一种猎雷声呐信号被动定向技术研究

Research on Passive Acoustic Location in Mine-hunting Sonar

摘要:

介绍了一种猎雷声呐脉冲信号被动定位的测向方法。反猎水雷采用被动声自导方式，利用猎雷声呐发射的窄带脉冲信号，采用自适应 notch 滤波器估计信号的包络、频率、相位差。采用时延差粗测与相位差精测相结合的方法实现时延估计。此方法不仅对 CW 脉冲信号可测向、测距，还可适用于调频、跳频信号。 该方法已通过仿真及实测数据验证有效。

Abstract:

This paper introduces a method of passive acoustic location for minehunting sonar. The anti-hunting mine adopts passive acoustic homing.，The adaptive notch filter is used to estimate the envelope，frequency，and phase difference of the narrowband pulse signal emitted by minehunting sonar. Time delay is estimated through coarse measurement of delay inequality and fine measurement of phase difference. The means above is feasible not only to CW pulses，but also to frequency modulated and frequency hopping signal. Simulation results and sea trials show this method is valid and viable.