The invention discloses a passive time reversal
underwater sound communication method suitable for a mobile platform, wherein at least a
receiver or a sender moves, the same information frame is repeatedly emitted on different position points, and channel transfer functions on different position points have lower correlation. A receiving end carries out pretreatment, such as
frame synchronization, time reversal
convolution, Doppler correction and the like, to a received
signal, then merges a plurality of pretreated signals received on different opposite positions, and recovers emission information by operations, such as
symbol synchronization,
spread spectrum sequence correlation and the like. The invention has the beneficial effects that level correlation of a
underwater sound
communication channel is weakened by using position changes to provide a space
diversity effect for time reversal treatment; the configuration of the time reversal communication
system is lowered, and for the minimum configuration, the receiving end and the sending end are needed to be provided with only one real object
array element respectively. Meanwhile, the same information frame is repeatedly emitted at different time points to obtain the
time diversity effect, thereby obviously improving the reliability of the
underwater sound communication
system in the complex environment.