Abstract
Among all the variants of optical orthogonal frequency-division multiplexing (OFDM) systems, coherent optical OFDM (CO-OFDM) offers the ultimate performance in spectral efficiency, receiver sensitivity, and polarization or chromatic dispersion tolerance. The incorporation of the 2 × 2 multiple-input multiple-output OFDM (MIMO-OFDM) opens avenues for doubling the spectral efficiency while providing polarization dispersion and rotation robustness. Because CO-OFDM uses digital-to-analog converters (DACs) at the transmitter and unique pilot subcarrier-based channel and phase estimation, it offers an extremely convenient way to achieve high spectral efficiency transmission through higher order modulation. CO-OFDM has emerged as the attractive modulation format for 100 Gb/s and beyond due to its high spectral efficiency and resilience to fiber dispersion. The superior computational efficiency of CO-OFDM that scales very well over speed and dispersion enables its smooth migration to a higher data rate of 400 Gb/s and beyond. More important, CO-OFDM is a rate-agnostic modulation format in which the hardware and software can be ported seamlessly from the current generation to the next one whenever transmission speed is upgraded. This is in contrast to other conventional single-carrier modulation formats, with which, as the network evolves and migrates, a complete change of the transceiver design, and at times even the link design, is mandated.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
