OFDM RECEIVER BEING CAPABLE OF ESTIMATING TIMING IN MULTI-PATH FADING CHANNEL, OFDM SYSTEM HAVING THE SAME AND TIMING ESTIMATION METHOD THEREOF

摘要

PURPOSE: An orthogonal frequency division multiplexing(OFDM) receiver which estimates timing in a multi-path fading channel, an OFDM system including the same, and a timing estimation method thereof are provided to improve timing estimation performance by eliminating timing errors. CONSTITUTION: A first timing estimation part(110) calculates a timing metric value based on an autocorrelation function of a received signal including a baseband orthogonal frequency division multiplexing(OFDM) sample signal. The first timing estimation part calculates a first timing estimation value based on the calculated timing metric value. A second timing estimation part(120) calculates a filtered timing metric value based on a cross-correlation function between the received signal and a preamble signal in a first timing estimation range based on the first timing estimation value. The second timing estimation part calculates a second timing estimation value based on the filtered timing metric value. An optimum-timing estimation part(130) calculates an optimum-timing estimation value by comparing an amplification amount.