SYNCHRONIZATION APPARATUS FOR ACCURATELY DEMODULATING SIGNAL INPUT TO PJM TAG AND PJM TAG INCLUDING THE SYNCHRONIZATION APPARATUS

A passive phase jitter modulation (PJM) tag is charged with power in a continuous wave (CW) section. When receiving a command from a reader, the passive PJM tag must recognize the command and determine exactly when to begin demodulating the command. Only then can the passive PJM tag demodulate the c...

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Bibliographic Details
Main Authors LEE DONG-HAN, BAE JI-HOON, CHOI GIL-YOUNG, YANG HOON-GEE, CHAE JONG-SUK
Format Patent
LanguageEnglish
Published 30.09.2010
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
HANDLING RECORD CARRIERS
PHYSICS
PRESENTATION OF DATA
RECOGNITION OF DATA
RECORD CARRIERS
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:A passive phase jitter modulation (PJM) tag is charged with power in a continuous wave (CW) section. When receiving a command from a reader, the passive PJM tag must recognize the command and determine exactly when to begin demodulating the command. Only then can the passive PJM tag demodulate the command. To this end, a synchronization apparatus for accurately demodulating a signal input to a PJM tag includes a plurality of correlators correlating a received phase jitter-modulated signal with a template of an internal matched filter which is in the same form as at least a portion of a modified frequency modulation (MFM) flag.
Bibliography:Application Number: US20090608862