The Cricket Location-Support System (2000)

Published inPermalink

• Proceeding
  MobiCom ‘00 Proceedings of the 6th annual international conference on Mobile computing and networking

Online copiesPermalink

Article / Slides

SynopsisPermalink

Combination of RF and ultrasound to enable a listener to determine the distance to beacons.

LocalizationPermalink

Speed of signalsPermalink

Distance measurementPermalink

Distance between beacon and listener $d = \frac{v_rv_s\Delta t}{v_r - v_s} \approx v_s\Delta t$, where $\Delta t$ is the time difference between the receipt of RF signal and ultrasonic signal.

FeaturesPermalink

• Decentralized, and
• User privacy preserved, a listener is completely passive.