On timing offset estimation for OFDM systems

Two timing offset estimation methods for orthogonal frequency division mult iplexing (OFDM) systems as modifications to Schmidl and Cox's method [6] ar e presented. The performances of the timing offset estimators in additive w hite Gaussian noise channel and intersymbol interference channel are compar ed in terms of estimator variance obtained by simulation. Both proposed met hods have significantly smaller estimator variance in both channel conditio ns.