For nonlinearity and dispersion mitigation in optical fiber, the authors propose a dual frame OFDM transmission, based on optical phase conjugation. The proposed dual frame OFDM is modification of asymmetrically clipped OFDM (ACO-OFDM) frame. The proposed OFDM frame consist of two positive frames, first one is time compressed ACO-OFDM frame and second one is optical phase conjugated version of first frame. This increases the bandwidth efficiency and total transmitted power for the system. For electronic dispersion compensation (EDC) in conventional OFDM, signal pre-processing is applied at transmitter side where it requires channel information. In case of OFDM and multiple input multiple output (MIMO) system setup for multi mode fiber, channel becomes almost unpredictable. The proposed dual frame OFDM does not require EDC at transmitter side. For received optical power $$-12$$ - 12 dbm conventional ACO-OFDM records bit error rate (BER) $$4.48*10^{-1}$$ 4.48 ∗ 10 - 1 and proposed dual frame ACO-OFDM with OPC records BER $$2.58*10^{-4}$$ 2.58 ∗ 10 - 4 . Simulation results for variable fiber length show BER $$2.20*10^{-1}$$ 2.20 ∗ 10 - 1 for phase conjugated subcarrier coding and $$2.24*10^{-3}$$ 2.24 ∗ 10 - 3 for proposed ACO-OFDM with OPC for multi-mode fiber length 500 m. It also allows different multiframe transmission based on time and wavelength diversity.

中文翻译：

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用于多模光纤中 MIMO 系统的具有光相位共轭的双帧 OFDM

对于光纤中的非线性和色散缓解，作者提出了一种基于光相位共轭的双帧 OFDM 传输。所提出的双帧 OFDM 是对非对称裁剪 OFDM (ACO-OFDM) 帧的修改。所提出的 OFDM 帧由两个正帧组成，第一个是时间压缩的 ACO-OFDM 帧，第二个是第一帧的光相位共轭版本。这增加了系统的带宽效率和总传输功率。对于传统 OFDM 中的电子色散补偿 (EDC)，在需要信道信息的发射机侧应用信号预处理。在为多模光纤设置 OFDM 和多输入多输出 (MIMO) 系统的情况下，信道变得几乎不可预测。建议的双帧 OFDM 在发射机侧不需要 EDC。对于接收光功率 $$-12$$ - 12 dbm 传统 ACO-OFDM 记录误码率 (BER) $$4.48*10^{-1}$$ 4.48 ∗ 10 - 1 和建议的带有 OPC 记录的双帧 ACO-OFDM BER $$2.58*10^{-4}$$ 2.58 ∗ 10 - 4 。可变光纤长度的仿真结果显示 BER $$2.20*10^{-1}$$ 2.20 ∗ 10 - 1 对于相位共轭子载波编码和 $$2.24*10^{-3}$$ 2.24 ∗ 10 - 3 对于建议的 ACO-带有 OPC 的 OFDM，用于多模光纤长度 500 m。它还允许基于时间和波长分集的不同多帧传输。20 * 10 - 1 用于相位共轭副载波编码，$$2.24*10^{-3}$$2.24 * 10 - 3 用于建议的 ACO-OFDM 和 OPC，用于多模光纤长度 500 m。它还允许基于时间和波长分集的不同多帧传输。20 * 10 - 1 用于相位共轭副载波编码，$$2.24*10^{-3}$$2.24 * 10 - 3 用于建议的 ACO-OFDM 和 OPC，用于多模光纤长度 500 m。它还允许基于时间和波长分集的不同多帧传输。