We developed an evolutional long-distance-delay-wave-distortion equalizing method under the SFN (Single Frequency Network) of terrestrial digital television network and confirmed that its performance is excellent. In this method, delay distortion is equalized by employing distortion compensation function (transfer function) which is produced by delay wave levels and delay times which are obtained by using conventional power spectrum method, polarity (lag or lead) of delay waves and carrier phase differences between the main wave and each delay wave which are obtained by newly developed method.
