Vector sensor-based orthogonal frequency division multiplexing (OFDM) underwater sound communication method

The invention discloses a vector sensor-based orthogonal frequency division multiplexing (OFDM) underwater sound communication method, which comprises that: a receiver uses a vertical receiving array consisting of M vector sensors of which each comprises an acoustic pressure channel and at least a vertical vibration velocity channel; after frame synchronizing signals are captured, frequency-domain passive time reversal processing is performed on the acoustic pressure channel and the vertical vibration velocity channel to combine the data of each channel into a path; and OFDM channel estimation and equalization processing are performed to finally recover original information. The vector sensor-based OFDM underwater sound communication method has the advantages that: the vector sensors form the receiver of an OFDM communication system to provide conditions for space diversity required by the time reversal processing by utilizing weak correlation between an acoustic pressure and a vertical vibration velocity component, and the vector sensor array replaces a conventional acoustic pressure array under the condition of the same receiving array size so as to remarkably improve communication performance.