Timing estimation based on normalized 3rd-order central moment for symmetric correlator in OFDM systems

We proposed a new method for accurate timing estimation in OFDM systems. A conventional timing estimation based on autocorrelation and crosscorrelation experience performance degradation due to multipath channel distortion. The proposed method is developed based on normalized 3rd-order central moment for symmetric correlator. Based on these 3rd-order central moment, a binary hypothesis testing problem is formulated. Computer simulations show that the method is robust in fading multipath channels, achieving better performance than the existing methods in lower SNR.