TY - JOUR

T1 - Experimental Demonstrations of Hybrid OFDM-Digital Filter Multiple Access PONs

AU - Jin, Wei

AU - Zhong, Zhuqiang

AU - He, Jiaxiang

AU - Sankoh, Abdulai

AU - Giddings, Roger

AU - Hong, Yanhua

AU - Pierce, Iestyn

AU - O'Sullivan, M.

AU - Laperle, C.

AU - Lee, J.

AU - Mariani, G.

AU - Durrant, T.

AU - Tang, Jianming

N1 - DESTINI Project funded by the ERDF; DSP Centre funded by the ERDF through the Welsh Government;

PY - 2020/7/1

Y1 - 2020/7/1

N2 - Hybrid OFDM-digital filter multiple access (OFDM-DFMA) PONs exploit software configurable digital shaping filters in ONUs to multiplex multiple gapless OFDM channels at different radio frequencies and utilize a single FFT operation-based pipelined DSP procedure in the OLT to simultaneously de-multiplex/demodulate all OFDM signals from various ONUs without requiring any digital matching filters. In this paper, aggregated raw 30Gbit/s over 25km multipoint-to-point upstream signal transmissions of IMDD OFDM-DFMA PONs are experimentally demonstrated for the first time. Experimental results show that a reduction in ONU-embedded digital filter length from 256 to 16 just decreases the receiver sensitivity by <1dB, which are independent of ONU spectral locations. By utilizing a digital filter length as short as L=16, fibre transmission impairments (channel interference) are shown to give <1dB (<2.5dB) receiver sensitivity degradations. In addition, a >3.5dB (>5.5dB) ONU launch power dynamic range is also achievable for an aggregated upstream transmission raw capacity of 28.12Gbit/s (23.43Gbit/s).

AB - Hybrid OFDM-digital filter multiple access (OFDM-DFMA) PONs exploit software configurable digital shaping filters in ONUs to multiplex multiple gapless OFDM channels at different radio frequencies and utilize a single FFT operation-based pipelined DSP procedure in the OLT to simultaneously de-multiplex/demodulate all OFDM signals from various ONUs without requiring any digital matching filters. In this paper, aggregated raw 30Gbit/s over 25km multipoint-to-point upstream signal transmissions of IMDD OFDM-DFMA PONs are experimentally demonstrated for the first time. Experimental results show that a reduction in ONU-embedded digital filter length from 256 to 16 just decreases the receiver sensitivity by <1dB, which are independent of ONU spectral locations. By utilizing a digital filter length as short as L=16, fibre transmission impairments (channel interference) are shown to give <1dB (<2.5dB) receiver sensitivity degradations. In addition, a >3.5dB (>5.5dB) ONU launch power dynamic range is also achievable for an aggregated upstream transmission raw capacity of 28.12Gbit/s (23.43Gbit/s).

U2 - https://doi.org/10.1109/LPT.2020.2995072

DO - https://doi.org/10.1109/LPT.2020.2995072

M3 - Article

VL - 32

SP - 751

EP - 754

JO - IEEE Photonics Technology Letters

JF - IEEE Photonics Technology Letters

SN - 1041-1135

IS - 13

ER -