Adaptive synchronization enhancement technique for serial modulated waveforms
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United States of America Patent
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May 11, 2010
Grant Date -
Dec 31, 2009
app pub date -
Dec 21, 2005
filing date -
Jul 28, 2005
priority date (Note) -
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Abstract
Methods and apparatus for synchronization (SYNC) detection of a received serial offset quadrature pulse shaped waveform modulated by a symbol SYNC sequence are provided. The waveform is serially demodulated into a serial baseband signal and correlated in parallel with segments of the symbol SYNC sequence. Correlation strength estimates of each of the correlated output signals are computed and used to adjust a SYNC threshold level. The correlation strength estimates or the correlated output signals are combined and a peak is determined in the resulting signal. The peak in the resulting signal is compared to the SYNC threshold level to detect synchronization.
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