A Interference-Free Transmission Scheme for GFDM System

This paper proposes a new generalized frequency division multiplexing (GFDM) transmission scheme. The orthogonality conditions are first proposed in order to eliminate the intrinsic interference of the conventional GFDM system. Based on the orthogonality conditions, two prototype filters are then designed for the new GFDM scheme, and are used for the evennumbered subcarriers and odd-numbered subcarriers, respectively. So, the even-numbered subcarriers and odd-numbered subcarriers can reach orthogonality, and then can get rid of the intrinsic interference. Simulation results indicate that the proposed GFDM scheme has the same bit error rate (BER) performance to the orthogonal frequency division multiplexing system, and the BER performs better than that of the conventional GFDM system. Moreover, the conventional multiple-input multiple-output transmission schemes and channel estimation schemes can be directly applied on the proposed GFDM system.