Symbol synchronization apparatus and method of passive RFID reader
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United States of America Patent
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May 13, 2014
Grant Date -
Apr 28, 2011
app pub date -
Jul 8, 2010
filing date -
Oct 28, 2009
priority date (Note) -
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Abstract
Provided is a symbol synchronization apparatus and method of a passive RFID reader. The symbol synchronization apparatus includes: an edge clock detector generating edge clocks by detecting phase inversion positions of a received signal; a preamble detector detecting a preamble section by analyzing the generation times of the edge clocks; a symbol decision time extractor extracting a symbol decision time by averaging distances between the edge clocks consecutively generated in the preamble section, when the preamble section is detected; and a symbol decider deciding a symbol by analyzing the magnitude of the received signal, when the time reaches the symbol decision time.
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