State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
State Key Laboratory of Information Security, Institute of Information Engineering, Chinese Academy of Sciences, Beijing, 100093, China.
Sci Rep. 2017 Jul 20;7(1):6058. doi: 10.1038/s41598-017-06427-1.
A combination of phase and amplitude modulation in nonlinear discrete spectrum is proposed based on nonlinear frequency division multiplexing. Here the integrable nonlinear Schrodinger equation is used as the channel model. We propose the transmission system with designed transmitting signals and implement our scheme with simulation. We use 8QAM constellation and 2 eigenvalues to generate 5 bit signals, which greatly improve spectral efficiency. This method can be expanded for higher order modulation and further improve transmission capacity in limited bandwidth.
提出了一种基于非线性频分复用的非线性离散谱中相位和幅度调制的组合。这里采用可积非线性薛定谔方程作为信道模型。我们提出了具有设计传输信号的传输系统，并通过仿真实现了我们的方案。我们使用 8QAM 星座和 2 个本征值生成 5 位信号，从而大大提高了频谱效率。这种方法可以扩展到更高阶调制，进一步提高有限带宽内的传输容量。
