分数阶傅里叶域PAPR降低
Fractional Fourier Domain PAPR Reduction
AI总结：
针对多载波系统的高峰均功率比问题，提出动态角度分数阶傅里叶分复用（DA-FrFDM）系统，通过分数阶傅里叶域平衡时频特性并引入二次相位序列实现单抽头均衡，在保持信号质量与抗干扰能力的同时显著降低了PAPR。
摘要：
高峰均功率比（PAPR）长期对多载波系统构成挑战，影响放大器效率和整体系统性能。本文引入动态角度分数阶傅里叶分复用（DA-FrFDM），这是一种创新的多载波系统，能以极低的信令开销有效降低QAM和高斯信号的PAPR。DA-FrFDM利用分数阶傅里叶域平衡时域和频域间的PAPR特性，在保持信号质量的同时实现显著的PAPR降低。此外，DA-FrFDM通过将时域信号简单乘以二次相位序列，优化了信号处理，并实现了分数阶傅里叶域的单抽头均衡。结果表明，DA-FrFDM不仅优于现有PAPR降低技术，还在双色散信道中保留了高效的载波间干扰（ICI）抑制能力。
英文摘要：
High peak-to-average power ratio (PAPR) has long posed a challenge for multi-carrier systems, impacting amplifier efficiency and overall system performance. This paper introduces dynamic angle fractional Fourier division multiplexing (DA-FrFDM), an innovative multi-carrier system that effectively reduces PAPR for both QAM and Gaussian signals with minimal signaling overhead. DA-FrFDM leverages the fractional Fourier domain to balance PAPR characteristics between the time and frequency domains, achieving significant PAPR reduction while preserving signal quality. Furthermore, DA-FrFDM refines signal processing and enables one-tap equalization in the fractional Fourier domain through the simple multiplication of time-domain signals by a quadratic phase sequence. Our results show that DA-FrFDM not only outperforms existing PAPR reduction techniques but also retains efficient inter-carrier interference (ICI) mitigation capabilities in doubly dispersive channels.
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