Apparatus and method for estimating timing offset of OFDM symbol, and method of recovering symbol timing of OFDM symbol
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United States of America Patent
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Sep 7, 2010
Grant Date -
Jul 31, 2008
app pub date -
Jan 31, 2007
filing date -
Jan 31, 2007
priority date (Note) -
Expired
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Abstract
An apparatus for estimating a timing offset of each of orthogonal frequency division multiplexing (OFDM) symbols that are fast Fourier transform (FFT)-processed. A first correlator calculates correlation values and outputs a first correlation signal. A second correlator calculates correlation values and outputs a second correlation signal. A third correlator calculates a correlation value and outputs a third correlation signal. A delay correlator calculates a correlation value and outputs a timing offset information signal. A phase estimator detects phase components of the timing offset information signal and a sliding integrator accumulates the detected phase components of the timing offset information signal during a symbol interval and outputs an average value of the accumulated phase components during the symbol interval as the timing offset of each OFDM symbol.
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