Matched Field Noise Suppression based on Matrix Filter

The tow-ship noise suppression is of the key of towed line array sonar system. Referencing to the novel concept matched field noise suppression (MFNS), the matched field noise suppression based on matrix filter, called MF-CBF in this paper, is proposed to suppress the tow-ship noise. The response of MF- CBF to tow-ship noise is set to be zero and unit to signal direction vector. The optimal matrix filter is computed with second order cone (SOC) constraints algorithm. In the simulation results, it is shown that the performance of MF-CBF has been great improved with matrix filter compared with CBF. The tow-ship noise is suppressed and signal power is kept. This is consonant with the theoretical analysis. Also the robustness of the MF-CBF was analyzed. The performance of the method has a slight degradation with noise replica vector mismatch.