TY  - GEN
KW  - Fast-OFDM
KW  -  IM/DD systems
KW  -  nonlinear modeling
KW  -  distortion compensation
ID  - discovery10159062
CY  - Porto, Portugal
A1  - Vieira, LC
A1  - Ozan, W
A1  - Mitchell, J
A1  - Darwazeh, I
UR  - https://doi.org/10.1109/CSNDSP54353.2022.9908043
N2  - Fast-OFDM based intensity-modulation and direct-detection (IM/DD) has been proposed for the deployment of cost-efficient optical access networks, due to simple implementation and high spectral efficiency. In this work, the generalized memory polynomial (GMP) is firstly applied to model the nonlinear characteristic of IM/DD Fast-OFDM links, including memory effects. After model validation using measured data of a 10 km single mode fiber link, the GMP is used for performance investigations of a combined clipping and digital post-distortion approach to optical Fast-OFDM, considering both 4PAM and 8PAM modulation formats and different number of Fast-OFDM subcarriers. This work firstly reports performance results of optical 8PAM-Fast-OFDM systems using 2PAM-based training signals for digital post-distortion and FFT-based channel estimation. Excellent performance improvements are achieved using the proposed distortion compensation scheme, relative to conventional system implementation.
AV  - public
EP  - 173
TI  - Modeling and compensation of nonlinear distortion in direct-detection optical Fast-OFDM systems
T3  - International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)
Y1  - 2022/10/06/
SP  - 168
N1  - This version is the author accepted manuscript. For information on re-use, please refer to the publisher?s terms and conditions.
PB  - IEEE
ER  -