船载地波雷达地杂波和船只目标回波分离方法OA北大核心CSCDCSTPCD

Shipborne high-frequency surface-wave radar(HFSWR)has emerged as an effective tool for detecting vessel targets over wide ranges and long distances due to the mobility and flexibility of the shipborne platform.However,the motion of the shipborne platform generates ground clutter(including land clutter and island clutter),producing an additional Doppler shift.This results in a large area of clutter within the range-Doppler echo spectrum,which interferes with vessel target echoes and considerably affects target detection.This article proposes a method to address the challenge of separating vessel target echoes from ground clutter in a shipborne HFSWR platform.The proposed method first estimates and extracts land clutter by combining geographic and attitude information of the shipborne platform.It then separates vessel target echoes from island clutter by leveraging differences in Doppler shifts and echo amplitude characteristics.Finally,the method estimates the azimuth and geographical locations of stationary targets(including stationary vessels and islands)based on the relationship between their azimuths and Doppler shifts.The effectiveness of the proposed method is validated using data obtained by the shipborne HFSWR platform and automatic identification system data.Experimental results show that the proposed method successfully separates ground clutter from vessel target echoes.