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    11.
    发明专利
    未知

    公开(公告)号：DE69720170T2

    公开(公告)日：2003-12-18

    申请号：DE69720170

    申请日：1997-12-16

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： SHOBER ANTHONY R ,  WRIGHT GREGORY ALAN ,  SWEETMAN ERIC

    IPC: H04B5/02 ,  G01S13/75 ,  G06K19/07 ,  H04B1/59 ,  H04B7/26

    Abstract: The present invention provides for an inexpensive RFID Tag design which uses an inexpensive Backscatter Modulator. The modulator is simply a CMOS gate (202) driven by a shift register (203) containing a modulating signal. The CMOS gate is connected to the antenna (201) such that it modulates the reflectivity of the antenna in accordance with the modulating signal. In a second embodiment, the Tag is incorporated into a single CMOS integrated circuit which comprises all of the components, except for the antenna, necessary to implement an inexpensive read-only RFID Tag.

    PASSENGER, BAGGAGE, AND CARGO RECONCILIATION SYSTEM
    14.
    发明专利
    PASSENGER, BAGGAGE, AND CARGO RECONCILIATION SYSTEM 未知

    公开(公告)号：CA2218805A1

    公开(公告)日：1998-06-30

    申请号：CA2218805

    申请日：1997-10-21

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： SHOBER R ANTHONY ,  SMITHGALL DAVID HARRY ,  WRIGHT GREGORY ALAN ,  MACLELLAN JOHN AUSTIN

    IPC: H04B5/02 ,  G06K7/00 ,  G07B15/04 ,  G07C9/02 ,  H04B1/59 ,  H04B7/26 ,  G01S13/74

    Abstract: In accordance with the present invention, a radio frequency identification system, using modulated backscatter radio communications, is disclosed which supports the automated reconciliation of passengers, baggage, an d cargo on a transport. A baggage tag is attached to each piece of checked baggage , where the baggage tag is a read-only tag with modulated backscatter radio capabi lity. Thus, each piece of checked baggage can be identified for sortation, and also identified to ascertain if it has been loaded onto a particular aircraft. Pieces of baggage can be either loaded directly onto an aircraft, or loaded onto a cargo container; where a cargo tag is attached to the cargo container, the cargo tag i s a read-write tag with modulated backscatter radio capability. The aircraft itself may be equipped with aircraft tags, which could be read-only or read-write tags with modulated backscatter radio capability. Aircraft tags allow a positive associati on between the identity of the baggage or cargo container being loaded, the aircraf t on which it is being loaded, and the cargo bay doorway through which it is being loaded. To identify passengers, several alternatives are disclosed. In one embodiment, a magnetic boarding pass can be used with a magnetic stripe containi ng information about this passenger. In this embodiment, the passenger is responsib le for inserting the magnetic boarding pass into a magnetic card reader as the pass enger boards the flight. In another embodiment, a radio boarding pass could be used. T he radio boarding pass resembles a conventional boarding pass, however it has readonly modulated backscatter radio capability, perhaps identical with the technology used for the baggage tag. The radio boarding pass can be read as the passenger boards the aircraft. In an alternate embodiment, the passenger can have a passen ger card, which is a read-write tag with modulated backscatter capability. The passe nger card can be read as the passenger boards the aircraft, to identify the passenger . Alternately, the passenger card can be used for a number of enhanced passenger service applications in a generalized transportation environment.

    15.
    发明专利
    未知

    公开(公告)号：DE69720170D1

    公开(公告)日：2003-04-30

    申请号：DE69720170

    申请日：1997-12-16

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： SHOBER ANTHONY R ,  WRIGHT GREGORY ALAN ,  SWEETMAN ERIC

    IPC: H04B5/02 ,  G01S13/75 ,  G06K19/07 ,  H04B1/59 ,  H04B7/26

    Abstract: The present invention provides for an inexpensive RFID Tag design which uses an inexpensive Backscatter Modulator. The modulator is simply a CMOS gate (202) driven by a shift register (203) containing a modulating signal. The CMOS gate is connected to the antenna (201) such that it modulates the reflectivity of the antenna in accordance with the modulating signal. In a second embodiment, the Tag is incorporated into a single CMOS integrated circuit which comprises all of the components, except for the antenna, necessary to implement an inexpensive read-only RFID Tag.

    SUBCARRIER FREQUENCY DIVISION MULTIPLEXING OF MODULATED BACKSCATTER SIGNALS
    18.
    发明专利
    SUBCARRIER FREQUENCY DIVISION MULTIPLEXING OF MODULATED BACKSCATTER SIGNALS 未知

    公开(公告)号：CA2219268A1

    公开(公告)日：1998-06-30

    申请号：CA2219268

    申请日：1997-10-23

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： WRIGHT GREGORY ALAN ,  MACLELLAN JOHN AUSTIN ,  SHOBER R ANTHONY

    IPC: H04B1/59 ,  H04B7/22 ,  H04B14/08

    Abstract: In accordance with the present invention, the communication system comprises an Interrogator and one or more Tags. The Interrogator generates a modulated carrier signal by modulated a first information signal onto a radio si gnal. The Interrogator transmits a downlink signal which comprises the modulated carri er signal and the radio signal. A Tag receives and processes the downlink signal. Specifically, the Tag demodulates the first information signal from the modulate d carrier signal and generates a second information signal typically based on the contents of the first information signal. The second information signal is used to modulate a subcarrier signal, thereby generating a modulated subcarrier signal. A Backscatter Modulator using this modulated subcarrier signal modulates the reflection of the radio signal, wherein the reflected signal is an uplink signal . The Interrogator receives and demodulates the uplink signal using homodyne detection to obtain the modulated subcarrier signal, which is then demodulated using a subcar rier demodulator to obtain the second information signal. In one embodiment, frequenc y of the subcarrier signal is an integer multiple of the second information signal symbol rate and is up to half the sampling rate of the subcarrier demodulator.

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