Vector broadside array robust beam forming method

Abstract

The invention provides a vector broadside array robust beam forming method, and aims to solve the problem that sonar self-noise affects the detection performance of a broadside array system, based on a vector sonar array signal processing mode, an airspace matrix filter is designed to suppress near-field strong interference such as mechanical noise and propeller noise. And stream noise, marine environment noise and residual non-correlation noise in other detection sectors are filtered by using diagonal load reduction operation, and finally, azimuth estimation is performed on a far-field target by using a robust beam forming algorithm. According to the method, self-noise components can be effectively filtered out to the maximum extent, the output signal-to-noise ratio and robustness are enhanced, and then the anti-noise capability, the spatial resolution and the azimuth estimation performance of the system are improved.

Description

technical field [0001] The invention relates to a vector broadside array robust beam forming method, which belongs to the field of sonar array signal processing. Background technique [0002] The side array sonar is two long line arrays fixedly installed on both sides of the ship and arranged longitudinally along the hull. Compared with the bow sonar, the side array array has a larger aperture, lower operating frequency, and longer detection distance. Unlike the towed array sonar that is towed behind the boat, the side array has no effect on the maneuverability of the submarine, and there is no formation distortion. Problems with spatial duality. Therefore, on the basis of the ship's concealment and maneuverability advantages, the broadside array also has superior long-distance passive detection capabilities. However, with the development of vibration and noise reduction technology, the difficulty of underwater target detection is increasing, which puts forward higher requ...

AI Technical Summary

Problems solved by technology

[0008] The present invention proposes a vector broadside array robust beamforming scheme: Aiming at the problem that sonar self-noise affects the detection performance of the broadside array system, based on the signal processing mode of the vector sonar array, an airspace matrix filter is designed to suppress near fields such as mechanical noise and propeller noise For strong interference, use diagonal load shedding to filter out flow noise, ocean environment noise and other residual non-correlated noise in the detection sector, and finally use a robust beamforming algorithm to estimate the azimuth of the far-field target

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