一种激光尾流制导鱼雷信号检测方法

针对鱼雷光检测尾流时尾流信号受水体后向散射干扰不易检测的问题,给出了一种有效的检测方法。利用变遗忘因子的自适应抵消方法对水体后向散射回波进行抑制,通过非线性放大增强目标信号,最后采取自适应阈值等多种有效策略对目标进行探测。对试验数据分析表明,该方法可以有效抑制水体后向散射回波信号,并具有较快的收敛速度和跟踪速度,可提高光尾流检测能力。研究结果可为光检测尾流的实际应用提供了依据。

A Signal Detection Method for Ship Laser Wake Homing Torpedo

In torpedo′s detecting underwater target with laser,the backscattering echo is much stronger than the useful tar-get-reflected signal,which makes signal detection and processing very difficult.Therefore,we present an effective laser wake detection method,in which a new adaptive interference canceling method is employed via recursive least square（RLS）algorithm to eliminate the backscattering echo,and to detect the target signal complex by using dynamic adaptive threshold and other strategies.Experimental result illustrates that the water backscattering echo can be effective eliminated and the target signal can be extracted with the present method with higher convergence and tracing velocities.A laser wake homing torpedo can make use of this method to detect ship laser wake.