Modified Discrete Chirp-Fourier Transform and Its Application to SAR Moving Target Detection

SUN Hong-bo; GUO Xin; GU Hong; SU Wei-min; LIU Guo-sui

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Modified Discrete Chirp-Fourier Transform and Its Application to SAR Moving Target Detection

更新时间：2025-07-16

- Modified Discrete Chirp-Fourier Transform and Its Application to SAR Moving Target Detection
- Acta Electronica Sinica Vol. 31, Issue 1, Pages: 78-81(2003)
- 作者机构：
  
  南京理工大学电子工程技术研究中心,江苏,南京,210094
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN957
- Published：2003
- 稿件说明：
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SUN Hong-bo, GUO Xin, GU Hong, et al. Modified Discrete Chirp-Fourier Transform and Its Application to SAR Moving Target Detection[J]. Acta Electronica Sinica, 2003, 31(1): 78-81.
DOI：

SUN Hong-bo, GUO Xin, GU Hong, et al. Modified Discrete Chirp-Fourier Transform and Its Application to SAR Moving Target Detection[J]. Acta Electronica Sinica, 2003, 31(1): 78-81. DOI：

摘要

离散Chirp-Fourier变换(DCFT)是最新提出的一种检测线性调频信号的有力技术

但它对信号的采样点数和信号参数有着近乎苛刻的约束条件

限制了它的工程应用.本文对DCFT的定义进行了修正

它不附带任何约束条件

是一种优越而又实用的线性调频信号检测技术.本文将其用于机载合成孔径雷达(SAR)运动目标检测当中

取得了良好的效果.此外

本文又提出了基于CLEAN思想的检测技术

与修正DCFT相结合

可以有效地检测出被强目标掩盖的弱目标

具有很大的实用价值.仿真的结果验证了算法的有效性.

Abstract

The Discrete Chirp-Fourier Transform (DCFT) proposed recently is an effective technique for chirp signal detection.But it requires some rigorous restrictions on the signal length and parameters.These requirements restrict the application of DCFT.In this paper

the definition of DCFT is modified.No restrictions are included in this new definition.It is an excellent and practical technique for the detection of chirp signal.Then the modified DCFT is applied to airborne SAR moving target detection and good results are achieved.In addition

a new CLEAN technique combined with the modified DCFT is proposed to detect the small targets submerged by the large ones effectively.This new combination technique is valuable in practice.The simulation results prove its validity.

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Related Author

SUN Hong-bo

GU Hong

SU Wei-min

LIU Guo-sui

ZHAO Guo-wei

JIANG Jia-qing

DONG Gang-gang

FANG Cheng

Related Institution

南京理工大学电子工程技术研究中心

National Key Laboratory of Radar Signal Processing, Xidian University

College of Electronic Information and Automation， Civil Aviation University of China

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State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System， National University of Defense Technology

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