Adaptive Pulse Shaping Filter and Multiple Access Technology for OFDM/OQAM System

The traditional CP-OFDM based multiple access technology still has two drawbacks, i.e., adding cyclic prefix reduces the spectrum efficiency and it is sensitive to the Doppler frequency shift. In this paper, the time-frequency localization of the Extended Gauss Function (EGF) based OFDM/OQAM system is investigated. Consequently, an adaptation scheme in the downlink OFDMA/OQAM system is proposed where the transmitter can choose reasonable spreading factor to match the channel propagation against the inter-symbol interference and inter-carrier interference. Finally, the adaptive scheme is extended to the OFDM/OQAM-based multiple access technology to optimize the system performance. Simulation results prove the effectiveness of the proposed method.