Peak-to-average power ratio reduction of transmission signal of all-optical orthogonal time/frequency domain multiplexing using fractional Fourier transform

被引:8
|
作者
Nagashima, T. [1 ]
Cincotti, G. [2 ]
Murakawa, T. [1 ]
Shimizu, S. [3 ]
Hasegawa, M. [1 ]
Hattori, K. [4 ]
Okuno, M. [4 ]
Mino, S. [4 ]
Himeno, A. [4 ]
Wada, N. [3 ]
Uenohara, H. [5 ]
Konishi, T. [1 ]
机构
[1] Osaka Univ, Grad Sch Engn, Osaka, Japan
[2] Univ Roma Tre, Via V Volterra 62, I-00143 Rome, Italy
[3] NICT, 4-2-1 Nukui Kitamachi, Koganei, Tokyo 1848795, Japan
[4] NTT Elect Co La, 6700-2 To, Naka, Ibaraki 3110122, Japan
[5] Tokyo Inst Technol, Midori Ku, 4259 Nagatsuta, Yokohama, Kanagawa 2268503, Japan
关键词
Peak-to-average power ratio reduction; Fiber nonlinearity mitigation; Fractional OFDM; Fractional Fourier transform; Nyquist OTDM; OFDM; EFFICIENT; SYSTEMS; FIBERS;
D O I
10.1016/j.optcom.2017.05.055
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We examine a peak-to-average power ratio (PAPR) reduction effect in an optical fiber link using a fractional Fourier transform (FrFT). Fractional OFDM (FrOFDM) based on FrFT in place of discrete Fourier transform is a multiplexing approach that can balance the pros and cons of subcarriers in the time and frequency domains while keeping its orthogonal condition. A careful investigation of the PAPR behavior of a FrOFDM signal confirms that its PAPA can be minimized at a point where a Nyquist pulse train is formed by a time-lens effect. With emphasis on this low-PAPR characteristic of a Nyquist pulse train, the signal quality degradation owing to fiber nonlinearity can be mitigated. A 1.0-dB signal quality improvement after propagation in a dispersion-compensated fiber link is demonstrated in a simulation for a 12 x 10-Gbaud/s 16 QAM FrOFDM signal in comparison with that of a conventional OFDM. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码:123 / 127
页数:5
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