Importance

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Abstract

A reflective communication system allows information from wireless communication devices, such as radio-frequency identification devices (RFID), to be reflectively communicated to a receiver. A transmitter at a known location transmits a communication signal to the wireless communication device. The wireless communication device modulates a data signal onto the communication signal to form a reflected data signal and reflects the reflected data signal to the receiver. The receiver receives the communication signal from the transmitter and can determine a distance between the wireless communication device and the transmitter based on data that includes a time delay between receipt of the communication signal and receipt of the reflected data signal by the receiver. The receiver can further determine the approximate location of the wireless communication device based on data that includes the known location of the transmitter and the determined distance between the wireless communication device and the transmitter.

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First Claim