GFDM performance research based on multiparameter variable filter.

As one of multi-carrier modulation schemes suitable for 5G/B5G scenarios, the generalized frequency division multiplexing (GFDM) waveform has flexible time-frequency resource distribution. To further reduce out-of-band power leakage of GFDM system, a multiparameter variable GFDM prototype filter is proposed. The flexible configuration of multiparameter method achieves better out-of-band power suppression performances and a precise control of out-of-band power efficiency suppression. Simultaneously, theoretical bit error rate (BER) expression of GFDM system with multiparameter variable filter under frequency selective fading channel is derived. In addition, in order to further improve the BER performance of GFDM system in complex channel scenarios, a message passing (MP) receiver suitable for multiparameter GFDM waveforms is proposed, and the mathematical model of the MP receiving algorithm is given according to the equivalent channel matrix. Simulation results show that the MP receiver can effectively improve the BER performance of GFDM waveform in complex channels. Moreover, the variable filter based on multiparameter can effectively suppress out-of-band power with slight BER loss in comparison with traditional raised cosine (RC) filter. [ABSTRACT FROM AUTHOR]