REFLECTIVE COMMUNICATION USING RADIO-FREQUENCY DEVICES
First Claim
1. A reflective communication system, comprising:
- a transmitter that transmits a communication signal, comprising;
a cable having a plurality of openings in different sections of said cable; and
an antenna enclosed in said cable;
said cable having a plurality of openings in different sections so that said communication signal is transmitted at a plurality of points along said plurality of openings in said cable;
a wireless communication device that receives said communication signal from said transmitter and reflectively modulates said communication signal with a data signal having a second modulation to form a reflected data signal; and
a receiver that receives said reflected data signal.
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Accused Products
Abstract
The present invention relates to a reflective communication system that allows information from wireless communication devices, such as radio-frequency identification devices (RFID), to be reflectively communicated to a receiver in lieu of using a separate communication system. A transmitter transmits a communication signal, having a carrier frequency, to the wireless communication device to provide power. The wireless communication device modulates a data signal onto the communication signal to form a reflected data signal. The wireless communication device reflects the reflected data signal directly to the receiver. In this manner, the process of communicating information from a wireless communication device is accomplished in one communication system rather than two. If the receiver also directly receives the communication signal from the transmitter, the receiver can determine the location of the wireless communication device relative to the transmitters.
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Citations
17 Claims
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1. A reflective communication system, comprising:
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a transmitter that transmits a communication signal, comprising;
a cable having a plurality of openings in different sections of said cable; and
an antenna enclosed in said cable;
said cable having a plurality of openings in different sections so that said communication signal is transmitted at a plurality of points along said plurality of openings in said cable;
a wireless communication device that receives said communication signal from said transmitter and reflectively modulates said communication signal with a data signal having a second modulation to form a reflected data signal; and
a receiver that receives said reflected data signal. - View Dependent Claims (2, 3, 4, 5, 6, 12, 13)
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7. A method of reflectively communicating a data signal from a wireless communication device using a communication signal from a transmitter as a communication medium, comprising the steps of:
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transmitting communication signals having a first modulation through a plurality of openings in a cable to a plurality of reflectors;
receiving said communication signals;
reflectively modulating said communication signals with data signals having a second modulation to form reflected data signals; and
receiving said reflected data signals at a receiver. - View Dependent Claims (8, 9, 10, 11, 14, 15)
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16. A transmitter for transmitting a communication signal, the transmitter comprising:
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a cable having a plurality of openings in different sections of said cable, so that said communication signal is transmitted at a plurality of points along said plurality of openings in said cable; and
an antenna enclosed in said cable. - View Dependent Claims (17)
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Specification