Algorithm for Underwater Weak Light Signal Recovery Based on Time Thresholding

Under long-distance underwater wireless optical communication, a signal recovery algorithm based on time threshold judgment is proposed to receive weak optical signals at the nano-watt level, and the algorithm is simulated by using Field Programmable Gate Array(FPGA). Finally, an experimental platform is built to conduct a performance test, which shows that the use of the algorithm reduces the communication bit error rate(BER) by 17.6 dB under the same test environment. It is significant for the communication quality of underwater wireless optical communication.