激光与光电子学进展, 2013, 50 (10): 100605, 网络出版: 2013-08-21
分数阶傅里叶变换对CO-OFDM系统高峰均功率比的抑制性能研究
Research on the Ability of Fractional Fourier Transform to Reduce PAPR in CO-OFDM System
光通信 光正交频分复用 分数阶傅里叶变换 峰均功率比 optical communications optical orthogonal frequency division multiplexing fractional Fourier transform peak to average power ratio
摘要
高峰均功率比(PAPR)是影响光正交频分复用(OOFDM)系统性能的主要因素。提出了用分数阶傅里叶变换(FRFT)取代传统快速傅里叶变换(FFT)的新型相干光正交频分复用(CO-OFDM)系统。重点分析了FRFT降低系统PAPR的原理,并通过光路系统中的仿真实验证明,该算法对PAPR具有明显的抑制效果,但这种抑制效果并不能无限提升,当阶数低于0.001时,其抑制效果不再发生显著变化。
Abstract
The high peak-average power ratio (PAPR) is a major factor affecting the performance of the optical orthogonal frequency division multiplexing (OOFDM) system. We put forward a novel coherent optical orthogonal frequency division multiplexing (CO-OFDM) system in which we use the fractional Fourier transform (FRFT) to replace the traditional fast Fourier transform (FFT). Focus is put on the analysis of the principle that FRFT can reduce PAPR. The optical system simulation experiments show that the algorithm has obvious inhibitory effect on PAPR, but this inhibition cannot be improved infinitely: when the order is less than 0.001, the effect is no longer changed significantly.
刘畅, 童峥嵘, 曹晔, 张卫华. 分数阶傅里叶变换对CO-OFDM系统高峰均功率比的抑制性能研究[J]. 激光与光电子学进展, 2013, 50(10): 100605. Liu Chang, Tong Zhengrong, Cao Ye, Zhang Weihua. Research on the Ability of Fractional Fourier Transform to Reduce PAPR in CO-OFDM System[J]. Laser & Optoelectronics Progress, 2013, 50(10): 100605.