Underwater four-quadrant dual-beam circumferential scanning laser fuze using nonlinear adaptive backscatter filter based on pauseable SAF-LMS algorithm  

作　　者：Guangbo Xu Bingting Zha Hailu Yuan Zhen Zheng He Zhang 

机构地区：[1]Ministerial Key Laboratory of ZNDY,Nanjing University of Science and Technology,Nanjing 210094,China [2]Science and Technology on Electromechanical Dynamic Control Laboratory,Beijing 100081,China [3]Shanghai Radio Equipment Research Institute,Shanghai 201109,China

出　　处：《Defence Technology（防务技术）》2024年第7期1-13,共13页Defence Technology

基　　金：supported by the 2021 Open Project Fund of Science and Technology on Electromechanical Dynamic Control Laboratory,grant number 212-C-J-F-QT-2022-0020;China Postdoctoral Science Foundation,grant number 2021M701713;Postgraduate Research&Practice Innovation Program of Jiangsu Province,grant number KYCX23_0511;the Jiangsu Funding Program for Excellent Postdoctoral Talent,grant number 20220ZB245。

摘　　要：The phenomenon of a target echo peak overlapping with the backscattered echo peak significantly undermines the detection range and precision of underwater laser fuzes.To overcome this issue,we propose a four-quadrant dual-beam circumferential scanning laser fuze to distinguish various interference signals and provide more real-time data for the backscatter filtering algorithm.This enhances the algorithm loading capability of the fuze.In order to address the problem of insufficient filtering capacity in existing linear backscatter filtering algorithms,we develop a nonlinear backscattering adaptive filter based on the spline adaptive filter least mean square(SAF-LMS)algorithm.We also designed an algorithm pause module to retain the original trend of the target echo peak,improving the time discrimination accuracy and anti-interference capability of the fuze.Finally,experiments are conducted with varying signal-to-noise ratios of the original underwater target echo signals.The experimental results show that the average signal-to-noise ratio before and after filtering can be improved by more than31 d B,with an increase of up to 76%in extreme detection distance.

关 键 词：Laser fuze Underwater laser detection Backscatter adaptive filter Spline least mean square algorithm Nonlinear filtering algorithm 

分 类 号：TJ439.2[兵器科学与技术—火炮、自动武器与弹药工程]