基于频域特征的水下高速目标瞬态信号检测  

Underwater high speed target transient signal detection based on frequency characteristic

作　　者：王顺杰[1] 刘启军[1] 戴卫国[1] 

机构地区：[1]海军潜艇学院,山东青岛266044

出　　处：《舰船科学技术》2013年第4期91-93,97,共4页Ship Science and Technology

摘　　要：水下高速目标出管瞬态信号低频特征明显。介绍了Power-Law瞬态信号检测器,针对水下高速目标的出管噪声特点,提出了基于频域特征的瞬态信号检测方法。若中高频部分能量变化明显,直接判断为非水下高速目标。利用该方法对鲸鱼的鸣叫声和实测某水下高速目标出管噪声进行了信号检测,结果表明该方法可有效对水下高速目标出管噪声进行检测,并在一定程度上降低了虚警概率。The exceed tube transient signal of underwater high speed target has obvious characteristic in low frequency. Firstly,Power-Law transient signal detector was introduced, a method based on frequency field characteristic to detect transient signal was proposed. It can judge that the target is not a underwater high speed target directly if the energy of medium-high frequency changes obviously. Then the method was used to detect cetacean tweet noise and real-measured underwater high speed target exceed tube noise, the result shows that using the method can detect underwater high speed target exceed tube noise effectively and reduce false alarm probability in a certain extent.

关 键 词：频域特征 水下高速目标 瞬态信号 检测 

分 类 号：O427.5[理学—声学]