多途信道中声屏蔽及声聚焦

针对传统阵处理无法分辨同一方向上2个点源的缺陷,提出了多途信道中声屏蔽技术.将声屏蔽技术应用于抗拖船干扰,把拖曳线列阵接收的拖船干扰和同方向的目标信号在频域通过一个屏蔽、聚焦权滤波器,在对干扰屏蔽的同时,对目标聚焦.仿真结果表明,干扰源的辐射噪声被显著抑制,而所期望的目标信号清晰可见,其输出相干信噪比大幅度提高,该技术在抑制拖船干扰的同时可以有效消除在该方向的探测盲区.

Acoustic shielding and acoustic focusing

An acoustic shielding technology for multi-path channels was developed to meet the challenge of distinguishing between two targets at the same bearing.This is impossible with traditional technologies used for hydrophone array processing.Tow-vessel noise suppressing via this acoustic shielding technology was simulated.The signals were received by every element,and so contained the noise of the tow-vessel and the signal transmitted by the target at the same bearing.They were weighted in the frequency domain a...