Underwater wireless optical communication backscattering suppression method based on asynchronous superposition

The invention discloses an underwater wireless optical communication backscattering suppression method based on asynchronous superposition, and belongs to the technical field of communication digital signal processing. In the method, photoelectric detectors at a transmitting end and a receiving end simultaneously receive back scattering interference signals from own ends and target signals from an opposite end, and superposition signals at the receiving end are divided into different observation units and modeled as a hidden Markov process by utilizing asynchronous time delay between a link at the end and a link at the opposite end; a known backscattering signal is simplified into a state transition process among different observation units, so that an opposite-end target signal is recovered by using Viterbi decoding after channel estimation is completed. According to the invention, the backscattering interference suppression effect of full-duplex underwater wireless optical communication under long-distance