Sughrue Mion, PLLC
Method and apparatus for fine frequency synchronization in wireless broadband (WiBro) system without using global positioning system (GPS) receiver
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.
Samsung Electronics Co., Ltd. ICU Research and Industrial Cooperation Group
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Hyun-cheol Joong-soo Sung-won Jung-ho Hae-lyong Yong-sung Young-gon Nam-shik
Park Ma Lee Kim Kim Roh Choi Kim