Constellation shaping in optical transport network

Dekun Zhou; Lei Li; Qiang Rao; Tao He; Zheng Zhou; Jun Sun; Pu Chen; Peng Zhan; Lu Ye; Yi Tang; Yi He; Junxi Wang; Hanlin Jiao; Jinhua Zhang; Jingru Li; Shuo Yang; Jing Dai

doi:10.1117/12.2576240

5 November 2020 Constellation shaping in optical transport network

Dekun Zhou, Lei Li, Qiang Rao, Tao He, Zheng Zhou, Jun Sun, Pu Chen, Peng Zhan, Lu Ye, Yi Tang, Yi He, Junxi Wang, Hanlin Jiao, Jinhua Zhang, Jingru Li, Shuo Yang, Jing Dai

Author Affiliations +

Proceedings Volume 11569, AOPC 2020: Optical Information and Network; 1156905 (2020) https://doi.org/10.1117/12.2576240
Event: Applied Optics and Photonics China (AOPC 2020), 2020, Beijing, China

Abstract

In the optical transport network, the high-dimension equiprobable constellation is used to increase the information transmission rate and the forward error correction code is used to improve the system performance. However, adopting the equiprobable constellation will lead to some information loss according to the Shannon theory and the performance of the FEC code needs to be strengthened. Based on this, unequiprobable constellation is designed to reduce the information loss by optimizing the probability of the first bit taking the value zero or one. In order to further improve the system performance, polar code, an advanced channel code with good performance and low decoding computation complexity, is combined with the probabilistic shaping to realize the unequiprobable constellation in this paper. The simulation results show that the unequiprobable constellation can provide nearly 1dB gain compared to the equiprobable constellation.

Citation Download Citation

Dekun Zhou, Lei Li, Qiang Rao, Tao He, Zheng Zhou, Jun Sun, Pu Chen, Peng Zhan, Lu Ye, Yi Tang, Yi He, Junxi Wang, Hanlin Jiao, Jinhua Zhang, Jingru Li, Shuo Yang, and Jing Dai "Constellation shaping in optical transport network", Proc. SPIE 11569, AOPC 2020: Optical Information and Network, 1156905 (5 November 2020); https://doi.org/10.1117/12.2576240

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