On the Performance of SPAD-Based Optical Wireless Communication With ACO-OFDM

The nonlinear distortion introduced by the dead time strongly limits throughput of highly sensitive SPAD-based optical wireless communication (OWC) systems. Optical OFDM can be employed in systems with SPAD arrays to improve spectral efficiency. In this work, a theoretical performance analysis OWC system asymmetrically-clipped (ACO-OFDM) is presented. impact nonlinearity on investigated. addition, comparison considered scheme DCO-OFDM presented showing distinct reliable operation regimes two schemes. low power regimes, ACO-OFDM outperforms around 4 dB gain achieved 16-QAM over 4-QAM DCO-OFDM. However, turn more preferable high which extends maximal tolerable received 7.4 dB.