Non‐linear modelling and distortion compensation in optical Fast‐orthogonal frequency division multiplexing systems

Fast-OFDM-based intensity-modulation and direct-detection (IM/DD) has been proposed for deployment of cost-efficient optical access networks, due to its implementation simplicity high spectral efficiency. In this article, the accuracy generalised memory polynomial (GMP) non-linear modelling Fast-OFDM links is studied, including effects considering different model parameters. After validation using measured data a 10 km single mode fibre link, GMP used performance investigations distortion compensation approach Fast-OFDM, up 16PAM modulation formats number subcarriers. This study firstly reports results 16PAM-Fast-OFDM systems either 2PAM- or 4PAM-based training signals digital post-distortion FFT-based channel estimation, investigates influence zero padding (ZP) length on Fast-OFDM. Excellent improvements are achieved scheme, relative conventional system implementation.