An automatic underwater acoustic target azimuth tracking method to prevent tracking deviation

Abstract

The invention provides an automatic underwater acoustic target azimuth tracking method for preventing tracking deflection. The method comprises the steps of (1), acquiring an underwater acoustic target azimuth history chart; (2), performing singular value decomposition on the acquired underwater acoustic target azimuth history chart, and using a mapping space which corresponds with a highest singular value that is obtained through decomposition as a first sub-space; (3), acquiring a main atlas P of the underwater acoustic target azimuth information based on information which is mapped to the first sub-space; and (4), performing automatic tracking of the underwater acoustic target based on the track on the main atlas P of the underwater acoustic target azimuth information. The tracking method according to the invention can effectively prevent tracking deflection in tracking the underwater acoustic signal and furthermore improves tracking accuracy.

Description

technical field [0001] The invention relates to the technical field of passive sonar signals and information processing, and more particularly to the automatic tracking of the azimuth of an underwater acoustic target. Background technique [0002] The radiated noise of underwater acoustic targets, such as engine noise, underwater acoustic detection pulses, underwater acoustic communication pulses, etc., can be used by passive detection sonar arrays for target directional tracking. [0003] In the prior art, there are methods for discovering and automatically tracking targets by means of underwater acoustic target azimuth history maps. [0004] If there is an underwater acoustic source in the current azimuth direction, the amplitudes of the time-compensated array element signals will be superimposed in the same direction during the fusion process, otherwise they will be completely or partially canceled. Therefore, the energy of the synthetic beam in the direction of the targ...

AI Technical Summary

Problems solved by technology

[0010] In practical applications, the received signal of the sonar array is mixed with the noise of the ocean environment, resulting in a large amount of random image noise on the azimuth history map of the underwater acoustic target

When the automatic underwater acoustic target azimuth tracking technology is disturbed by image noise, there is a certain probability that the azimuth corresponding to the noise peak will be misjudged as the target azimuth, which will cause the tracking result to deviate.

However, the noise processing methods in the prior art are all based on the processing method after obtaining the entire acoustic map, which cannot be applied to real-time tracking of underwater acoustic targets.

The noise elimination in this acoustic tracking process is very different from the conventional noise elimination. At present, there is no suitable technology that can effectively prevent the deviation of the tracking results caused by noise.

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