Abstract: A real-time method and system for locating a mobile object or person in a tracking environment. The method includes modulating a first carrier signal with a first packet including a first set of data to obtain a modulated first signal and transmitting the first signal. The first signal contains the first packet and has a first precision and a first range within the environment. The steps of modulating and transmitting are repeated until a modulated second signal is received within a time period after the step of transmitting. The second signal contains a second packet including a second set of data and has a second precision and a second range within the environment. The second signal is demodulated to obtain the second packet. Location is determined within the environment based on the second packet.

Abstract: A real-time method and system of determining and validating location of a relocated mobile object or person in a tracking environment in which a plurality of sensors are located are provided. The method includes modulating a first carrier signal with a first packet including a first set of data to obtain a modulated first signal. The first signal contains the first packet and has a first precision and a first range within the environment. A modulated second signal is received from at least one of the sensors including the nearest sensor. The second signal contains a second packet including a second set of data and has a second precision and a second range within the environment. The method further includes determining and validating current location of the relocated tag within the environment based on a plurality of second packets.

Abstract: A real-time method and system of determining and validating location of a relocated mobile object or person in a tracking environment in which a plurality of sensors are located are provided. The method includes providing a tracking tag having storage and wearable by the person or attachable to the object. The method further includes storing a set of data related to a prior location of a relocated tag in the tracking environment in the storage. The method still further includes modulating a first carrier signal with a first packet including a first set of data to obtain a modulated first signal. The method further includes transmitting from the tag to a sensor nearest the relocated tag the first signal. The first signal contains the first packet and has a first precision and a first range within the environment. The method still further includes receiving a modulated second signal at the tag from at least one of the sensors including the nearest sensor.

Abstract: A real-time method and system for locating a mobile object or person in a tracking environment in which a plurality of sensors are located are provided. The method includes providing a tracking tag wearable by the person or attachable to the object. The method further includes modulating a first carrier signal with a first packet including a first set of data to obtain a modulated first signal. The method still further includes transmitting from the tag to a sensor nearest the tag the first signal, the first signal containing the first packet and having a first precision and a first range within the environment. The method further includes repeating the steps of modulating and transmitting until a modulated second signal is received at the tag from the nearest sensor within a time period after the step of transmitting. The second signal contains a second packet including a second set of data and has a second precision and a second range within the environment.