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Constant Envelop Minimum-Shift Keying OFDM Coherent Optical Communication System

机译:恒定包络最小频移键控OFDM相干光通信系统

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摘要

In this paper, we propose a constant envelop minimum-shift keying orthogonal frequency division multiplexing (CE-MSK-OFDM) modulation scheme. This scheme can mitigate the inherent drawbacks of CE quadrature phase shift keying OFDM (CE-QPSK-OFDM) and MSK-OFDM. Advantages of the proposed CE-MSK-OFDM modulation scheme are theoretically investigated. A CE-MSK-OFDM coherent optical experimental system is presented. In our experiment, 2.5 Gb/s CE-MSK-OFDM signal and 2.5 Gb/s CE-QPSK-OFDM signal are transmitted over a 100 km standard single mode fiber (SSMF) without phase compensation to check its advantages in mitigating intercarrier interference (ICI). In addition, performance under large fiber launch power is also measured to check its advantages in counteracting fiber nonlinear impairments. The experimental results show that the proposed system performs well in decreasing ICI and peak-to-average power ratio (PAPR) as the theoretical analysis reveals.
机译:在本文中,我们提出了一种恒定包络最小频移键控正交频分复用(CE-MSK-OFDM)调制方案。该方案可以减轻CE正交相移键控OFDM(CE-QPSK-OFDM)和MSK-OFDM的固有缺陷。理论上研究了所提出的CE-MSK-OFDM调制方案的优点。提出了一种CE-MSK-OFDM相干光学实验系统。在我们的实验中,2.5 Gb / s CE-MSK-OFDM信号和2.5 Gb / s CE-QPSK-OFDM信号通过100 km标准单模光纤(SSMF)传输,没有相位补偿,以检查其在减轻载波间干扰方面的优势( ICI)。此外,还测量了大光纤发射功率下的性能,以检查其在抵消光纤非线性损伤方面的优势。实验结果表明,所提出的系统在降低ICI和峰均功率比(PAPR)方面表现良好,如理论分析所示。

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