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

摘要

PURPOSE: An orthogonal frequency division multiplexing(OFDM) receiver which estimates timing errors in a multi-path fading channel, an orthogonal frequency division multiplexing system including the same, and a timing error estimation method thereof are provided to prevent inter-symbol interference(ISI), thereby correctly recovering a received signal. 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) samples 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. 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.