Open AccessNovel OBI noise reduction technique by using similar-OBI estimation in optical multiple access uplink
Author(s) -
Hyoung Joon Park,
Sun Young Jung,
Sang Kook Han
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.020860
Subject(s) - noise reduction , noise (video) , telecommunications link , optics , computer science , signal to noise ratio (imaging) , phase noise , physics , electronic engineering , telecommunications , acoustics , engineering , artificial intelligence , image (mathematics)
A novel optical beat interference (OBI) noise reduction technique for optical multiple access uplink using the same wavelength is presented. The OBI noise is estimated by similar-OBI and mitigated by subtracting estimated OBI noise using the digital signal processing technique. To derive similar-OBI, an RF clipping tone is transmitted out of signal band. We numerically and experimentally verified the validity of proposed OBI noise reduction method in orthogonal frequency division multiplexing access (OFDMA) passive optical network (PON) uplink where the OBI noise has been reduced and signal to noise ratio (SNR) has been improved from 4.4 dB to 10.6 dB.