Anti Interference Algorithm for Deep Water Submarine Communication Based on Time Reversal Mirror Inversion

SUN Bo; WANG Rui

doi:10.3969/j.issn.1672-9730.2016.02.011

Abstract：Deepwater submarine communication is a spread spectrum communication .Inner symbol interference can be genetrated in the process of spread spectrum code sequence generation at the recieving end ,which needs to suppress inner symbol interference and reduce the bit error rate of the recieved bit sequence .In the traditional method ,the time‐frequency focusing filtering algorithm is used to filter inter‐code interference .Because of the nonlinearity of the time‐frequency charac‐teristics of the secondary communication signal ,the filtering performance is not good .A suppression algorithm for the inter‐ference suppression of the deep water to the submarine communication is proposed based on the passive mirror inversion . Deepwater submarine communication spread spectrum channel model and a communication signal model are constructed ,the mirror reversal technology is used to achieve efficient estimation of the channel ,and the communication information transmis‐sion receiving array element of the multipath components are adjusted to decompose the interference signals into signal and time reversal mirror negative signal ,and then sign splicing ,multipath signal compression to get the focusing gain and elimi‐nate inter symbol interference(ISI) .The simulation results show that the proposed algorithm can improve the focusing per‐formance of the potential communication system and reduce the bit error rate .