Pulse or digital communications – Receivers – Automatic frequency control
Reexamination Certificate
2008-02-05
2011-10-04
Kim, Kevin (Department: 2611)
Pulse or digital communications
Receivers
Automatic frequency control
Reexamination Certificate
active
08031818
ABSTRACT:
Provided is a fine frequency synchronization method of a WiBro system, and particularly, a fine frequency synchronization method which measures a spread degree of a received signal of an adjacent subcarrier using orthogonality of PN sequences and thereby estimates a frequency offset, in a base station or a wireless repeater without using a GPS receiver. The fine frequency synchronization method includes: (a) performing despreading on received adjacent subcarrier sequences, using a PN sequence transmitted from a transmitting party; (b) obtaining ratios of correlative values obtained by the despreading; and (c) estimating a frequency offset on the basis of the ratio of correlative values. Accordingly, fine frequency offset estimation with relatively low complexity is possible without using a GPS receiver in a WiBro environment where interference signals of other base stations or repeaters exist.
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Choi Young-gon
Kim Hae-lyong
Kim Jung-ho
Kim Nam-shik
Lee Sung-won
ICU Research and Industrial Cooperation Group
Kim Kevin
Samsung Electronics Co,. Ltd.
Sughrue & Mion, PLLC
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