FREQUENCY SYNCHRONIZATION APPARATUS IN OFDM SYSTEM

PURPOSE: A frequency synchronization device of an OFDM system is provided to improve performance degradation in inferior channel environment by applying a weighting value according to the correlation period of an OFDM multiple path. CONSTITUTION: A channel estimator(100) obtains a main path from a c...

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Main Authors IM, SE BIN, LEE, JUNG HOO, KIM, JUNG IN, CHOI, HYUNG JIN, LEE, HYUN SUK, KANG, JIN YONG
Format Patent
LanguageEnglish
Korean
Published 26.08.2010
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
MULTIPLEX COMMUNICATION
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:PURPOSE: A frequency synchronization device of an OFDM system is provided to improve performance degradation in inferior channel environment by applying a weighting value according to the correlation period of an OFDM multiple path. CONSTITUTION: A channel estimator(100) obtains a main path from a channel impulse response value, each delay time of the main path, and power of the main path and an echo path. A correlator(200) obtains a first correlation value between a first guard period and a first copying period, a second correlation value between a first overlapping period and a second overlapping period, and a third correlation value between a second guard period and a second copying period. A weighting value calculating part(300) obtains a first, a second, and a third weighting value by using noise power.
Bibliography:Application Number: KR20090013542