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Books > Professional & Technical > Electronics & communications engineering > Electronics engineering > Circuits & components
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Ultra-Wideband Pulse-based Radio - Reliable Communication over a Wideband Channel (Paperback, Softcover reprint of hardcover 1st ed. 2009)
Loot Price: R3,117
Discovery Miles 31 170
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Ultra-Wideband Pulse-based Radio - Reliable Communication over a Wideband Channel (Paperback, Softcover reprint of hardcover 1st ed. 2009)
Series: Analog Circuits and Signal Processing
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Today's booming expanse of personal wireless radio communications
is a rich source of new challenges for the designer of the
underlying enabling te- nologies. Personal communication networks
are designed from a fundam- tally different perspective than
broadcast service networks, such as radio and television. While the
focus of the latter is on reliability and user comfort, the
emphasis of personal communication devices is on throughput and
mobility. However, because the wireless channel is a shared
transmission medium with only very limited resources, a trade-off
has to be made between mobility and the number of simultaneous
users in a con?ned geographical area. Accord- 1 ing to Shannon's
theorem on channel capacity, the overall data throughput of a
communication channel bene?ts from either a linear increase of the
tra- mission bandwidth, or an (equivalent) exponential increase in
signal quality. Consequently, it is more bene?cial to think in
terms of channel bandwidth than it is to pursue a high transmission
power. All the above elements are embodied in the concept of
spatial ef?ciency. By describing the throughput of a system 2 in
terms of bits/s/Hz/m , spatial ef?ciency takes into account that
the use of a low transmission power reduces the operational range
of a radio transmission, and as such enables a higher reuse rate of
the same frequency spectrum.
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