Blind carrier frequency offset estimation for non-critically sampled FMT systems in multipath channels

In this paper we consider the problem of blind carrier-frequency offset (CFO) estimation for non-critically sampled filtered multitone (FMT) systems in multipath channels. Specifically, by exploiting the statistical properties of the received FMT signal in the presence of multipath channels a closed-form blind CFO estimator is derived. The proposed algorithm does not require the knowledge of the channel impulse response and demonstrates a remarkable robustness in the presence of a non-ideal timing recovery. Computer simulation results are carried out to analyze the performance of the proposed CFO estimation algorithm.