基于keystone变换的宽带目标识别雷达杂波抑制

Journal of Systems Engineering and Electronics ›› 2009, Vol. 31 ›› Issue (1): 49-53.

基于keystone变换的宽带目标识别雷达杂波抑制

侯庆禹, 刘宏伟, 保铮

西安电子科技大学雷达信号处理国家重点实验室, 陕西, 西安, 710071

收稿日期:2007-11-06 修回日期:2008-06-05 出版日期:2009-01-20 发布日期:2010-01-03
作者简介:侯庆禹(1981- ),男,博士研究生,主要研究方向为雷达目标识别和雷达信号处理.E-mail:qyhou1981@163.com
基金资助:
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

Clutter suppression of wideband target recognition radars based on keystone transformation

HOU Qing-yu, LIU Hong-wei, BAO Zheng

National Lab. of Radar Signal Processing, Xidian Univ., Xi’an 710071, China

Received:2007-11-06 Revised:2008-06-05 Online:2009-01-20 Published:2010-01-03

摘要/Abstract

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。

Abstract: 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 suppression 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.

中图分类号:

TN959.1

侯庆禹, 刘宏伟, 保铮. 基于keystone变换的宽带目标识别雷达杂波抑制[J]. Journal of Systems Engineering and Electronics, 2009, 31(1): 49-53.

HOU Qing-yu, LIU Hong-wei, BAO Zheng. Clutter suppression of wideband target recognition radars based on keystone transformation[J]. Journal of Systems Engineering and Electronics, 2009, 31(1): 49-53.

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