基于微多普勒效应的运动船舶目标分类研究

Research on moving ship target classification based on micro-doppler effect

基于雷达的舰船目标识别技术具有重要的应用,包括海上交通的管理与监控、舰船运动目标的识别、敌方舰船侦察等,在雷达系统的运行过程中,地面杂波信号、气象杂波信号等干扰信号会降低雷达系统的精度,导致水面舰船目标识别出现误差等问题。微多普勒效应是指激光雷达发生二次散射时,运动目标产生位移时目标的雷达回波频率会发生改变,利用微多普勒效应可以显著提高雷达系统的精度,提高海上舰船目标的识别与分类水平。本文首先介绍了微多普勒效应的原理,然后对水面监控雷达系统进行详细研究,最后开发了基于微多普勒效应的海上运动船舶目标识别与分类系统。

Radar-based ship target recognition technology has important applications,including maritime traffic management and monitoring,ship moving target recognition,enemy ship reconnaissance,etc.During the operation of radar system,ground clutter signal,meteorological clutter signal and other interference signals will reduce the accuracy of radar system,resulting in errors in surface ship target recognition and other issues.Micro-Doppler effect refers to the change of radar echo frequency when the moving target displaces when the second scattering occurs.Using micro-Doppler effect can significantly improve the accuracy of radar system and improve the recognition and classification level of ship targets at sea.Firstly,the principle of micro-Doppler effect is introduced,and then the surface surveillance radar system is studied in detail.Finally,a ship target recognition and classification system based on micro-Doppler effect is developed.