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Wireless Infrared Communications (Hardcover, 1994 ed.)
Loot Price: R2,894
Discovery Miles 28 940
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Wireless Infrared Communications (Hardcover, 1994 ed.)
Series: The Springer International Series in Engineering and Computer Science, 280
Expected to ship within 10 - 15 working days
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The demand for wireless access to network services is growing in
virtually all communications and computing applications. Once
accustomed to unteathered opera tion, users resent being tied to a
desk or a fixed location, but will endure it when there is some
substantial benefit, such as higher resolution or bandwidth. Recent
technolog ical advances, however, such as the scaling of VLSI, the
development of low-power circuit design techniques and
architectures, increasing battery energy capacity, and advanced
displays, are rapidly improving the capabilities of wireless
devices. Many of the technological advances contributing to this
revolution pertain to the wireless medium itself. There are two
viable media: radio and optical. In radio, spread-spectrum
techniques allow different users and services to coexist in the
same bandwidth, and new microwave frequencies with plentiful
bandwidth become viable as the speed of the supporting low-cost
electronics increases. Radio has the advantage of being available
ubiquitously indoors and outdoors, with the possibility of a seam
less system infrastructure that allows users to move between the
two. There are unan swered (but likely to be benign) biological
effects of microwave radiation at higher power densities. Optical
communications is enhanced by advances in photonic devices, such as
semiconductor lasers and detectors. Optical is primarily an indoor
technology - where it need not compete with sunlight - and offers
advantages such as the immediate availability of a broad bandwidth
without the need for regulatory approval."
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