39.54 Gbps Underwater Visible Light Communication Utilizing a Distributed Equalizer and Dual-polarization Receiver

In this paper, we propose a distributed transceiver scheme based on the least mean square (LMS) method and a Volterra filter. Through an under-compensation algorithm for pre-equalization of transmit signals, the signal processing burden at the receiver is reduced. This approach is combined with wavelength division multiplexing (WDM) to realize a high-speed underwater visible light communication (UVLC) system. Additionally, the system employs circularly polarized light for transmission and utilizes a polarization diversity reception scheme with signal combining. The system achieves a high-speed transmission rate of 39.54 Gbps over a 5meter underwater channel.