Small opening cascade synchronous scanning underwater laser fuze using an adaptive backscatter filtering method

Abstract

To alleviate the problem of the low spatial utilization rate of underwater single-beam rotating scanning laser fuzes, a multi-beam rotating scanning fuze structure is proposed in this paper. It was used as a platform to study the interference mechanism of underwater pulsed laser backscatter, and Monte Carlo simulations were performed for typical detection situations of the underwater laser fuze. It was found that the interference echoes resulting from backscatter could even drown the actual target echoes and cause severe interference to the target identification of the fuze. To this end, this paper proposes an adaptive filtering algorithm called “VSS-DLMS” suitable for the fuze FPGA platform and simulated using echo data obtained by a real detection environment. The simulation results demonstrate that the algorithm can effectively suppress the backscattered signal of the pulsed laser in seawater and improve the signal-to-noise ratio of fuze detection.