Abstract: In order to solve the problem of estimating the symbol rate of filter bank multicarrier (FBMC), this paper proposes a secondorder moment of autocorrelation and cyclic autocorrelation algorithm. The symbol period of the signal is estimated by the autocorrelation secondorder moment characteristic of the FBMCoffset quadrature amplitude modulation (OQAM) signal.Then, according to the cyclic autocorrelation of the FBMCOQAM signal, the cycle frequency α=0 map has discrete spectral line features for the symbol period estimation. Finally, the performance of the symbol period estimation algorithm is compared. The simulation results show that under a low signaltonoise ratio, both algorithms can effectively realize the symbol period estimation of the FBMCOQAM signal.

Key words: filter bank multicarrier signal, secondorder moment of autocorrelation, cyclic autocorrelation, blind estimation