论文标题
容量和可实现的褪色速度，几种模式MIMO IM/DD光纤通道
Capacity and Achievable Rates of Fading Few-mode MIMO IM/DD Optical Fiber Channels
论文作者
论文摘要
每个空间路径的光纤多输入多输出（MIMO）通道具有强度调制和直接检测（IM/DD）。空间尺寸代表用于传输的多种模式，它们之间的串扰起源于多路复用器和多路复用器，这些模式取决于极化，因此时间变化。自由空间IM/DD MIMO通道的上限适用于纤维情况，并且使用Blahut-Arimoto算法对星座约束容量进行了建设性的估算。然后，提出了自动编码器，以假设发射器处的通道分布知识来优化实用的MIMO传输。预编码器证明通道的变化是鲁棒的。
The optical fiber multiple-input multiple-output (MIMO) channel with intensity modulation and direct detection (IM/DD) per spatial path is treated. The spatial dimensions represent the multiple modes employed for transmission and the cross-talk between them originates in the multiplexers and demultiplexers, which are polarization dependent and thus timevarying. The upper bounds from free-space IM/DD MIMO channels are adapted to the fiber case, and the constellation constrained capacity is constructively estimated using the Blahut-Arimoto algorithm. An autoencoder is then proposed to optimize a practical MIMO transmission in terms of pre-coder and detector assuming channel distribution knowledge at the transmitter. The pre-coders are shown to be robust to changes in the channel.
