WALRUS: wireless acoustic location with room-level resolution using ultrasound

  title={WALRUS: wireless acoustic location with room-level resolution using ultrasound},
  author={Gaetano Borriello and Alan King Lun Liu and Tony Offer and Christopher Palistrant and Richard Sharp},
In this paper, we propose a system that uses the wireless networking and microphone interfaces of mobile devices to determine location to room-level accuracy. The wireless network provides a synchronizing pulse along with information about the room. This is accompanied by an ultrasound beacon that allows us to resolve locations to the confines of a physical room (since audio is mostly bounded by walls). We generate the wireless data and ultrasound pulses from the existing PCs in each room; a… CONTINUE READING
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The Anatomy of a Context-Aware Application, 5 ACM International Conference on Mobile Computing and Networking (Mobicom99)

  • A. Harter
  • 1999
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