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Reply #3: UWB would use all of the cell phone bandwidth [View All]

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Mosby Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Nov-16-11 04:26 PM
Response to Reply #2
3. UWB would use all of the cell phone bandwidth
There are problems of course:

Ultra-wideband (UWB) <1>, <2>, <3>, <4> represents a new
paradigm in wireless communication. The unprecedented radio
bandwidth provides advantages such as immunity from flat
fading. Two primary challenges exist: (1) how to collect
energy over the rich multipath components; (2) extremely
high sampling rate analog to digital conversion (A/D). Time
reversal <5> provides a promising solution to the first problem
<6>. In particular, the concept of time reversal has recently
demonstrated in a real-time hardware test-bed <7>, <8>. At the
heart of time reversal, the channel itself is exploited as a part
of the transceiver. This idea makes sense since when few
movements exist, the channel is time-invariant and reciprocal
<9>. In principle, most of the processing at the receiver can
be moved to the transmitterwhere energy consumption and
computation are sufficient for many advanced algorithms.

http://dsp.rice.edu/sites/dsp.rice.edu/files/cs/CS_Base...
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