Optical OFDM based on the fractional Fourier transform
Optical OFDM based on the fractional Fourier transform
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基于分数阶傅立叶变换的光正交频分复用
DOI：
10.1117/12.910417
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
G. Cincotti
中科院分区：
文献类型：
--
作者：
G. Cincotti
我们描述了一种创新的OFDM方案的基础上正交啁啾子载波，对应于分数傅里叶变换（FrFT）的输入信号。FrFT可以以与传统的快速傅里叶变换（FFT）相当的复杂度电子地实现;另一方面，在光域中实现FrFT的平面器件类似于执行FFT的无源阵列波导光栅（AWG）器件。我们分析了基于FRFT的光OFDM系统的频谱效率、峰均功率比（PAPR）和频偏敏感性，并与基于标准FFT的实现进行了精确的比较。
We describe a innovative OFDM scheme based on orthogonal chirped subcarriers, that corresponds to the fractional Fourier transform (FrFT) of the input signal. The FrFT can be electronically implemented with a complexity equivalent to the conventional fast Fourier transform (FFT); on the other hand, the planar device that implements the FrFT in the optical domain is similar to the passive arrayed waveguide grating (AWG) device that performs the FFT. We analyze the spectral efficiency, the peak-to-average power ratio (PAPR) and the frequency offset sensitivity of a FrFT-based optical OFDM system, and make an accurate comparison with the standard FFT-based implementation.