[Difinision]
Ultra-wideband (UWB, ultra-wide band, ultraband, etc.) is
a radio technology. It can be used at very low energy levels for
short-range high-bandwidth communications by using a larger
portion of the radio spectrum. This method is using pulse coded
information with sharp carrier pulses at a bunch of center frequencies
in logical connex. UWB has traditional applications in non cooperative
radar imaging. Most recent applications target sensor data collection,
precision locating and tracking applications.
[Applications]
Due to the extremely low emission levels currently allowed by
regulatory agencies, UWB systems tend to be short-range and indoors
applications. However, due to the short duration of the UWB pulses, it
is easier to engineer extremely high data rates, and data rate can be
readily traded for range by simply aggregating pulse energy per data bit
using either simple integration or by coding techniques. Conventional
OFDM technology can also be used subject to the minimum bandwidth
requirement of the regulations. High data rate UWB can enable wireless
monitors, the efficient transfer of data from digital camcorders, wireless
printing of digital pictures from a camera without the need for an intervening
personal computer, and the transfer of files among cell phone handsets and
other handheld devices like personal digital audio and video players.
UWB is used as a part of location systems and real time location systems.
The precision capabilities combined with the very low power makes it ideal
for certain radio frequency sensitive environments such as hospitals and
healthcare. Another benefit of UWB is the short broadcast time which enables
implementers of the technology to install orders of magnitude more transmitter
tags in an environment relative to competitive technologies. USA based Parco
Merged Media Corporation was the first systems developer to deploy a
commercial version of this system in a Washington, DC hospital.
New UWB Products from HITACHI[link]
Accuracy- 30cm
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