Towards Low Computational Complexity for Neural Network-Based Equalization in PAM4 Short-Reach Direct Detection Systems by Multi-Symbol Prediction
- Resource Type
- Conference
- Authors
- Xu, Zhaopeng; Sun, Chuanbowen; Dong, Shuangyu; Manton, Jonathan H.; Shieh, William
- Source
- 2021 Optical Fiber Communications Conference and Exhibition (OFC) Optical Fiber Communications Conference and Exhibition (OFC), 2021. :1-3 Jun, 2021
- Subject
- Communication, Networking and Broadcast Technologies
Photonics and Electrooptics
Equalizers
Artificial neural networks
Real-time systems
Optical fiber communication
Computational complexity
- Language
We propose NN-based multi-symbol equalization for a 50-Gb/s PAM4 direct-detection link which significantly reduces computational complexity without sacrificing BER performance of conventional single-output NNs. Complexity reduction of 42.7% is achieved when 8 outputs are selected.