Ultra Wideband (UWB) Ultra-Wideband (UWB)
Short Range Location technologies
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Emmanuel Etchu 28-Apr-2010
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Wh t i UWB What is UWB
UWB is a radio technology that modulates
UWB is a radio technology that modulates impulse based waveforms instead of
continuous carrier waves continuous carrier waves
very low power.
Synonyms:
Non sinusoidal Communication Technology
Impulse Radio
Baseband Pulse Technology
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gy
R l d S d d Related Standards
IEEE 802.15 : Wireless Personal Area Network (WPAN)
IEEE 802.15.1 : Bluetooth, 1Mbps
IEEE 802.15.3 : WPAN/high rate, 50Mbps
IEEE 802.15.3a: WPAN/Higher rate, 200Mbps, UWB
IEEE 802.15.4 : WPAN/low-rate, low-power, mW level, 200kbps
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UWB and NB Communication.
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Main Principle Main Principle
UWB FINGERPRINTING Problems:
UWB FINGERPRINTING
UWB fingerprinting is well
Problems:
Fingerprint database may need to be updated
UWB fingerprinting is well suited to sensor localization applications in static indoor environments
p
frequently due to the changing environment / channel conditions
environments. channel conditions
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Positioning from TOA Positioning from TOA
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Time Difference Of Arrival (TDOA) & One Way Ranging (OWR)
(OWR)
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P iti i f TDOA Positioning from TDOA
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Received Signal Strength Indicator (RSSI) Received Signal Strength Indicator (RSSI)
Advantages Disadvantages
Advantages
Power Strength could be an alternative solution to
Disadvantages
• RSSI requires precise channel behavioral model TOA/TDOA in the UWB
Context
• RSSI is sensitive to Channel inconstance and non-
stationarity
• Lower requirements in terms of synchronization and clock precision
stationarity
• RSSI does not benefit from UWB high resolutiong
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Angle Of Arrival (AOA )
Angle Of Arrival (AOA )
Advantages Disadvantages
Advantages
AOA could be an
alternative solution to
Disadvantages
• UWB Arrays Antennas technology may be not
alternative solution to TOA/TDOA in the UWB Context
gy y
mature
• AOA requires precise
calibration at anchor nodes
• Lower requirements in terms of synchronization
calibration at anchor nodes
• Cost increases with size and size may not be
and clock precision
• Two anchors are sufficient f 2D iti i
y reduced
• The number of elements in the array highly depends on for 2D-positioning the array highly depends on
the radio environment
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Common applications
• Intensive Care Unit monitoring using UWB
• Demo:
• http://www.youtube.com/watch?v=1 HOuStEPVqo&feature=related
The UWB Scanning System is a human
Company Confidential
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HOuStEPVqo&feature related The UWB Scanning System is a human
detection radar
Company Confidential
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References
http://www.intel.com/technology/comms/uwb/index.htm
http://www.cse.wustl.edu/~jain/cse574-08/ftp/uwb/index.html http://www.uwbforum.org/
http://www.youtube.com/watch?v=1HOuStEPVqo&feature=relat ed
ed
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