WIRELESS LOCALISATION SYSTEM

摘要

Disclosed is method of computing a round trip delay between a pair of nodes, the method comprising transmitting at least one beacon at a known transmit time from each of the nodes; measuring the times-of-arrival of the beacons at other of the nodes; and estimating a round trip delay between the nodes from the measured times-of-arrival and the transmit times; and correcting the round trip delay for either or both of a frequency offset between the nodes and relative motion between the nodes.

主权项

1. A method of estimating the location of a mobile object using a plurality of anchor nodes, the method comprising:
synchronising said plurality of anchor nodes; measuring a plurality of times-of-arrival of beacons transmitted from said object to respective said anchor nodes; and estimating the location of said object relative to said anchor nodes using said measured times-of-arrival, corrected for a propagation delay at each said anchor node.