This letter first investigates the effects of inter-frame interference (IFI) on the recent eigendecomposition-precoded (EVD) non-orthogonal frequency-division multiplexing (NOFDM) transmission scheme, where subcarrier spacing is set smaller than that of orthogonal frequency-division multiplexing (OFDM). More specifically, the system model of EVD-NOFDM is generalized to support multi-frame transmission, and we propose an optimal power allocation for the multi-frame EVD-NOFDM architecture. The NOFDM scheme’s information rate bound is derived and evaluated by our theoretical analysis by assuming the presence of IFI, whereas most previous NOFDM studies ignored IFI effects. Our performance results demonstrate that the proposed multi-frame NOFDM scheme eliminates the detrimental IFI effects while attaining its specific benefits of bandwidth efficiency.

中文翻译：

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帧间干扰对特征分解预编码非正交频分复用的影响

这封信首先研究了帧间干扰 (IFI) 对最近的特征分解预编码 (EVD) 非正交频分复用 (NOFDM) 传输方案的影响，其中子载波间隔设置为小于正交频分复用的间隔。 (OFDM)。更具体地说，EVD-NOFDM 的系统模型被推广以支持多帧传输，我们提出了多帧 EVD-NOFDM 架构的最佳功率分配。NOFDM 方案的信息速率界限是通过我们的理论分析推导出和评估的，假设存在 IFI，而大多数以前的 NOFDM 研究忽略了 IFI 效应。我们的性能结果表明，所提出的多帧 NOFDM 方案消除了不利的 IFI 效应，同时获得了带宽效率的特定优势。