APPARATUS AND METHOD FOR FREQUENCY OFFSET ESTIMATION IN OFDM SYSTEM, AND METHOD FOR TIME OFFSET ESTIMATION

摘要

PURPOSE: An apparatus and a method for frequency offset estimation in an OFDM system, and a method for time offset estimation are provided to estimate the high accuracy of a frequency offset if there is a time error. CONSTITUTION: In an apparatus and a method for frequency offset estimation in an OFDM system. An FFT (Fast Fourier Transform) demodulator demodulates a modulated signal through IFFT(Inverse Fast Fourier Transform). A correlation value calculation module(201) calculates a correlation value between the output from FFT and a training symbol. A threshold calculation module(204) calculates a threshold for the frequency offset estimation. A comparison calculation module(202) compares the correlation value with the threshold value.