基于距离-多普勒域的电离层杂波极化抑制方法  

Method for polarization cancellation of ionospheric clutter based on range-Doppler domain

作　　者：洪泓[1] 毛兴鹏[1] 果然[1] 侯慧军[1] 邓维波[1] 

机构地区：[1]哈尔滨工业大学电子与信息工程学院,黑龙江哈尔滨150001

出　　处：《系统工程与电子技术》2014年第12期2400-2405,共6页Systems Engineering and Electronics

基　　金：国家自然科学基金(61171180)资助课题

摘　　要：斜投影极化滤波是高频地波雷达(high-frequency surface wave radar,HFSWR)抑制干扰的有效方法。分析了干扰估计误差对斜投影极化滤波器性能的影响,指出多普勒处理后的电离层杂波较处理之前具有更高的干噪比,在距离-多普勒域处理可获得更佳的估计精度和干扰抑制效果。提出一种基于距离-多普勒域的电离层杂波极化抑制方法,并使用实测数据对其处理效果进行验证。对某HFSWR实验系统实际录取的数据处理结果表明,电离层杂波干扰得到有效抑制,信干比改善可达15dB以上。Oblique proj ection polarization filtering is a valid approach to suppress interference in high-fre-quency surface wave radar （HFSWR）.The effect on the performance of oblique proj ection polarization filter by the biased estimation of the interference is analyzed.Compared with range-time domain,it benefits from higher estimation accuracy and better interference suppression performance in range-Doppler domain,due to the higher interference to noise ratio after Doppler processing.Therefore,a method for polarization cancellation of iono-spheric clutter based on range-Doppler domain is proposed in this work.Experimental result of practical dual-polarized HFSWR data demonstrates that the proposed method is effective for ionospheric clutter suppression and the signal-to-interference ratio can be increased by more than 15 dB.

关 键 词：距离-多普勒域 电离层杂波 极化滤波 干扰抑制 高频雷达 

分 类 号：TN911.7[电子电信—通信与信息系统]