GFDM Interference Mitigation Without Noise Enhancement

Generalized frequency division multiplexing (GFDM) is a promising candidate for the next generation of wireless communications. Using non-orthogonal pulse shapes in GFDM, the transmitted symbols overlap on each other according to a self-interference matrix. Because of those small singular values of this matrix, the interference compensation leads to noise enhancements at the receiver of GFDM. In this letter, we develop a novel scheme called coded GFDM (CGFDM) that transmits a coded version of symbols. It is shown that the self-interference matrix of CGFDM is unitary with the singular values all equal to one; as a result, the interference removal does not enhance the power of noise.