Affiliation:
1. Sun Yat-Sen University
2. Soochow University
3. Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)
Abstract
Maximum likelihood sequence estimation (MLSE) is an optimal solution to realize sequence detection in the digital signal processing (DSP) of short reach O-band intensity modulation/direct detection (IM/DD) systems with bandwidth limitation. However, traditional MLSE requires relatively high computational complexity for short reach optical interconnect. Although the computational complexity of single-symbol sequence detection is quite low, the capability of combating with the inter symbol interference (ISI) is inadequate. To combine the low computational complexity of single-symbol sequence detection with the high reliability of multi-symbol sequence detection in MLSE, decision region partition aided MLSE (DRP-MLSE) is proposed and verified with 60-Gbaud and 65-Gbaud PAM-4 IM/DD systems over 40-km single-mode fiber (SMF) transmission. The experimental results show that the DRP-MLSE can realize similar performance of conventional MLSE with negligible penalty and significantly lower computational complexity.
Funder
Key-Area Research and Development Program of Guangdong Province
National Natural Science Foundation of China
Local Innovation and Research Teams Project of Guangdong Pearl River Talents Program
Fundamental and Applied Basic Research Project of Guangzhou City under Grant
Open Fund of IPOC
Subject
Atomic and Molecular Physics, and Optics
Cited by
2 articles.
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