Two-level modulation scheme to reduce latency for optical mobile fronthaul networks

Jiun Yu Sung, Chi Wai Chow*, Chien Hung Yeh, Gee Kung Chang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


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.

Original languageEnglish
Pages (from-to)25767-25773
Number of pages7
JournalOptics Express
Issue number22
StatePublished - 31 Oct 2016

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