Experimental Demonstration and Evaluation of BCH-Coded UWOC Link for Power-Efficient Underwater Sensor Nodes

Mobile nodes can encounter many challenges in underwater environments during communication due to turbidity, suspended particles, small bubbles, and turbulence. These factors cause absorption scattering, ultimately corrupting optical signals. Error-correcting codes be used correct certain corrupted bits thus reduce the errors a channel. In this work, Bose-Chaudhuri-Hocquenghem (BCH) (31, 16)-coded wireless (UWOC) system is proposed enhance performance between power-efficient sensor nodes. The BCH-coded needs reasonable amount of computing capability powered by battery, enabling node have an on-site data processing unit untethered communication. encoder decoder algorithms BCH code are implemented on Embedded C software coded run Atmel ATmega128A micro-controller. system’s evaluated emulating effects scattering absorption, noise surrounding ambient light, air turbulence natural environment. Moreover, 0.5 Mbps link achieves 93.5% PSR, which 6% better than that uncoded system, at moderate turbidity level 64 NTU, presence weak (induced pump 2.5 L/min displacement rate) bubbles (generated aerating jet airflow rate about 1.2 L/min).