Research on suppression for tow-ship interference

Abstract

Towing line array underwater detection equipment detection performance will be tug of radiation noise interference, in order to enhance the performance of sonar detection, the key from the array spacing and follow-up signal processing to proceed. The purpose of using the towing array underwater probing device is to target the tail of the tug, but in actual use the towed array of half-wave lengths is affected by the strong tug noise The detection performance of the ship's tail direction is greatly restricted, and it is imperative to improve it. Otherwise, it will not be able to detect the threat target from the wake of the wake, and the target can not be found in time. This paper focuses on the reception directivity of the quarter-wave spacing matrix under the single-frequency signal and the wideband signal. By comparing the results of the two directional simulations, it is known that, unlike the half-wavelength interval matrix, the end-to-receive directionality of the quarter-wave spacing matrix is asymmetric, which can significantly suppress the interference in the direction of the drag Detection performance. The tandem noise can be suppressed by the combination of the received signal and the zeroing of the tampon, and the quarter-wave spacing matrix formed by the permutation-weighted combination array can further suppress the tug noise.