Target passive location by time reversal mirror using vertical array

The technology of time reversal mirror passive localization is a coherent source spatially and temporally refocused method, which also can positioning object without priori information about ocean itself. Four implementations for array passive time reversal mirror (APTRM) localization technology are studied. Pool experiments and sea trials have carried out, and the results validate the feasibility and practicability of this technology. The researches indicate that environmental noise can be depressed effectively by the implementation using synthetically cross-correlation method, and the pseudo focus coursed by environment mismatch can be cut down by the improved implementations. The results also provide that the improved implementations for APTRM have good robustness and better anti-isotropic interfere ability.