Pulse or digital communications – Synchronizers – Network synchronizing more than two stations
Reexamination Certificate
2011-07-26
2011-07-26
Odom, Curtis B (Department: 2611)
Pulse or digital communications
Synchronizers
Network synchronizing more than two stations
C375S142000, C375S150000, C375S343000, C375S354000, C375S365000
Reexamination Certificate
active
07986757
ABSTRACT:
The present invention relates to an apparatus and method of acquiring initial synchronization of a terminal in a mobile communication system. According to an exemplary embodiment of the present invention, one or more auto-correlation values of a preamble constituting a signal that is received from a base station are calculated. Averages of the calculated auto-correlation values according to samples are calculated, and then a peak value is detected among the calculated values. Then, a cell search is performed on the basis of the detected peak value, and a peak value from the result of the cell search is regularized. Then, the regularized peak value is compared with a predetermined reference value such that it is checked whether synchronization of a signal that has been searched is accurate or not. According to an exemplary embodiment of the present invention, a value obtained by regularizing a result of a cell search is compared with a reference value, and it is checked again whether an accurate start point of a frame is detected or not on the basis of a result of the comparison. Accordingly, false alarm rates can be reduced.
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Kim Jun-Woo
Park Hyeong-Sook
Park Youn-Ok
Sohn Kyung-Yeol
Electronics and Telecommunications Research Institute
Jefferson IP Law, LLP
Odom Curtis B
Samsung Electronics Co., LLP
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