APPARATUS AND METHOD FOR SYNCHRONIZING COARSE FREQUENCY FOR OFDM SYSTEM

摘要

PURPOSE: It generals of the OFDM system, by accumulating the differential correlation value and eliminating the differential correlation value which is accumulated in case of the ICI determination criterion value or greater the apparatus for frequency synchronization and method can rise the noise removal effect and frequency offset estimation performance in the co-channel interference environment of the OFDM system. CONSTITUTION: The delay unit(100) delays the symbol signal of the OFDM frequency domain. The differential correlator(200) concerns the symbol signal delayed with the symbol signal differential. It presently accumulates differential correlation values of the previous and differential correlation value from the differential correlator and the accumulation operator(300) is presently created the accumulation correlation value. The co-channel interference delete presently decides the co-channel interference whether or not about the accumulation correlation value from the accumulation operator.