Application of chaotic sequence in deep sea multi-beam and multi-Ping transmission

Phased transmission based on beamforming method can transmit signals in different directions with small delay and continuous high Ping-rate. Due to the change of the layered structure of seafloor sediments, the echo signal aliasing effect is easy to occur at the receiving end. In this paper, chaotic sequence is proposed to solve this problem, and the screening process and coding model of chaotic sequence are established. The correlation characteristics of Logistic sequence, Tent sequence and Chebyshev sequence are analyzed, and it is determined that Chebyshev sequence has the best correlation performance among them. Chebyshev sequence is used to generate frequency modulation sequence, and the simulation and pool experiments are carried out to verify the effective separation ability of chaotic frequency modulation coding signal to echo signal aliasing.