%L discovery10051798 %V 11 %C Budapest, Hungary %D 2018 %O This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. %T SEFDM: Spectral Efficiency Upper Bound and Interference Distribution %X This work explores the statistical model for a 5G and beyond (5GB) multi-carrier signal candidate; spectrally efficient frequency division multiplexing (SEFDM), in which the orthogonality between its subcarriers is intentionally violated compared to conventional orthogonal frequency division multiplexing (OFDM). A mathematical model describing the statistical characteristics of inter-carrier interference (ICI) is derived and verified through system model simulations. Results show that the ICI is of normal distribution, whose variance is dependent on both the level of bandwidth compression and on the signal level. Models developed are used to derive the error bounds of SEFDM signals in Gaussian noise channels, as well as the upper bound of SEFDM spectral efficiency %A H Ghannam %A I Darwazeh %B Proceedings of CSNDSP 2018 : 11th IEEE/IET International Symposium on Communication Systems, Networks & Digital Signal Processing %S CSNDSP: IEEE/IET International Symposium on Communication Systems, Networks & Digital Signal Processing %I IEEE