TY - GEN
T1 - Colored-Noise Suppressed Decision Feed-Forward Equalizer for Passive Optical Networks
AU - Chen, Sai
AU - Zhou, Ji
AU - Wang, Haide
AU - Liu, Mark
AU - Lu, Qingxin
AU - Liu, Weiping
AU - Yu, Changyuan
N1 - Publisher Copyright:
© 2024 IEEE.
PY - 2024/11
Y1 - 2024/11
N2 - Driven by bandwidth-hungry applications, 50G passive optical network (PON) has been standardized towards the upstream line rates of 25Gb/s (asymmetric mode) or 50Gbps (symmetric mode). For the asymmetric mode of 50G PON, the legacy 10G-class components with limited bandwidth can be reused with digital signal processing to achieve the upstream line rate of 25Gb/s and maintain cost efficiency. To deal with the limited bandwidth-induced inter-symbol interference (ISI), the feed-forward equalizer (FFE) is the most commonly used. However, the in-band noise will be colored and amplified after using FFE, which will degrade the performance. This paper proposes the decision FFE (DFFE) to deal with the limited bandwidth-induced ISI and suppress the colored noise. The experimental results of the 25Gb/s on-off keying using 10G-class components show approximately 0.5dB improvement in receiver sensitivity at 20% soft-decision forward error correction limit after using DFFE compared to FFE.
AB - Driven by bandwidth-hungry applications, 50G passive optical network (PON) has been standardized towards the upstream line rates of 25Gb/s (asymmetric mode) or 50Gbps (symmetric mode). For the asymmetric mode of 50G PON, the legacy 10G-class components with limited bandwidth can be reused with digital signal processing to achieve the upstream line rate of 25Gb/s and maintain cost efficiency. To deal with the limited bandwidth-induced inter-symbol interference (ISI), the feed-forward equalizer (FFE) is the most commonly used. However, the in-band noise will be colored and amplified after using FFE, which will degrade the performance. This paper proposes the decision FFE (DFFE) to deal with the limited bandwidth-induced ISI and suppress the colored noise. The experimental results of the 25Gb/s on-off keying using 10G-class components show approximately 0.5dB improvement in receiver sensitivity at 20% soft-decision forward error correction limit after using DFFE compared to FFE.
KW - colored noise
KW - decision feedforward equalizer
KW - feed-forward equalizer
KW - inter-symbol interference
KW - Passive optical network
UR - https://www.scopus.com/pages/publications/85214994434
U2 - 10.1109/ACP/IPOC63121.2024.10810121
DO - 10.1109/ACP/IPOC63121.2024.10810121
M3 - Conference article published in proceeding or book
AN - SCOPUS:85214994434
T3 - Asia Communications and Photonics Conference, ACP
SP - 1
EP - 4
BT - 2024 Asia Communications and Photonics Conference, ACP 2024 and International Conference on Information Photonics and Optical Communications, IPOC 2024
PB - Optica Publishing Group (formerly OSA)
T2 - 2024 Asia Communications and Photonics Conference, ACP 2024 and International Conference on Information Photonics and Optical Communications, IPOC 2024
Y2 - 2 November 2024 through 5 November 2024
ER -