Research on Passive Positioning Technology of Time Reversal Mirror Based on Submerged Single Vector Sensor

The vector sensor is a new type of sonar in recent years, and the vector signal processing technology has also been developed. The vector sensor can simultaneously pick up the acoustic pressure and particle velocity information in the acoustic field at a common point. The vector sensor can suppress the isotropic noise field. Only a single vector sensor can complete the target azimuth estimation. However, single vector sensor cannot complete target positioning based on acoustic pressure and particle velocity information alone, and other environmental information needs to be combined. The time reversal mirror (TRM) technology in underwater acoustics comes from the phase conjugation method in optics, which is a positioning technology. The TRM is used in the field of active sonar firstly. With the gradual maturity of the modeling of multi-path acoustic propagation in the underwater waveguide environment, passive positioning technology based on virtual TRM can be realized. With the development of vector signal processing technology, the performance of TRM can be effectively improved. In recent years, research in the field of passive TRM has mainly focused on the underwater communication. Research on the passive positioning technology of TRM is lacking. Under the above background, this paper studies the passive positioning technology of TRM based on single vector sensor.