Performance of Underwater Visible Light Communication (UVLC) using Quasi Cyclic Low-Density Parity Check (QC-LDPC)

This research proposed the performance of Underwater Visible Light Communication (UVLC) system using Quasi Cyclic Low-Density Parity Check (QC-LDPC), by comparing it with Regular Low-Density Parity Check (R-LDPC) and the uncoded system. The transmission medium that used in this simulation is a clear ocean channel and uses a 500 nm wavelength as the transmitter. We consider to use simple modulation using On-off Keying Non-return to Zero (OOK-NRZ). Based on the extensive simulation with propagation distance 1–10 m, we found that UVLC system using QC-LDPC codes improved system performance with an optimum BER distance of 8% compared to R-LDPC and 17.39% compared to uncoded system. In addition, for SNR performance of UVLC system using QC-LDPC obtained an advantage of ±1 dB compared to R-LDPC and ±2 dB compared to uncoded system.