Scheduled System Maintenance:
Some services will be unavailable Sunday, March 29th through Monday, March 30th. We apologize for the inconvenience.
By Topic

Electronics & Communication Engineering Journal

Issue 5 • Date Oct 1993

Filter Results

Displaying Results 1 - 8 of 8
  • Integrated broadband communications development and implementation strategies

    Publication Year: 1993 , Page(s): 315 - 320
    Cited by:  Papers (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (492 KB)  

    The paper summarises the consolidated results of the collaborative research within Project RACE 1044 `IBC development and implementation strategies'. It is aimed at giving a comprehensive view of R1044 activities and achievements. The results of the activities of the five R1044 workpackages are summarised. It provides a description of the role that R1044 played in phase I of the European Communities' Research and development in Advanced Communications Technologies in Europe' (RACE) programme, and describes the general objectives, organisation, and results achieved by the project View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • High-bit-rate digital subscriber lines

    Publication Year: 1993 , Page(s): 279 - 283
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (372 KB)  

    High-bit-rate digital subscriber line (HDSL) technology provides a simple, cost-effective solution for the rapid provision of a new digital telecommunication services direct to a customer's premises over existing twisted copper pair telephone lines. It makes full use of the existing network infrastructure and hence removes the need for the costly replacement of copper twisted pairs by alternative transmission media View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Electronic odour sensing systems

    Publication Year: 1993 , Page(s): 303 - 308
    Cited by:  Papers (1)  |  Patents (4)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (432 KB)  

    An odour sensing instrument has been developed and used to classify many different materials, including beers, spirits and alcohols. The next stage in development is to begin to relate subjective odour descriptors (e.g. fruity, minty) to quantitative sensor array measurements. This task is being approached using both neural network and multivariate statistical techniques. The ultimate goal is to provide a measurement standard for odours. This exciting prospect requires the integration of sensor technology, signal conditioning, data acquisition and pattern recognition View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Satellite systems in a VSAT environment

    Publication Year: 1993 , Page(s): 285 - 291
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (544 KB)  

    The next generation of satellites is discussed and a Ka-band payload is proposed which will provide mesh connectivity at high data rates (e.g. 1 Mbit/s) directly between very small aperture terminals (VSATs) using a maximum antenna diameter of 1.5 m. It is demonstrated that there are no significant differences between Ku-band and Ka-band VSAT operations apart from propagation margins, which are analysed statistically over 650 European cities. It is shown that margins required for Ka-band operation are not excessive. A Ka-band satellite payload is proposed, based on frequency division multiple access, multibeam switching with dynamically controllable transponder bandwidths and gain. The payload adapts to traffic-loading requirements in its provision of multibeam connectivity and capacity. The signal format, modulation and coding technique used for transmission is unconstrained, except in terms of bandwidth, and this will allow advances in modulation and coding to take place during the lifetime of the satellite in orbit View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Planning tools for mobile networks

    Publication Year: 1993 , Page(s): 309 - 314
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (504 KB)  

    The RACE II project PLATON (Planning Tools for third generation mobile Networks) aims at defining a set of tools to be used for radio planning of the Universal Mobile Telecommunication Systems (UMTS) network. The paper presents studies on cell structures, propagation models, the different services and the corresponding quality-of-service and shows how these are used in the planning tools, the modular structure and the evolution of the software View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The PEA (phase equalisation analyser)

    Publication Year: 1993 , Page(s): 268 - 270
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (200 KB)  

    The phase equalisation analyser is a microprocessor-based instrument which is used for measuring the phase response of sophisticated instrumentation tape recorders. This instrument adjusts the phase difference between the fundamental and third harmonic components of a complex input signal to the recorder such that the phase difference between them at the output of the recorder is zero View full abstract»

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

    Publication Year: 1993 , Page(s): 271 - 278
    Cited by:  Patents (9)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (728 KB)  

    Communications security is increasing in importance as a result of the use of electronic communications in more and more business activities. Cryptography is the only practical means to provide security services in many applications. Research into cryptography was exploded in the last 18 years and a variety of cryptographic algorithms and techniques have emerged. Cryptographic algorithms may be classified as either symmetric, if the same key is shared by the sender and receiver, or asymmetric, if they use different keys. Symmetric algorithms have been dominated by the Data Encryption Standard since 1976, but a number of replacements are now being proposed. Asymmetric, or public key, algorithms allow provision of new security services such as digital signatures. The RSA algorithm is the most widely known of these, but a recently proposed standard for digital signatures is also of intense current interest View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • I'll be seeing you: multimedia communications in the 21st century

    Publication Year: 1993 , Page(s): 293 - 302
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (764 KB)  

    The world's telecommunications network is not yet 120 years old and is the largest man-made machine of all time. The paper outlines some of the key technologies which have underpinned its development and argues that rapid technological advance, coupled with a convergence of technologies and markets in the IT sector, will create a highly competitive multimedia environment characterised by revolutionary, rather than evolutionary, change. The paper argues that a full multimedia capability, with integrated voice, text and fixed and moving image capabilities, will create major market opportunities and have a pervasive impact on all aspects of commerce and social life. Examples of multimedia services are provided and the importance of a national broadband network infrastructure to deliver them is stressed View full abstract»

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