AI 中文总结
针对多载波系统频谱效率提升问题，提出预编码NOFDM-SIM方案，基于滤波器组多载波系统结合特征值分解预编码缓解ICI，仿真显示其峰均比与OFDM类系统相近且误码率达零ICI OFDM极限。
AI 中文摘要
本文提出一种新型的采用子载波索引调制（SIM）的预编码非正交频分复用（NOFDM），以提升多载波系统的频谱效率。所提NOFDM-SIM方案由子载波间隔缩小的滤波器组多载波系统构成，预编码的索引调制符号被映射到子载波上。借助基于特征值分解的预编码，可有效缓解子载波间非正交性导致的载波间干扰（ICI）的有害影响。仿真结果表明，所提预编码NOFDM-SIM系统的峰均比与OFDM、OFDM-SIM系统相近，同时达到了零ICI OFDM的误码率极限。
英文摘要
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.
Comments5 pages, 4 figures, Preprint (accepted version) for publication in IEEE 95th Vehicular Technology Conference (IEEE VTC2022-Spring), 2022
DOI：10.1109/VTC2022-Spring54318.2022.9860537
