Phase Noise Compensation Algorithm of CO-OFDM System Based on Unscented Kalman Filter

Yuejun, 董月军 Dong; Yingjie, 唐英杰 Tang; Hongliang, 任宏亮 Ren; Jin, 卢瑾 Lu; Yali, 覃亚丽 Qin; Shuqin, 郭淑琴 Guo; Weisheng, 胡卫生 Hu

doi:10.3788/cjl201744.1106010

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“…Additionally, simulation results indicated that as the subcarrier spacing decreases and the number of subcarriers increases, existing DSP algorithms struggled to fully mitigate rotation and noise in constellation diagrams. In an ideal state without FO challenges, attention will be given to the high peak-to-average power ratio (PAPR) issues in OFDM systems incorporating multi-carrier features as well as improving phase noise estimation and compensation algorithms such as those based on Kalman filtering 12 .…”

Section: Conclusion and Discussionmentioning

confidence: 99%

Analysis on the laser linewidth tolerance for uplink in coherent OFDMA-PON system

Liu,

Li,

Luo

et al. 2024

Advanced Fiber Laser Conference (AFL2023)

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Low-cost optical access networks have the capability to fulfill the requirements of industrial passive optical networks (PONs) that demand high capacity and flexible scheduling. Techniques such as multiplexing and coherent detection enhance system sensitivity, although an increase in users also results in elevated costs. Injection locking technology aims to effectively address this challenge. We have conducted measurements on the locking range, verified the linewidth control of the main laser over the slave laser in an injection-locked state, and investigated the linewidth tolerance of a multi-user OFDMA-PON system. Simulation results indicated that the linewidth tolerance of 100G bit/s 16QAM OFDMA system with 64/2048 subcarriers is approximately 5.9MHz/45KHz for multiple ONU scheme, with forward error correction (FEC) limit = 10e-3 and receiver optical power (ROP) = -24dBm which reconcile with offline experimental parameters.

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Section: Conclusion and Discussionmentioning

confidence: 99%