Spectral efficiency improvement is a key focus in most wireless communication systems and achieved by various means such as using large antenna arrays and/or advanced modulation schemes signal formats. This work proposes to further improve spectral through combining non-orthogonal spectrally efficient frequency division multiplexing (SEFDM) with index (IM), which can efficiently make use of the...

In this paper, we propose a novel precoded non-orthogonal frequency division multiplexing (NOFDM) with subcarrier index modulation (SIM) to increase spectral efficiency for multicarrier systems. The proposed NOFDM-SIM scheme is constituted by filterbank system under reduced spacing, where modulated symbols are mapped onto the subcarriers. detrimental effects of inter-carrier interference (ICI) ...