Zhou Xian, Zhong Kangping, Gao Yuliang, Sui Qi, Dong Zhenghua, Yuan Jinhui, Wang Liang, Long Keping, Lau Alan Pak Tao, Lu Chao
Opt Express. 2015 Apr 6;23(7):8409-21. doi: 10.1364/OE.23.008409.
Discrete multi-tone (DMT) modulation is an attractive modulation format for short-reach applications to achieve the best use of available channel bandwidth and signal noise ratio (SNR). In order to realize polarization-multiplexed DMT modulation with direct detection, we derive an analytical transmission model for dual polarizations with intensity modulation and direct diction (IM-DD) in this paper. Based on the model, we propose a novel polarization-interleave-multiplexed DMT modulation with direct diction (PIM-DMT-DD) transmission system, where the polarization de-multiplexing can be achieved by using a simple multiple-input-multiple-output (MIMO) equalizer and the transmission performance is optimized over two distinct received polarization states to eliminate the singularity issue of MIMO demultiplexing algorithms. The feasibility and effectiveness of the proposed PIM-DMT-DD system are investigated via theoretical analyses and simulation studies.
离散多音频（DMT）调制是一种有吸引力的调制格式，适用于短距离应用，以实现对可用信道带宽和信噪比（SNR）的最佳利用。为了实现具有直接检测的偏振复用DMT调制，我们在本文中推导了一种用于双偏振强度调制和直接检测（IM-DD）的解析传输模型。基于该模型，我们提出了一种具有直接检测的新型偏振交织复用DMT调制（PIM-DMT-DD）传输系统，其中可以通过使用简单的多输入多输出（MIMO）均衡器来实现偏振解复用，并且在两个不同的接收偏振状态上优化传输性能以消除MIMO解复用算法的奇异性问题。通过理论分析和仿真研究，对所提出的PIM-DMT-DD系统的可行性和有效性进行了研究。
