Quasi-pilot symbol substitution
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United States of America Patent
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Apr 17, 2012
Grant Date -
Jun 26, 2008
app pub date -
Mar 29, 2005
filing date -
Mar 29, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
To improve the reliability of channel estimation, data symbols at determined positions of the transmitted data stream are replaced by quasi-pilot symbols. The quasi-pilot symbols carry data modulated onto the carrier with a different modulation scheme than the original symbols. The modulation scheme for the quasi-pilot symbols has a lower amplitude and/or phase ambiguity than the modulation scheme for the original data symbol.
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