System and method of super synchronization in RTLS

摘要

System and method for wireless infrared-aided location, including: a portable tag to be located, the portable tag comprising an infrared (IR) receiver; and a plurality of base-stations, at least one of said base-stations comprising: a processor coupled to a memory; a first clock coupled to the processor, the first clock configured to be selectively activated and deactivated by the processor; a receiver coupled to the processor, the receiver configured to receive a periodic timing synchronization signal; and an infrared transmitter coupled to the processor, the infrared transmitter configured to transmit an IR signal to the portable tag, wherein the IR signal is substantially identical and in-phase with IR signals from other base-stations, wherein the processor is configured to synchronize said base-station to the periodic timing synchronization signal.

主权项

1. A wireless infrared-aided location system, comprising:
a portable tag to be located, the portable tag comprising an infrared (IR) receiver; and a plurality of infrared (IR) base-stations, at least two of said IR base-stations comprising:
a processor coupled to a memory;a first clock coupled to the processor, the first clock configured to be selectively activated and deactivated by the processor;a second clock coupled to the processor, the second clock having a relatively lower rate than a rate of the first clock, wherein the processor is configured to operate from the second clock when the first clock is inactive;a receiver coupled to the processor, the receiver configured to receive a timing synchronization signal; andan infrared transmitter coupled to the processor, the infrared transmitter configured to transmit an IR signal to the portable tag, wherein the IR signal is substantially identical and in-phase with IR signals from other IR base-stations, wherein the processor is configured to synchronize said IR base-station to the timing synchronization signal.