RFID systems and methods employing infrared localization
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United States of America Patent
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Apr 13, 2010
Grant Date -
May 7, 2009
app pub date -
Jan 9, 2009
filing date -
Apr 26, 2005
priority date (Note) -
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Abstract
A series of radio frequency identification (RFID) systems are delineated. An RFID system comprises an RFID signpost having a transmitter for transmitting signals of a predefined type, and a receiver for receiving signals of the predefined type, wherein the transmitter for transmitting signals of the predefined type cannot transmit until a determination is made that the predefined type of signal is not present at the receiver. Another RFID system comprises an RFID signpost including a transmitter having a continuous power dissipation rating, and a processor for controlling the transmitter such that peak pulse power of a transmission from the transmitter multiplied by its duty cycle does not exceed the continuous power dissipation rating for the transmitter.
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