Invention Application
- Patent Title: Fine timing acquisition
- Patent Title (中): 精细定时采集
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Application No.: US11372394Application Date: 2006-03-08
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Publication No.: US20060221810A1Publication Date: 2006-10-05
- Inventor: Bojan Vrcelj , Fuyun Ling , Raghuraman Krishnamoorthi , Vinay Murthy
- Applicant: Bojan Vrcelj , Fuyun Ling , Raghuraman Krishnamoorthi , Vinay Murthy
- Main IPC: H04J11/00
- IPC: H04J11/00 ; H04J3/06

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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