WO2000063830A3 - Data recovery system for radio frequency identification interrogator - Google Patents

Data recovery system for radio frequency identification interrogator Download PDF

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Publication number
WO2000063830A3
WO2000063830A3 PCT/US2000/010916 US0010916W WO0063830A3 WO 2000063830 A3 WO2000063830 A3 WO 2000063830A3 US 0010916 W US0010916 W US 0010916W WO 0063830 A3 WO0063830 A3 WO 0063830A3
Authority
WO
WIPO (PCT)
Prior art keywords
interrogator
data recovery
radio
radio frequency
recovery system
Prior art date
Application number
PCT/US2000/010916
Other languages
French (fr)
Other versions
WO2000063830A2 (en
Inventor
Trieu C Chieu
Li-Cheng Zai
Original Assignee
Intermec Ip Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Intermec Ip Corp filed Critical Intermec Ip Corp
Publication of WO2000063830A2 publication Critical patent/WO2000063830A2/en
Publication of WO2000063830A3 publication Critical patent/WO2000063830A3/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/75—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors
    • G01S13/751—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/82—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein continuous-type signals are transmitted
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/82—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein continuous-type signals are transmitted
    • G01S13/84—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein continuous-type signals are transmitted for distance determination by phase measurement
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
    • H04L27/2332—Demodulator circuits; Receiver circuits using non-coherent demodulation using a non-coherent carrier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/04—Speed or phase control by synchronisation signals
    • H04L7/041—Speed or phase control by synchronisation signals using special codes as synchronising signal

Abstract

An RF/ID interrogator (10) is provided for recovering a data signal from an RF/ID tag (15). The interrogator (10) includes a radio (40) having a receiver portion (40b) to receive in-phase (I) and quadrature-phase (Q) signals from the RF/ID transponder (15) transmitted at a predetermined bit-rate, and a processor (30) coupled to the radio for controlling operation of the radio in accordance with stored program instructions. In one embodiment, the interrogator (10) performs over-sampling of the data signal received from the RF/ID tag (15) in order to provide a high data recovery rate. In another embodiment, the interrogator (10) performs a selection between the I and Q signals in order to achieve optimum data recovery.
PCT/US2000/010916 1999-04-20 2000-04-19 Data recovery system for radio frequency identification interrogator WO2000063830A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/294,469 US6501807B1 (en) 1998-02-06 1999-04-20 Data recovery system for radio frequency identification interrogator
US09/294,469 1999-04-20

Publications (2)

Publication Number Publication Date
WO2000063830A2 WO2000063830A2 (en) 2000-10-26
WO2000063830A3 true WO2000063830A3 (en) 2001-02-01

Family

ID=23133575

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/010916 WO2000063830A2 (en) 1999-04-20 2000-04-19 Data recovery system for radio frequency identification interrogator

Country Status (2)

Country Link
US (1) US6501807B1 (en)
WO (1) WO2000063830A2 (en)

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Publication number Publication date
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US6501807B1 (en) 2002-12-31

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