Invention Grant
- Patent Title: Synchronization for OFDM signals
- Patent Title (中): OFDM信号同步
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Application No.: US11362214Application Date: 2006-02-24
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Publication No.: US07675844B2Publication Date: 2010-03-09
- Inventor: James W. McCoy
- Applicant: James W. McCoy
- Applicant Address: US TX Austin
- Assignee: Freescale Semiconductor, Inc.
- Current Assignee: Freescale Semiconductor, Inc.
- Current Assignee Address: US TX Austin
- Agent Charles W. Bethards
- Main IPC: H04J11/00
- IPC: H04J11/00 ; H04J3/06

Abstract:
A method of acquiring, at a receiver, fine timing synchronization for an Orthogonal Frequency Division Multiplexing (OFDM) signal as transported over a channel, includes determining an impulse response of the channel; dynamically creating a window function corresponding to the impulse response; and selecting a multiplicity of samples of the OFDM signal in accordance with the window function, where the multiplicity of samples are time aligned with an OFDM demodulator. A corresponding synchronizer includes a correlator for cross correlating a received preamble with a known preamble to provide an impulse response corresponding to the channel; a window generator configured to dynamically create a window function corresponding to the impulse response; and a selector configured to select a multiplicity of samples of the OFDM signal in accordance with the window function, where the multiplicity of samples are time aligned with a Fast Fourier Transform window associated with an OFDM demodulator.
Public/Granted literature
- US20070201349A1 Synchronization for OFDM signals Public/Granted day:2007-08-30
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