论文标题
用于光纤通信的矫形四维7位/4D-SYM调制的分析和实验证明
Analysis and Experimental Demonstration of Orthant-Symmetric Four-dimensional 7 bit/4D-sym Modulation for Optical Fiber Communication
论文作者
论文摘要
我们提出了一种新的四维晶体对称128-ARY调制格式（4D-OS128），光谱效率为7bit/4d-Sym。 The proposed format fills the gap between polarization-multiplexed 8- and 16-ary quadrature-amplitude modulation (PM-8QAM and PM-16QAM).Numerical simulations show that 4D-OS128 outperforms two well-studied 4D geometrically-shaped modulation formats: 128SP-16QAM and 7b4D-2A8PSK by up to 0.65dB for bit-interleaved在相同的光谱效率下进行的编码调制。这些收益在11美元$ \ times $ 233Gbit/s波长的多路复用（WDM）传输系统中分别以5.95位/4D-SYM运行，分别为6000 km，仅EDFA和Hybrid扩增场景，分别为9000 km和9000 km。相对于128-ARY设定分区16QAM，达到15％的范围。此外，还将提出的4D-OS128与$ \ boldsymbol {d} _4 $基于晶状体的星座和概率形状的16QAM和有限的块长度通过仿真进行了比较。
We propose a new four-dimensional orthant-symmetric 128-ary modulation format (4D-OS128) with a spectral efficiency of 7bit/4D-sym. The proposed format fills the gap between polarization-multiplexed 8- and 16-ary quadrature-amplitude modulation (PM-8QAM and PM-16QAM).Numerical simulations show that 4D-OS128 outperforms two well-studied 4D geometrically-shaped modulation formats: 128SP-16QAM and 7b4D-2A8PSK by up to 0.65dB for bit-interleaved coded modulation at the same spectral efficiency. These gains are experimentally demonstrated in a 11$\times$233Gbit/s wavelength division multiplexing (WDM) transmission system operating at 5.95 bit/4D-sym over 6000km and 9000km for both EDFA-only and hybrid amplification scenarios, respectively. A reach increase of 15% is achieved with respect to 128-ary set-partitioning 16QAM. Furthermore, the proposed 4D-OS128 is also compared to $\boldsymbol{D}_4$ lattice-based constellation and probabilistically-shaped 16QAM with finite blocklength via simulation.
