差分调制及相干OFDMA-PON系统相位噪声补偿OA
Differential Modulation and Phase Noise Compensation of CO-OFDMA-PON System
[目的]针对多用户的相干光系统上行链路传输场景,文章为提升差分调制在该场景下的可行性,提出了两种改进后的差分方案.[方法]基于 16 阶差分幅度相移键控(DAPSK)调制能够在准稳态下的正交频分复用(OFDM)传输帧内自动消除相差的特性,文章提出了一种采用不同阶差分相位联合调制的方案,并引入扰码器进一步提升了系统性能.[结果]仿真结果表明,在 100 Gbit/s的传输速率下,相比于 16DAPSK调制,差分相位联合调制方案和结合扰码器的差分相位联合调制方案分别为系统带来了约 2 和 3 dB的灵敏度提升.[结论]文章所提两种调制方案的误码率(BER)性能优于原始方案,提高了数据传输的可靠性.
[Objective]Two enhanced differential schemes have been proposed to improve the feasibility of differential modulation in the uplink transmission scenario for multi-user coherent systems.[Methods]Leveraging the inherent capability of 16 Differen-tial Amplitude and Phase Shift Keying(DAPSK)to automatically eliminate phase difference within quasi-steady-state Orthogonal Frequency Division Multiplexing(OFDM)frames,a scheme utilizing different-order differential phase joint modulation is pro-posed.Further performance enhancements are achieved through the incorporation of a scrambler.[Results]Compared with 16DAPSK modulation,the proposed two modulation schemes bring about 2 and 3 dB sensitivity improvement to the system,re-spectively.[Conclusion]The Bit Error Rate(BER)performance of both the joint modulation scheme and the joint modulation scheme with scrambler surpasses that of the original one,thereby enhancing the data transmission reliability.
刘紫玥;李正璇;杨勤尧;高奇;王梁;宋英雄
上海大学特种光纤与光接入网省部共建重点实验室,上海 200444上海大学特种光纤与光接入网省部共建重点实验室,上海 200444上海大学特种光纤与光接入网省部共建重点实验室,上海 200444上海大学特种光纤与光接入网省部共建重点实验室,上海 200444上海大学特种光纤与光接入网省部共建重点实验室,上海 200444上海大学特种光纤与光接入网省部共建重点实验室,上海 200444
信息技术与安全科学
正交频分复用差分幅度相移键控相位噪声补偿线宽容限
OFDMDAPSKphase noise compensationlinewidth tolerance
《光通信研究》 2026 (1)
8-15,8
国家重点研发计划资助项目(2021YFB2900801)上海市科委自主资助项目(22511100902,22511100502)上海市自然科学基金资助项目(20ZR1420900)高等学校学科创新引智计划资助项目(D20031)
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