Blind minimum interference symbol synchronization for ofdm systems in long isi channels

This letter introduces a blind minimum interference symbol synchronization for orthogonal frequency-division multiplexing (OFDM) systems based on the cyclic prefix (CP). The basic idea of our contribution is to obtain an estimate of the channel-tap powers from the correlation characteristics of the CP. Based on the estimate of the channel-tap powers, a minimum interference metric is proposed. The proposed algorithm as low complexity and can be used to cope with long inter-symbolinterference (ISI) channels with length up to twice the CP length.