2026/08/01 by Prakash Chaki, Takumi Ishihara, Shinya Sugiura
Engineering · #eess.SP
paper · pdf · doi:10.1109/vtc2022-spring54318.2022.9860537
5 pages, 4 figures, Preprint (accepted version) for publication in IEEE 95th Vehicular Technology Conference (IEEE VTC2022-Spring), 2022
arxiv created 2026/08/01 · arxiv updated 2026/08/04
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 a filterbank multicarrier system under reduced subcarrier spacing, where precoded index modulated symbols are mapped onto the subcarriers. The detrimental effects of inter-carrier interference (ICI) resulting from the non-orthogonality between subcarriers are efficiently mitigated with the aid of eigenvalue-decomposition-based precoding. Our simulation results demonstrate that the proposed precoded NOFDM-SIM system exhibits a similar peak-to-average power ratio to OFDM and OFDM-SIM counterparts while achieving the bit error ratio limit of zero-ICI OFDM.