@inproceedings{8ea8c0060de84c34b1b0f32a43639494,
title = "ADC/DAC resolution tolerance improvement by implementing probabilistic shaping distributions in PAM and QAM modulation schemes",
abstract = "In this paper, we simulated the ADC/DAC resolution tolerance improvement by implementing probabilistic shaping (PS) distributions in PAM and QAM modulation schemes for 400G and 800G transmissions. We compared PS- and uniformdistributed PM-16QAM, PM-32QAM, and PM-64QAM performance in 800G coherent transmission in FR links. The PS distribution scheme is based on Maxwell-Boltzmann distribution, and 0.1378 FEC overhead is chosen. We demonstrate that for any of these modulation schemes the post-BER (post-FEC bit-error rate) performance is more sensitive to ADC resolution. Moreover, the application of PS distribution can offer us 0.5-dB improvement in received optical power (ROP) for LDPC-coded PM-16QAM and 0.7-dB improvement for PM-32QAM, while PM-64QAM can get 0.6-dB improvement in ROP. For PAM transmission, we simulated a 4-channel CWDM 400G transmission system with wavelengths 1271 nm, 1291 nm, 1311 nm, and 1331 nm for 4-PAM modulation scheme. The PS distribution scheme we used in PAM is exponential distribution, and the FEC overhead is also 0.1378. We demonstrated that the pre-SER (pre-FEC symbol-error rate) performance is also more sensitive to the ADC resolution compared to DAC resolution. Therefore, the PS LPDCcoded modulation represents a great candidate to improve the system performance and reduce the cost.",
keywords = "400G CWDM transmission, 800G, DAC/ADC resolution, PAM4, PM-16QAM, PM-32QAM, PM-64QAM, PS distribution, coherent detection",
author = "Xiao Han and Yang Yue and Zhen Qu and Ryan Holmes and Djordjevic, {Ivan B.}",
note = "Publisher Copyright: {\textcopyright} 2021 SPIE.; Metro and Data Center Optical Networks and Short-Reach Links IV 2021 ; Conference date: 06-03-2021 Through 11-03-2021",
year = "2021",
doi = "10.1117/12.2583215",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Srivastava, {Atul K.} and Madeleine Glick and Youichi Akasaka",
booktitle = "Metro and Data Center Optical Networks and Short-Reach Links IV",
}