摘要
对宽带雷达,相邻回波间会出现越距离单元走动现象,传统杂波抑制方法不适用。keystone变换在校正越距离单元走动时,无法同时校正模糊次数不等的多个目标。基于上述思想,提出了一种结合keystone变换在频率域-多普勒域联合提取目标信号和抑制杂波的适合于宽带目标识别雷达的杂波抑制新方法。该方法较好地解决了当keystone变换过程中目标和杂波出现不同的模糊因子时,如何校正越距离单元走动的这一难题。计算机仿真结果表明,该方法在低信杂比情况下仍可保持较好的识别性能。
Traditional clutter suppression is inapplicable to the wideband radar as the migration through range cells (MTRCs) occurs between coherent echoes. The keystone formatting algorithm could mitigate the MTRCs, but it is useless when the ambiguity factors of targets are different. A novel method of clutter suppres sion suitable for wideband target recognition radar is proposed, which integrates with the keystone transformation and extracts the information of target and rejected clutter in the domain of frequence-Doppler. This novel method solves the difficult problem of how to mitigate the MTRCs when the ambiguity factors of target and clutter are different. Experimental results on simulated data prove that the proposed method can keep the good performance of recognition despite the low input SCR.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2009年第1期49-53,共5页
Systems Engineering and Electronics
基金
教育部长江学者和创新团队支持计划基金(IRT0645)
国家自然科学基金(60772140)
国防预研项目
国防预研基金联合资助课题
关键词
雷达目标识别
杂波抑制
KEYSTONE变换
高分辨距离像
radar target recognition
clutter suppression
keystone transformation
high-resolution range profile