Ultra wideband radio frequency identification techniques
First Claim
Patent Images
1. An apparatus, comprising:
- a transmitter portion configured to generate an ultra wideband (UWB) impulse radio (IR) interrogation signal; and
a receiver portion configured to receive a UWB IR reply signal from a radio frequency identification (RFID) tag in response to the interrogation signal;
said transmitter portion transmitting a plurality of UWB IR clock pulses that are used to guide the RFID tag to use a UWB IR clock recovery module to send information back to the receiver portion.
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Abstract
Ultra wideband (UWB) techniques are applied to radio frequency identification (RFID). For instance, a reader generates a UWB IR interrogation signal, and receives a UWB IR reply signal from an RFID tag in response to the interrogation signal. In addition, the reader may generate from the UWB IR reply signal a baseband response sequence. This sequence includes at least a tag identifier. A reader may store at least a tag identifier. Upon receipt of a UWB IR interrogation signal, the tag obtains a plurality of clock pulses from the UWB IR interrogation signal. Based on the plurality of clock pulses, the reader transmits at least the tag identifier in a UWB IR response signal.
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Citations
31 Claims
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1. An apparatus, comprising:
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a transmitter portion configured to generate an ultra wideband (UWB) impulse radio (IR) interrogation signal; and a receiver portion configured to receive a UWB IR reply signal from a radio frequency identification (RFID) tag in response to the interrogation signal; said transmitter portion transmitting a plurality of UWB IR clock pulses that are used to guide the RFID tag to use a UWB IR clock recovery module to send information back to the receiver portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A tag, comprising:
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an antenna configured to receive an ultra wideband (UWB) impulse radio (IR) interrogation signal; a memory that stores at least a tag identifier; a clock recovery module including a UWB IR receiver, configured obtain a plurality of clock pulses from the UWB IR interrogation signal; and an antenna modulator configured to transmit at least the tag identifier through backscatter modulation of the UWB IR interrogation signal, wherein the timing of the backscatter modulation is based on the plurality of clock pulses. - View Dependent Claims (13, 14)
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15. A tag, comprising:
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an antenna configured to receive an ultra wideband (UWB) impulse radio (IR) interrogation signal; a memory that stores at least a tag identifier; a clock recovery module including a UWB IR receiver, configured obtain a plurality of clock pulses from the UWB IR interrogation signal; an antenna modulator configured to transmit at least the tag identifier through backscatter modulation of the UWB IR interrogation signal, wherein the timing of the backscatter modulation is based on the plurality of clock pulses; and a power module configured to obtain operational power from signals transmitted by a remote wireless communications device.
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16. A tag, comprising:
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an antenna configured to receive an ultra wideband (UWB) impulse radio (IR) interrogation signal; a memory that stores at least a tag identifier; a clock recovery module configured obtain a plurality of clock pulses from the UWB IR interrogation signal; and a UWB IR transmitter to transmit at least the tag identifier in response to the UWB IR interrogation signal. - View Dependent Claims (17, 18)
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19. A method, comprising:
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(a) generating an ultra wideband (UWB) impulse radio (IR) interrogation signal; and (b) receiving a UWB IR reply signal from a radio frequency identification (RFID) tag in response to the interrogation signal; said generating including transmitting a plurality of UWB IR clock pulses that are used to guide the RFID tag to use a UWB IR clock recovery module to send back said reply signal. - View Dependent Claims (20, 21, 22, 23)
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24. A method, comprising:
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(a) storing at least a tag identifier; (b) receiving an ultra wideband (UWB) impulse radio (IR) interrogation signal; (c) obtaining a plurality of clock pulses from the UWB IR interrogation signal using a clock recovery module including a UWB IR receiver; and (d) transmitting at least the tag identifier in a UWB IR response signal. - View Dependent Claims (25, 26, 27, 28)
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29. A method, comprising:
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(a) storing at least a tag identifier; (b) receiving an ultra wideband (UWB) impulse radio (IR) interrogation signal; (c) obtaining a plurality of clock pulses from the UWB IR interrogation signal using a clock recovery module including a UWB IR receiver; (d) transmitting at least the tag identifier in a UWB IR response signal; and (e) obtaining operational power from signals transmitted by a remote wireless communications device.
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30. A computer program product comprising a computer useable medium having computer program logic recorded thereon for enabling a processor in a computer system to interrogate one or more tags, the computer program logic comprising:
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program code for enabling the processor to cause generation of an ultra wideband (UWB) impulse radio (IR) interrogation signal; and program code for enabling the processor to receive a response sequence, wherein the response sequence is based on a UWB IR reply signal from a radio frequency identification (RFID) tag in response to the interrogation signal; wherein said generation includes transmitting a plurality of UWB IR clock pulses that are used to guide the RFID tag to use a UWB IR clock recovery module to send back said reply signal.
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31. A computer program product comprising a computer useable medium having computer program logic recorded thereon for enabling a processor in a computer system to process interrogation signals, the computer program logic comprising:
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program code for enabling the processor to store at least a tag identifier; program code for enabling the processor to obtain a plurality of clock pulses from an ultra wideband (UWB) impulse radio (IR) interrogation signal using a clock recovery module including a UWB IR receiver; and program code for enabling the processor to cause transmission of at least the tag identifier in a UWB IR response signal.
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Specification