Radio frequency data communications device
First Claim
Patent Images
1. A method of wireless communication, the method comprising:
- transmitting, from an interrogator, command information using both spread spectrum and amplitude shift keying;
processing, via a radio frequency identification tag, at least a portion of the command information;
generating, via the tag, a random number;
transmitting, from the tag, reply information including the random number and identification information stored in the tag; and
determining, via the interrogator, if a collision occurred upon receiving the reply information.
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Abstract
A radio frequency identification device includes an integrated circuit including a receiver, a transmitter, and a microprocessor. The receiver and transmitter together define an active transponder. The integrated circuit is preferably a monolithic single die integrated circuit including the receiver, the transmitter, and the microprocessor. Because the device includes an active transponder, instead of a transponder which relies on magnetic coupling for power, the device has a much greater range.
106 Citations
1 Claim
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1. A method of wireless communication, the method comprising:
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transmitting, from an interrogator, command information using both spread spectrum and amplitude shift keying;
processing, via a radio frequency identification tag, at least a portion of the command information;
generating, via the tag, a random number;
transmitting, from the tag, reply information including the random number and identification information stored in the tag; and
determining, via the interrogator, if a collision occurred upon receiving the reply information.
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Specification