Preamble aided synchronization
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United States of America Patent
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May 27, 2008
Grant Date -
May 4, 2006
app pub date -
Dec 15, 2005
filing date -
Nov 20, 2001
priority date (Note) -
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Abstract
The repetitive structure of a preamble signal is exploited to enhance timing synchronization performance and frame start detection performance under adverse channel conditions. Received values are cross-correlated in time against a known noise-free version of the preamble. The presence of peaks in the cross-correlation output indicates presence of a frame. The peak locations provide symbol timing. Further cross-correlation processing and/or non-linear processing can be used to enhance the signal to noise ratio of the peaks.
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