Low-complexity Forward Error Correction For 800G Unamplified Campus Link
Kai Tao, Zhijun Long, Weifeng Qian, Zitao Wei, Xinda Chen, Weiming Wang, Yan Xia · 2022 20th International Conference on Optical Communications and Networks (ICOCN) · 2022
The discussion about forward error correction (FEC) used for 800G unamplified link (800LR) is ongoing. Aiming at two potential options for FEC bit error ratio (BER) threshold, we propose two FEC schemes, respectively based on channel-polarized (CP) multilevel coding (MLC) and bit interleaved coded modulation (BICM), with the same inner FEC code. The field-programmable gate array (FPGA) verification results indicate that with the same FEC overhead (OH), proposed CP-MLC outperforms BICM scheme with less resource and power consumption.