128-Gbaud PAM4 O-Band Transmission Using Advanced MLSE with Simple LLR Calculation for SD-FEC Scheme
- Resource Type
- Conference
- Authors
- Yamamoto, Shuto; Taniguchi, Hiroki; Masuda, Akira; Nakamura, Masanori; Kisaka, Yoshiaki
- Source
- 2023 Optical Fiber Communications Conference and Exhibition (OFC) Optical Fiber Communications Conference and Exhibition (OFC), 2023. :1-3 Mar, 2023
- Subject
- Communication, Networking and Broadcast Technologies
Photonics and Electrooptics
Maximum likelihood estimation
Bandwidth
Optical fiber communication
Complexity theory
- Language
We propose simple methods to calculate LLR for IM-DD system with MLSE and SD-FEC and show that an advanced MLSE with the LLR calculation methods makes NGMI higher in 128-Gbaud PAM4 in 20-GHz bandwidth limitation.