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SUMMARY:Multipath? What multipath? Positioning and communication using low
  frequency magneto-induction - Andrew Markham (University of Oxford)
DTSTART:20130306T130000Z
DTEND:20130306T140000Z
UID:TALK43215@talks.cam.ac.uk
CONTACT:Eiko Yoneki
DESCRIPTION:There are many positioning technologies that operate using hig
 h frequency radio signals\, such as GPS\, WiFi and UWB. Due to the radio-c
 omplex environment in which they operate and the short wavelength\, radio 
 propagation is typically subject to multipath\, scattering and absorption.
  This in turns leads to ever more sophisticated algorithms to mitigate the
  effects of the disturbance. In this talk\, I will discuss a fresh approac
 h to positioning and communication using low frequency ( < 100 kHz) magnet
 ic fields. By measuring the vector field\, our technique has the unique ab
 ility of being able to position in 3-D using a single transmitter and sing
 le receiver\, unlike traditional trilateration approaches which typically 
 require at least four spatially separate transmitters. Operating in the ne
 ar-field\, there is no possibility for multipath to occur\, resulting in a
 ccurate and low noise positioning. In addition\, low frequency fields have
  the ability to penetrate soil\, rock and water with minimal attenuation\,
  opening up the possibility of localizing in challenging environments such
  as underground or indoors. I will discuss some of the techniques and algo
 rithms we are currently developing and present some recent results\, as we
 ll as highlight challenges in using low frequency fields.
LOCATION:LT2\, Computer Laboratory\, William Gates Builiding
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