Fine timing acquisition
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United States of America Patent
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-
N/A
Issued Date -
Oct 5, 2006
app pub date -
Mar 8, 2006
filing date -
Mar 10, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method for synchronizing timing of a receiver to a received orthogonal frequency division multiplexing (OFDM) signal is disclosed. A first timing acquisition is performed with a first received time division multiplexed (TDM) pilot to determine a course timing estimate of the received OFDM signal. A second timing acquisition is performed with a second TDM pilot to determine a fine timing estimate for a OFDM symbol of the received OFDM signal. In the second timing acquisition, the accumulated energy of channel taps over a detection window is determined and a trailing edge of the accumulated energy curve is detected. A Fourier transform (FT) collection window location for subsequent OFDM symbols is adjusted according to the trailing edge information.
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