Detection Methods of OFDM Signal in Fading Channels Based on Higher Order Moments
Haiming Li · Journal of Air Force Engineering University · 2008
Orthogonal Frequency Division Multiplexing(OFDM) technique is an efficient data transmission technique with good immunity for the effects of multi-path channel interference,inter-symbol interference,narrowband interference and high frequency spectrum utilization ratio.It has been widely used in practice.Automatic identification and modulated parameter estimation of communication signal of OFDM are key technologies in non-cooperative communication and software radio.Aiming at the detection methods of OFDM signal based on higher order cumulants,the paper proposes a novel method used to detect OFDM signal in the fading channel based on four higher order moments.This method can detect OFDM from signal-carrier modulated signals(MPSK or MQAM).Theory analysis and simulation date can prove that the algorithm has beautiful detection and identification defection and fading signal adaptability.