双基地声呐接收站散射波低截获技术

发布时间：2018-01-02 14:03

本文关键词：双基地声呐接收站散射波低截获技术　出处：《声学技术》2017年05期 　论文类型：期刊论文

【摘要】：双基地声呐的接收站因散射主动信号存在暴露的风险,对此提出了基于发射声屏蔽的双基地声呐低截获技术。发射站采用垂直发射阵,利用屏蔽权对原始信号进行预处理,获得的低截获信号在接收站处被自动抵消,从而降低接收站散射信号的能量。仿真结果表明,发射声屏蔽技术能有效增加接收站散射信号到达目标处的能量衰减,而对到达接收站处的待测目标散射信号则无较大影响。该方法突破了以往低截获技术只是改变信号能量时频域分布的局限(在信号处理层面),利用多途结构真实降低了被截获信号能量(在物理层面),并适用于多种信号形式。
[Abstract]:A dual - base sonar low - capture technique based on the emission - acoustic shielding is proposed for the receiving station of a dual - base sonar . The transmitting station adopts a vertical transmission matrix to pre - process the original signal by using the shielding power . The simulation results show that the emission acoustic shielding technology can effectively increase the energy attenuation at the receiving station and reduce the energy of the target scattered signal at the receiving station . The simulation results show that the transmission acoustic shielding technology can effectively increase the energy attenuation of the scattering signal at the receiving station ( at the signal processing level ) , and the trapped signal energy ( at the physical level ) is reduced by using the multi - distance structure , and the method is suitable for various signal forms .

【作者单位】：哈尔滨工程大学水声技术重点实验室;哈尔滨工程大学水声工程学院;
【基金】：国家自然科学基金资助项目(51509059)
【分类号】：TB56
【正文快照】： 低截获技术兴起于雷达领域,低截获雷达[1]早已进入装备服役,目前正向低截获组网雷达方向发展[2]。声呐探测受限于复杂的水声信道环境,检测目标尚有困难[3],对低截获技术的需求与关注也就不足,低截获声呐研究进展也较为缓慢。水声学领域中低截获技术公开发表的文献相对较少,除

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