Micro-Doppler Extraction of Vibrating Target Based on ATI Technique and Radon Transform in SAR

ZHANG Wei; TONG Chuang-ming; ZHANG Qun

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Micro-Doppler Extraction of Vibrating Target Based on ATI Technique and Radon Transform in SAR

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- Micro-Doppler Extraction of Vibrating Target Based on ATI Technique and Radon Transform in SAR
- Acta Electronica Sinica Vol. 39, Issue 10, Pages: 2431-2436(2011)
- 作者机构：
  
  1. 空军工程大学导弹学院,陕西三原,713800
  2. 空军工程大学电讯工程学院,陕西,西安,710077
  3. 毫米波国家重点实验室,江苏,南京,210096
  4. 空军工程大学导弹学院陕西三原,713800
  5. 空军工程大学电讯工程学院陕西西安,710077
  6. 毫米波国家重点实验室江苏南京,210096
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN957
- Published：2011
- 稿件说明：
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ZHANG Wei, TONG Chuang-ming, ZHANG Qun. Micro-Doppler Extraction of Vibrating Target Based on ATI Technique and Radon Transform in SAR[J]. Acta Electronica Sinica, 2011, 39(10): 2431-2436.
DOI：

ZHANG Wei, TONG Chuang-ming, ZHANG Qun. Micro-Doppler Extraction of Vibrating Target Based on ATI Technique and Radon Transform in SAR[J]. Acta Electronica Sinica, 2011, 39(10): 2431-2436. DOI：

摘要

针对地杂波背景下地面振动目标的时变微多普勒特征提取问题

提出了一种基于距离向压缩数据域双通道ATI干涉和Radon变换的提取方法.ATI相位对消用于抑制地杂波

获取振动目标的干涉信号

其在距离向压缩数据域呈现为沿方位向的直线;Radon变换则用于检测这些微弱直线分量

并确定它们所在的距离单元.详细推导了目标沿不同方向振动引入的微多普勒参数化表达式.与单通道模式相比

该方法无需补偿雷达平动引起的多普勒频移

且可有效检测沿方位向振动的目标

其微多普勒谱的显著特征是呈非周期性变化.数值仿真验证了该方法的正确性和有效性.

Abstract

Aiming at extracting the time-varying micro-Doppler feature of the vibrating target in ground clutter environment

the method of micro-Doppler extraction based on dual-channel ATI technique and Radon transform is presented.The ATI technique is utilized to suppress ground clutter and obtain the interferometric signal of the vibrating target

which is presented as a straight line along the azimuth direction in the range-compressed data domain.The Radon transform is utilized to detect the weak straight line and find out which range cell it locates at.And the mathematical expressions of micro-Doppler with different vibrating directions are derived and discussed in detail.Compared with the single-channel situation

it is no need to compensate for the Doppler shift caused by the radar's translation

and the target vibrating along the azimuth direction could be effectively detected

whose micro-Doppler presents remarkably nonperiodic feature.Simulated results verify the accuracy and availability of the proposed method.

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