Blind CFO Estimator for Spectrally Efficient Frequency Division Multiplexing System

In this Letter, an efficient blind carrier frequency offset (CFO) estimator is proposed for fractional CFO estimation in spectrally efficient frequency division multiplexing (SEFDM) system. Without exhaustive searching procedure, the estimate of CFO for SEFDM can be obtained by interpolation to maximize the designed objective function. Moreover, the behaviour of designed objective function is analyzed under the effect of packing factor of SEFDM and constellation type. Simulation results demonstrate that our proposed blind CFO estimator for SEFDM outperforms traditional estimators in the non-dispersive channel and time dispersive channel.