Patent ID: 8416072
Filing Date: 2013-04-09
Classification: G01S,G06K,G06Q

Abstract:
1. A real-time method of locating a mobile object or person in a tracking environment while conserving electrical energy in a battery-operated tracking tag associated with the object or person, the method comprising: modulating a first carrier signal with a first packet including a first set of identification data having a first length to obtain a first modulated signal, the first set of data identifying the tag associated with the object or person; transmitting the first modulated signal containing the first packet, transmission of the first modulated signal consuming a first amount of electrical energy, the first modulated signal having a first precision and a first range within the environment; modulating a second carrier signal with a second packet including a second set of identification data reduced in length from and based on the first set of identification data; transmitting the second modulated signal containing the second packet, transmission of the second modulated signal consuming an amount of electrical energy reduced from an amount of electrical energy consumed if the second set of identification data was not reduced in length; receiving and demodulating the first and second modulated signals to obtain the first and second packets; and processing the first and second packets of the received demodulated signals to obtain location of the tag within the tracking environment wherein total transmission energy is reduced.