双通道SAR地面振动目标特征提取方法

doi:10.3969/j.issn.1001-2400.2016.03.020

西安电子科技大学学报 ›› 2016, Vol. 43 ›› Issue (3): 114-119.doi: 10.3969/j.issn.1001-2400.2016.03.020

双通道SAR地面振动目标特征提取方法

梁颖1,3;张群1,2;杨秋1;顾福飞1

(1. 空军工程大学信息与导航学院, 陕西西安 710077;
2. 信息感知技术协同创新中心，陕西西安 710077;
3. 中国人民解放军95980部队，湖北襄阳 441100)

收稿日期:2015-01-26 出版日期:2016-06-20 发布日期:2016-07-16
通讯作者: 梁颖
作者简介:梁颖(1986-)，男，空军工程大学博士研究生，E-mail：liangying8633@163.com．
基金资助:
国家自然科学基金资助项目(61172169，61471386)；陕西省自然科学基础研究计划资助项目(2015JM6306)

Features extracting method of ground vibrating targets for dual-channel SAR

LIANG Ying1,3;ZHANG Qun1,2;YANG Qiu1;GU Fufei1

(1. School of Information and Navigation, AFEU, Xi'an 710077, China;
2. Collaborative Innovation Center of Information Sensing and Understanding, Xi'an 710077, China;
3. Unit 95980 of PLA, Xiangyang 441100, China)

Received:2015-01-26 Online:2016-06-20 Published:2016-07-16
Contact: LIANG Ying

摘要/Abstract

摘要：

合成孔径雷达在对地面振动目标检测与特征提取时，回波信号中不可避免地存在大量的杂波，给地面振动目标的检测与特征提取带来困难．为有效抑制地杂波，进而实现地面振动目标检测与特征提取，笔者采用相位中心偏置天线技术进行杂波抑制．分析表明，经相位中心偏置天线对消后振动目标回波信号中存在一个随慢时间变化的包络项，称为慢时间包络，该项将影响振动目标微多普勒时频曲线的能量分布，导致无法获取完整的振动目标微多普勒时频曲线；进一步地，根据慢时间包络特征实现了振动目标的特征提取．最后，仿真实验验证了理论分析结果及振动目标特征提取方法的有效性．

关键词: 振动目标, 杂波抑制, 相位中心偏置天线, 慢时间包络

Abstract:

The returned radar signal includes the vibrating target echo but also the strong ground clutter. However, it is difficult to detect and extract the vibrating features for SAR. For detecting and extracting the features of vibrating targets on the ground, the displaced phase center antenna (DPCA) technique is applied to suppress the ground clutter, which indicates that a time-varying envelope is induced after the DPCA processing, named the slow time envelope (STE). The energy distribution of micro-Doppler (m-D) time-frequency curve is influenced by the STE, and the integrated m-D time-frequency curve cannot be obtained. Further, an extracting method of vibrating features based on STE signatures is proposed. Finally some simulations are given for validating the theoretical derivation and the effectiveness of the proposed extracting method.

Key words: vibrating target, clutter suppression, displaced phase center antenna, slow time envelope

梁颖;张群;杨秋;顾福飞. 双通道SAR地面振动目标特征提取方法[J]. 西安电子科技大学学报, 2016, 43(3): 114-119.

LIANG Ying;ZHANG Qun;YANG Qiu;GU Fufei. Features extracting method of ground vibrating targets for dual-channel SAR[J]. Journal of Xidian University, 2016, 43(3): 114-119.

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双通道SAR地面振动目标特征提取方法

Features extracting method of ground vibrating targets for dual-channel SAR

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