Symmetric pilot processing for robust timing offset and frequency offset estimation in ISDB-T and ISDB-TSB receivers
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United States of America Patent
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Mar 22, 2011
Grant Date -
Oct 8, 2009
app pub date -
Apr 4, 2008
filing date -
Apr 4, 2008
priority date (Note) -
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Abstract
Timing and frequency offset processing in sub-carriers is performed in an Integrated Services Digital Broadcasting-Terrestrial (ISDB-T) receiver system. Sub-carriers are divided into two sub-sets, where the sub-sets contain an equal number of sub-carriers. Subsequently bad sub-carriers are removed, if present, from first sub-set of the sub-sets, and corresponding sub-carriers from a second sub-set of the sub-sets are also removed. Further, a phase difference on each sub-carrier from each sub-set is computed, and mean phase differences of each of the sub-sets are computed. Furthermore, frequency offset is computed by averaging the mean phase differences of the sets.
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