网格编码调制星座整形相位共轭孪生波方案  

Trellis coding modulation constellation shaping phase conjugate twin wave scheme

作　　者：张钰[1] 杜建新 辛雅洁 王陈 ZHANG Yu;DU Jianxin;XIN Yajie;WANG Chen(College of Electronic and Optical Engineering&College of Flexible Electronics,Nanjing University of Posts&Telecommunications,Nanjing 210046,China)

机构地区：[1]南京邮电大学电子与光学工程学院、柔性电子(未来技术)学院,南京210046

出　　处：《光通信技术》2024年第6期75-81,共7页Optical Communication Technology

基　　金：江苏省高校自然科学研究面上项目(16KJB510033)资助。

摘　　要：为了进一步提升正交频分复用(OFDM)在密集波分复用(DWDM)光纤通信系统中的表现,提出了一种基于16进制振幅移相键控(16APSK)的多维网格编码调制(TCM)星座整形相位共轭孪生波(PCTW)方案,并设计了一种基于OFDM子载波的多维哈夫曼概率整形(PS)方法。通过使用Matlab与OptiSystem构建仿真平台,对比分析了实施星座整形前后的系统性能。仿真实验结果表明:相比于未采用任何星座整形技术的系统,引入多维哈夫曼PS和几何整形策略后系统的频谱效率虽有所下降(减少了0.04),但误符号率显著降低了10.7 dB。In order to further improve the performance of orthogonal frequency division multiplexing(OFDM)in dense wavelength division multiplexing(DWDM)fiber optic communication systems,a multi-dimensional trellis coding modulation(TCM)constellation shaping phase conjugate twin waves(PCTW)scheme based on hexadecimal amplitude phase shift keying(16APSK)is proposed,and a multi-dimensional Huffman probability shaping(PS)method based on OFDM subcarriers is designed.By using Matlab and OptiSystem to build a simulation platform,the system performance before and after implementing constellation shaping is compared and analyzed.The simulation experiment results show that compared with the system without any constellation shaping technology,the introduction of multidimensional Huffman PS and geometric shaping strategy reduces the spectral efficiency of the system by 0.04,but significantly reduces the symbol error rate by 10.7 dB.

关 键 词：密集波分复用 振幅移相键控 网格编码调制 相位共轭孪生波 概率整形 

分 类 号：TN929[电子电信—通信与信息系统]