Improved timing estimation based on symmetric correlator using statistical change of correlator for OFDM systems

An improved method for estimating the symbol timing offset based on symmetric correlator using statistical change of correlator in preamble-aided OFDM systems is presented. It uses a preamble structure that have symmetrical property and combines with statistical change of Correlator to achieve a near-ideal timing performance without degradation in multipath channel environment. Computer simulations show that the method is robust in fading multipath channels, achieving better performance than the existing methods.