New Method of OFDM Carrier Frequency Offset Estimation Using Single Channel Recordings
Cheng Gui-bi · Journal of Xiamen University · 2014
This paper proposes a novel approach to estimate carrier frequency offset(CFO)of an OFDM system using independent component analysis(ICA).Classical ICA algorithms require multiple mixed signals to perform signal separation.However,only by processing single channel OFDM data with the correlation detection technology,the new method is capable of separating the independent components,which include CFO information using ICA and then estimate the CFO of OFDM signals.Compared with the traditional frequency offset estimation methods,this method requires no channel state information(CSI),auxiliary information,and additional bandwidth,thus greatly reducing the complexity of system implementation.The simulation results show that the method is accurate and its range of frequency offset estimation can reach 0.5times of the sub-carrier spacing.