Frequency offset estimation method and associated apparatus applied to multi-carrier communication system
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United States of America Patent
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Aug 11, 2015
Grant Date -
Apr 3, 2014
app pub date -
Sep 26, 2013
filing date -
Sep 28, 2012
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Abstract
A frequency offset estimation method for a multi-carrier communication system is provided. The method includes: transforming a representation of a reception signal from a time domain to a frequency domain, and generating a plurality of symbols; calculating a correlation of two symbols among the symbols, and obtaining a plurality of correlating complex numbers corresponding to a plurality of subcarriers; generating M number of candidate subcarrier position sets according to a subcarrier position set of a specific signal and M number of candidate frequency offsets; calculating M number of calculated values according to the correlating complex numbers corresponding to the M number of candidate subcarrier position sets; and determining a frequency offset according to the maximum calculated value among the M number of calculated values.
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