METHOD FOR ESTIMATING AN INTEGER FREQUENCY OFFSET BY USING THE CORRELATION OF ADJACENT PILOTS IN AN OFDM(ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING) SYSTEM CALCULATING AN INTEGER FREQUENCY OFFSET

摘要

PURPOSE: A method for estimating an integer frequency offset by using the correlation of adjacent pilots in an OFDM(Orthogonal Frequency Division Multiplexing) system is provided to estimate an integer frequency offset by using the correlation of adjacent pilots in a frequency domain.;CONSTITUTION: Fast Fourier transform(201) changes a received signal into a frequency domain signal. A symbol acquisition unit(202) obtains one or more consecutive OFDM(Orthogonal Frequency Division Multiplexing) symbols through a signal passing the fast Fourier transform. A plurality of received signal moving units(203) obtains a second frequency band by transferring a first frequency band of the OFDM symbol which is obtained according to a plurality of integer frequency offset candidate values. A template generating unit generates a template to maximize the correlation value between samples. A plurality of correlation units(205) calculates the correlation value between a sample and the template in the most adjacent pilot index. An integer frequency offset estimating unit(206) finally determines an integer frequency offset.;COPYRIGHT KIPO 2012