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

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 signa...

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Bibliographic Details
Published in:Optics express 2016-10, Vol.24 (22), p.25767-25773
Main Authors: Sung, Jiun-Yu, Chow, Chi-Wai, Yeh, Chien-Hung, Chang, Gee-Kung
Format: Article
Language:English
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Summary: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.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.24.025767