Accumulation of nonlinear interference noise in probabilistically shaped 64-quadrature amplitude modulation systems
Accumulation of nonlinear interference noise in probabilistically shaped 64-quadrature amplitude modulation systems
复制标题
概率整形 64 正交调幅系统中非线性干扰噪声的累积
DOI：
10.1117/1.oe.58.4.046102
复制
发表时间：
2019
影响因子：
1.3
通讯作者：
Yongjun Wang
中科院分区：
文献类型：
--
作者：
Linan Li;Qi Zhang;X. Xin;Yongjun Wang
抽象。提出了一种有效的方法来评估调制格式对概率整形的28 Gbaud 64-正交幅度调制（QAM）波分复用（WDM）系统中非线性干扰噪声（NLIN）积累的影响。整形后的符号序列由速率自适应方案产生，速率自适应方案连接恒定成分分布匹配器和系统前向纠错编码器。基于Maxwell-Boltzmann的成形分布和具有相同净比特率的均匀分布被考虑。使用精确的增强型调制相关高斯噪声模型来仿真NLIN方差。考虑到调制的高阶标准化矩的影响，使用所提出的程序确定NLIN方差对概率成形的依赖性。此外，NLIN方差的增加，在均匀输入的整形证明。对于一个双偏振（DP）满载的C波段WDM光纤系统的信道间隔为37.5 GHz，概率整形导致减少0.036的比例内和通道间的贡献，非线性噪声均匀64-QAM为1500公里的距离。最后，对于在1500 km传输上具有DP概率整形的64-QAM输入的九个信道，与集总放大相比，分布式放大使得归一化NLIN功率的累积减少2.54 dB。
Abstract. An efficient procedure is presented for evaluating the effects of modulation format on the accumulation of nonlinear interference noise (NLIN) in probabilistically shaped 28 Gbaud 64-quadrature amplitude modulation (QAM) wavelength division multiplexed (WDM) systems. The shaped symbol sequences are generated by the rate adaptive scheme concatenating a constant composition distribution matcher and a systematic forward error correction encoder. A shaping distribution based on the Maxwell–Boltzmann and the uniform distribution with the same net bit rate is considered. The NLIN variance is emulated using the accurate enhanced modulation-dependent Gaussian noise model. Accounting for the impact of higher-order standardized moments of the modulation, the dependence of NLIN variance on probabilistic shaping is determined using the proposed procedure. In addition, an increase in NLIN variance for shaping over uniform input is demonstrated. For a dual polarization (DP) fully loaded C-band WDM optical fiber system with a channel spacing of 37.5 GHz, probabilistic shaping leads to a reduction of 0.036 in the ratio of intrachannel and interchannel contributions to nonlinear noise over uniform 64-QAM for a 1500-km distance. Finally, for nine channels with DP probabilistically shaped 64-QAM input over 1500-km transmission, distributed amplification enables a reduction of 2.54 dB in the accumulation of normalized NLIN power compared to lumped amplification.
5/6 长期运动对肾切除慢性肾衰竭模型大鼠低血压和NO产生影响的检验
DOI：
--
发表时间：
2013
期刊：
影响因子：
--
作者：
金 鍾宇;森 信芳;田村由馬;中村貴裕;徐 斌;山越聖子;伊藤 修;上月正博
通讯作者：
上月正博