Abstract: Filter bank multicarrier transmission with offset QAM (FBMC/OQAM) with high spectral efficiency and low out-of-band attenuation only satisfies real domain orthogonal conditions, and the intrinsic interference may seriously deteriorate the performance of channel estimation (CE) in practice. The interference cancellation method can eliminate the inherent interference around the pilot by designing a reasonable pilot structure. This type of method is simple, but the performance of channel estimation is susceptible to noise. There is a strong correlation between the subcarriers of the block pilot structure, resulting in redundant information in the channel estimation result. In order to utilize the redundant information, a new algorithm of estimation weighting is proposed to improve the performance of channel estimation. The simulation results show that the error rate performance of the new algorithm is better than the traditional algorithm.