Gaussian noise (AWGN) and adjacent channel interference (ACI). It is assumed that the high-power amplifier of each earth station introduces both A... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Integration of two telecommunication services: mobile radio and rural subscriber radio

    Publication Year: 1988, Page(s):322 - 325
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    A novel approach is used to integrate two traditionally different services, namely, mobile radio and rural subscriber radio. The proposed integrated rural system (IRS) will offer telephone service to subscribers along highways and in the sparsely populated areas around them. The similarities and differences between the two services are discussed. The IRS system is described in terms of feasibility... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • ISDN services

    Publication Year: 1988, Page(s):444 - 447
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    The author outlines the strategy for and structure of international recommendations relating to basic and supplementary services in an ISDN (integrated-services digital network). The studies performed by CCITT are outlined, and relationship with the work of other international standardization bodies is included. The principles of telecommunication services supported by an ISDN are discussed. Beare... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Comparison of receiver structures for digital radio transmission over dually polarized fading channels

    Publication Year: 1988, Page(s):122 - 125
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    The author presents the performance of different receiver structures with an equalizer and a cross-polarization interference canceller used together to overcome previous imperfections. A dually polarized propagation channel model is presented, the receivers are described, and their theoretical and dynamic simulated performance is examined. Selected receiver structures are compared for several para... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A new class of modulation schemes with variable envelope

    Publication Year: 1988, Page(s):68 - 71
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    A novel class of linear modulation schemes is proposed. Excellent spectral efficiency is achieved only at the expense of a small envelope fluctuation in the transmitted signal. Extensive computer simulations have been carried out which show that for noncoherent limited-discriminator (LD) detection the three-phase scheme presented performs better than MSK (minimum-shift keying). A Viterbi detector ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 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»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 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»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 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»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 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»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Standardization in Europe-overview of scenario

    Publication Year: 1988, Page(s):442 - 443
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (116 KB)

    Selection and standardization of network services, as well as standardization of interfaces between various parts of the networks, are considered. The various bodies involved in setting European standards in telecommunications and information technology are described. European standards for ISDN (integrated-services digital network) and standards for the Pan-European mobile communication system ar... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Simulation results for an 8-PSK Viterbi receiver

    Publication Year: 1988, Page(s):118 - 121
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    A receiver model for 8-PSK has been simulated. The model has been evaluated for two types of Viterbi decoders, with 8 and 64 states, respectively. The channel considered is a two-ray model with nearly the same ray amplitudes (1 dB difference) and Gaussian white noise added at the input of the receiver. In both cases the symbol error rates for zero multipath delay are comparable to the error rate o... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • New basis functions for sinusoidal decompositions

    Publication Year: 1988, Page(s):48 - 51
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    A set of basis functions for unvoiced frames that incorporate some knowledge about the peripheral auditory system and speech perception is presented. The basis functions are sinusoids modulated by stochastic signals and are called narrowband basis functions, since their energy remains concentrated in the vicinity of the centre frequency of each sinusoid. The use of these narrowband functions to mo... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.