Open AccessTwo-level modulation scheme to reduce latency for optical mobile fronthaul networks
Author(s) -
Jiun-Yu Sung,
ChiWai Chow,
Chien Hung Yeh,
Gee Kung Chang
Publication year - 2016
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.24.025767
Subject(s) - passive optical network , orthogonal frequency division multiplexing , computer science , amplitude shift keying , photodiode , electronic engineering , quadrature amplitude modulation , modulation (music) , latency (audio) , wavelength division multiplexing , low latency (capital markets) , bit error rate , telecommunications , computer network , optics , physics , phase shift keying , engineering , decoding methods , wavelength , channel (broadcasting) , acoustics
A system using optical two-level orthogonal-frequency-division-multiplexing (OFDM) - amplitude-shift-keying (ASK) modulation is proposed and demonstrated to reduce the processing latency for the optical mobile fronthaul networks. At the proposed remote-radio-head (RRH), the high data rate OFDM signal does not need to be processed, but is directly launched into a high speed photodiode (HSPD) and subsequently emitted by an antenna. Only a low bandwidth PD is needed to recover the low data rate ASK control signal. Hence, it is simple and provides low-latency. Furthermore, transporting the proposed system over the already deployed optical-distribution-networks (ODNs) of passive-optical-networks (PONs) is also demonstrated with 256 ODN split-ratios.