Abstract: A method for Blind Detection of OFDM Signal Based on Cepstrum Processing is presented, which makes use of hidden periodicity of OFDM spectrum and has strong ability to bate the add interference and multiply interference so as to identify OFDM signals at lower signal/noise ratio. It not only can accurately estimate the sub-carrier frequency interval, symbol periods, bandwidth and sub-carrier numbers of OFDM signals but also has lower computational complexity and more accurate estimation, which are proper for hardware implement. The simulations further demonstrate the effectivity of our scheme.

Key words: Blind Detection, Orthogonal Frequency Division Multiplexing (OFDM), Cepstrum Processing, Sub-carrier Frequency Interval Estimation.