Pulse or digital communications – Synchronizers – Frequency or phase control using synchronizing signal
Reexamination Certificate
2007-12-11
2007-12-11
Fan, Chieh M. (Department: 2611)
Pulse or digital communications
Synchronizers
Frequency or phase control using synchronizing signal
C375S354000
Reexamination Certificate
active
11442447
ABSTRACT:
Provided is a frame synchronization method for synchronizing frames with pilot blocks added thereto based on differential correlation information in a satellite communication system. The method can acquire a highly reliable frame synchronization estimation value by achieving a multi-step threshold value test using pilot blocks after a correlation analysis and a threshold test based on a sync signal in order to resolve the problem of a low signal-to-noise ratio and a large frequency error and acquire highly reliable frame synchronization performance, and can overcome distortion of a correlation analysis value caused by the frequency error by analyzing correlation based on differential information. The method includes the steps of: a) performing correlation analysis and a threshold test by using a sync word; and b) performing a multi-step correlation value test by using the pilot blocks added to the frames prior to the sync word.
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Pansoo Kim et al., “Advanced Demodulator Implementation for DVB-S2 System” 2005 Joint Conference on Satellite Communications (JC-SAT 2005), Oct. 13-14, 2005, pp. 101-108, The Institute of Electronics, Information and Communication Engineers, IEICE Technical Report SAT2005-33(Oct. 2005).
Chang Dae-Ig
Kang Deokchang
Kang Seokheon
Kim Pan-Soo
Kim Tae-Hoon
Blakely & Sokoloff, Taylor & Zafman
Electronics and Telecommunications Research Institute
Fan Chieh M.
Joseph Jaison
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