Patent ID: 11879967
Assignee: BLUECATS AUSTRALIA PTY LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A system for locating and/or tracking a passive object in a monitored area, said system comprising:
at least three ultra wide band (UWB) transceivers designed to track active radio frequency tags and a computing device in communication said at least three UWB transceivers
wherein:
the at least three UWB transceivers are configured to form at least two distinct pairs of UWB transceivers with each pair comprising a first UWB transceiver and a second UWB transceiver;
each first UWB transceiver in each pair is configured to transmit UWB pulses comprising a preamble code to each second UWB transceiver;
each second UWB transceiver in each pair is configured to receive the transmitted direct line of sight UWB pulses from each first UWB transceiver and UWB pulses reflected from the passive object in the monitored area;
each second UWB transceiver in each pair is configured to store channel impulse response (CIR) data obtained from both the direct line of sight pulses and the pulses reflected from the passive object and to transfer stored CIR data to the computing device;
the computing device comprises coded instructions directing the computing device to receive the CIR data transferred from each second UWB transceiver and process said CIR by using said preamble code to identify said CIR data from reflected pulses and using a time delay between the time of flight of said preamble code received by direct line of sight and the time of flight of reflected pulses to calculate a distance from the first UWB transceiver to the passive object and to the second UWB transceiver; and
the computing device comprises coded instructions for implementing a tracking algorithm and/or a radar imaging algorithm to identify, track or classify the passive object or to generate a radar image of the passive object.