Dual-Branch Pre-Distorted Enhanced ADO-OFDM for Full-Duplex Underwater Optical Wireless Communication System

In this paper, dual-branch pre-distorted enhanced asymmetrically clipped direct current (DC) biased optical orthogonal frequency division multiplexing (PEADO-OFDM) for underwater wireless communication (UOWC) is firstly proposed and simulated. The performances of PEADO-OFDM on the channel model (UOCM) are analyzed further compared with typical ADO-OFDM. Using Monte Carlo method modeling UOCM, we adopt a double-gamma function to represent three different water qualities including clear, coastal harbor waters. full-duplex architecture enables removal Hermitian symmetry (HS) from conventional OFDM can increase spectral efficiency at cost hardware complexity. A new transmitter also reduce complexity transmitter. simulation results exhibit that our scheme outperforms ADO-OFDM in efficiency, bit error rate (BER) stability over channels qualities.