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Electronics & Communication Engineering Journal

Issue 5 • Date Oct 1999

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Displaying Results 1 - 4 of 4
  • Modelling the land mobile satellite channel: a review

    Publication Year: 1999 , Page(s): 235 - 248
    Cited by:  Papers (7)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1052 KB)  

    The use of satellite systems in the implementation of third-generation mobile communication systems obviously involves a propagation environment for the signal different from that in the conventional terrestrial first- and second-generation systems. The propagation conditions and phenomena met with are embraced by the expression `land mobile satellite (LMS) channel'. This paper reviews the studies of the LMS channel reported in the literature. The various models are classified and compared in such a way that their similarities and differences are apparent View full abstract»

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  • The TV on the wall: has its time come?

    Publication Year: 1999 , Page(s): 210 - 216
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (764 KB)  

    For many decades television engineers have dreamt of `the TV on the wall'. The display engineer has always answered, `maybe in about ten years time'. However now, for the first time, there is more than one technology offering a real possibility that the large, thin, flat television display will become a reality. There are three flat-panel technologies to consider: active matrix liquid crystal, plasma-addressed liquid crystal and plasma display panels. Television receivers utilising each of these approaches are appearing on the consumer market or are promised in the near future, albeit at a high price and in small quantities. The viability of high-definition TV (HDTV) is considered by some to be crucially dependent on the development of such displays and their promise for this application is considered. This paper reviews the key features of the three approaches and compares and contrasts their particular advantages and disadvantages for television applications. Finally, an attempt is made to answer the question posed by the title of the paper View full abstract»

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  • Applications of imaging radar data in Earth science investigations

    Publication Year: 1999 , Page(s): 227 - 234
    Cited by:  Papers (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (700 KB)  

    Synthetic aperture radar (SAR) data provide unique information about the Earth's surface and biodiversity, including critical data for natural hazards and resource assessments. The ability to calculate the cross-section of a scatterer for any transmit and receive polarisation combination provides detailed information about vegetation for assessing changes in land cover, biomass and forest regrowth. Unique SAR interferometric measurements, predominantly large-scale surface change at fine resolution, are used to generate topographic data sets, monitor surface topographic change, and measure glacier ice velocity. The LightSAR mission, planned for launch in 2002 will be optimised for polarimetric and interferometric data acquisition in order to provide long-term observations of the Earth's changing conditions View full abstract»

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  • PCB design techniques for lowest-cost EMC compliance. 2

    Publication Year: 1999 , Page(s): 218 - 226
    Cited by:  Papers (1)  |  Patents (3)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (684 KB)  

    For pt.1 see ibid., vol.8, no. 4, p.185-94 (1999). Printed circuit boards (PCBs) are widely used in electronic equipment and systems. Application of good EMC (electromagnetic compatibility) practices to their design usually helps to achieve compliance with EMC regulations at much lower cost than alternative EMC measures at higher levels of integration, and also improves signal integrity. This paper discusses in detail techniques for improving the power supply of a PCB and using transmission lines View full abstract»

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