An Accelerating Target Detection Algorithm Based on DPT and Fractional Fourier Transform

PANG Cun-suo

doi:10.3969/j.issn.0372-2112.2012.01.030

您当前的位置：

首页 >

文章列表页 >

An Accelerating Target Detection Algorithm Based on DPT and Fractional Fourier Transform

更新时间：2025-07-16

- An Accelerating Target Detection Algorithm Based on DPT and Fractional Fourier Transform
- Acta Electronica Sinica Vol. 40, Issue 1, Pages: 184-188(2012)
- 作者机构：
  
  1. 北京理工大学电子工程系,北京,100081
  2. 中北大学信息工程学院,山西,太原,030051
  3. 北京理工大学电子工程系北京,100081
  4. 中北大学信息工程学院山西太原,030051
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0372-2112.2012.01.030
  CLC： TN911.72
- Published：2012
- 稿件说明：
移动端阅览
PANG Cun-suo. An Accelerating Target Detection Algorithm Based on DPT and Fractional Fourier Transform[J]. Acta Electronica Sinica, 2012, 40(1): 184-188.
DOI：

PANG Cun-suo. An Accelerating Target Detection Algorithm Based on DPT and Fractional Fourier Transform[J]. Acta Electronica Sinica, 2012, 40(1): 184-188. DOI： 10.3969/j.issn.0372-2112.2012.01.030.

摘要

本文提出了一种离散多项式相位变换(DPT)和分数阶傅里叶变换(FRFT)相结合的LFM检测方法.首先

分析了经典DPT算法中调频分辨率与互相关时延、积累脉冲长度以及积累性能之间的相互关系

指出时延较小的DPT算法与经典DPT算法相比

检测性能提高约3dB

但调频率估计误差大.其次

针对这一问题

提出在DPT基础上

利用FRFT进一步提高调频率估计精度

当输入信噪比大于-11dB时

在分数阶域引入一维牛顿迭代法可提高运算速度;最后

给出了算法复杂度和估计误差的理论分析并用实验结果验证了算法的有效性.

Abstract

The echo of accelerating targets can be approximated as a linear frequency modulated signal which may degrades the MTD's coherent integration performance.This paper presents an LFM detection method based on both discrete polynomial phase transform (DPT) and the fractional Fourier transform (FRFT).First

the interrelation between frequency resolution

cross-correlation delay

pulse length and integration performance of the classic DPT algorithm are analyzed.The result shows that detection performance of the DPT algorithm with a small time delay can be improved 3dB than classical algorithm.This is helpful to detect accelerating target under low SNR

but causes large parameter estimation error.Second

based on DPT algorithm

the FRFT is applied to further improve the accuracy of chirp rate estimation.When the input signal-to-noise ratio (SNR) is greater than-11 dB

one-dimensional Newton's iteration method can help to improve the operation speed in the fractional domain.Finally

the algorithm complexity and the theory of estimation error are presented

and the validity of proposed algorithm is verified by simulation results which make the theory perfect.

关键词

Keywords

references

Views

1388

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Study on DPCA-FrFT Based Multi-Channel SAR-GMTI

Related Author

LIU An-na

CHEN Li

ZHAO Fei

KUANG Gang-yao

Related Institution

College of Electronic Science and Engineering,National University of Defense Technology

Beijing Institute of Tracking and Telecommunication Technology

College of Electronic Science and EngineeringNational University of Defense TechnologyChangshaHunan 410073China

Beijing Institute of Tracking and Telecommunication TechnologyBeijing 100094China

⁰