Acquisition of timing information in wireless communication...

Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via code word channels

Reexamination Certificate

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Reexamination Certificate

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07995616

ABSTRACT:
A method for identifying a reference point in time in a wireless communication system includes: receiving a first repeated sequence of symbols; receiving a second repeated sequence of symbols; performing an autocorrelation between the first and second sequences of symbols; and identifying as the reference point in time an autocorrelation null between the first and second repeated sequences of symbols. Apparatus for identifying a reference point in time in a wireless communication system includes: means for receiving a first repeated sequence of symbols; means for receiving a second repeated sequence of symbols; means for performing an autocorrelation between the first and second sequences of symbols; and means for identifying as the reference point in time an autocorrelation null between the first and second repeated sequences of symbols.

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Liang, et al., “Synchronization of OFDM-based WLAN with Transmit and Receive Diversities,” Personal, Indoor and Mobile Radio Communications, 2005. PIRMC 2005. IEEE 16th International Symposium on Berlin, Germany Sep. 11-14, 2005, Piscataway, NJ, USA, IEEE.
International Search Report—PCT/US08/052816, International Searching Authority—European Patent Office, Dec. 3, 2008.
Written Opinion—PCT/US08/052816, International Searching Authority—European Patent Office, Dec. 3, 2008.

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