论文标题
非正交多载波信号波形的索引调制模式设计
Index Modulation Pattern Design for Non-Orthogonal Multicarrier Signal Waveforms
论文作者
论文摘要
光谱效率提高是大多数无线通信系统中的关键重点，并且通过各种方式实现，例如使用大型天线阵列和/或高级调制方案和信号格式。这项工作建议通过将非正交的频谱频施加频率分组多路复用（SEFDM）系统与索引调制（IM）相结合，以进一步提高光谱效率，该系统可以有效地利用激活的子载流子作为通信信息的索引。最近的研究证明，IM可以与SEFDM一起使用，以减轻载流器干扰（ICI）并改善错误性能。这项工作提出了基于新型激活模式设计的新SEFDM信号格式，该格式限制了激活的子载体的位置，并在每个SEFDM子块中启用了可变数量的激活子载体。 SEFDM-IM系统设计是通过共同考虑激活模式，调制方案和信号波形格式开发的，并在不同的光谱效率方案下评估了一组解决方案。编码系统和仿真研究的详细建模表明，所提出的设计不仅会导致更好的位错误率（BER），还导致较低的峰值功率比（PAPR）（PAPR）和相对于其他报道的索引调制系统的计算复杂性降低。
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 and signal formats. This work proposes to further improve spectral efficiency through combining non-orthogonal spectrally efficient frequency division multiplexing (SEFDM) systems with index modulation (IM), which can efficiently make use of the indices of activated subcarriers as communication information. Recent research has verified that IM may be used with SEFDM to alleviate inter-carrier interference (ICI) and improve error performance. This work proposes new SEFDM signal formats based on novel activation pattern designs, which limit the locations of activated subcarriers and enable a variable number of activated subcarriers in each SEFDM subblock. SEFDM-IM system designs are developed by jointly considering activation patterns, modulation schemes and signal waveform formats, with a set of solutions evaluated under different spectral efficiency scenarios. Detailed modelling of coded systems and simulation studies reveal that the proposed designs not only lead to better bit error rate (BER) but also lower peak-to-average power ratio (PAPR) and reduced computational complexity relative to other reported index-modulated systems.
