In this paper, a novel modulation scheme is presented using a coupling of 8 stages with Mach-Zender Modulator (MZM). This design achieves to support up to 320Gbps from 4-QAM to 256-QAM with 50/80/100 Km of distance. In addition, the LDPC codes are implemented as channel coding block with the aim of improve the optical-SNR (OSNR). The system performance is evaluated in terms of BER, interference and transmission rate. The system allows scalability and convergence for future access networks with optical processing as XG-PON. Our design shows a novel result using a (SD-FEC) without DAC-less hardware processing. In this way, a BER=1.11×10-3 for 64-QAM at 240Gbps is achieved.
Penafiel, B., & Ortega, A. (2018). A joint multilevel modulator and robust LDPC codes processing over optical systems by providing solutions for holistc 5G backhaul. In 2017 IEEE 13th Malaysia International Conference on Communications, MICC 2017 (Vol. 2017-November, pp. 197–202). Institute of Electrical and Electronics Engineers Inc. https://doi.org/10.1109/MICC.2017.8311758