Radio frequency identification interrogator and method of operating the same
First Claim
1. A radio frequency identification (RFID) interrogator for determining a bandwidth of a backscattering signal to be backscattered by an RFID tag, the RFID interrogator sensing a predetermined frequency band to determine whether the predetermined frequency band is occupied and determining a sensing result, and the RFID interrogator controlling the bandwidth of the backscattering signal in response to the sensing result.
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Accused Products
Abstract
A radio frequency identification (RFID) interrogator for determining a bandwidth of a backscattering signal to be backscattered by an RFID tag and a method of operating the same are provided. The RFID interrogator senses a predetermined frequency band to determine whether the predetermined frequency band has been occupied and determines a sensing result. The RFID interrogator further controls the bandwidth of the backscattering signal in response to the sensing result.
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Citations
14 Claims
- 1. A radio frequency identification (RFID) interrogator for determining a bandwidth of a backscattering signal to be backscattered by an RFID tag, the RFID interrogator sensing a predetermined frequency band to determine whether the predetermined frequency band is occupied and determining a sensing result, and the RFID interrogator controlling the bandwidth of the backscattering signal in response to the sensing result.
- 9. A radio frequency identification (RFID) interrogator for determining a bandwidth of a backscattering signal to be backscattered by an RFID tag, the RFID interrogator sensing a predetermined frequency band to determine whether the predetermined frequency band is occupied, the RFID interrogator controlling the bandwidth of the backscattering signal to include at least part of the predetermined frequency band or to preclude the predetermined frequency band based on a sensing result.
- 12. A radio frequency identification (RFID) interrogator for determining a bandwidth of a backscattering signal to be backscattered by an RFID tag, the RFID interrogator sensing a bandwidth adjacent a current bandwidth of the backscattering signal to determine whether the adjacent bandwidth has been occupied based on information about the current bandwidth of the backscattering signal, and the RFID interrogator maintaining or changing the current bandwidth of the backscattering signal based on a sensing result.
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14-22. -22. (canceled)
Specification