Target Detection Within Sea Clutter Based on Multi-Scale Hurst Exponent in FRFT Domain

LIU Ning-bo; GUAN Jian; WANG Guo-qing; CHEN Xiao-long; HE You

doi:10.3969/j.issn.0372-2112.2013.09.029

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Target Detection Within Sea Clutter Based on Multi-Scale Hurst Exponent in FRFT Domain

更新时间：2025-07-16

- Target Detection Within Sea Clutter Based on Multi-Scale Hurst Exponent in FRFT Domain
- Acta Electronica Sinica Vol. 41, Issue 9, Pages: 1847-1853(2013)
- 作者机构：
  
  海军航空工程学院电子信息工程系,山东,烟台,264001
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China (No.61179017, No.61201445);Taishan Scholars Special Funding for Construction Projects;Aeronautical Science Foundation of China, ASFC (No.20095184004)
- DOI：10.3969/j.issn.0372-2112.2013.09.029
  CLC： TN957
- Published：2013
- 稿件说明：
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LIU Ning-bo, GUAN Jian, WANG Guo-qing, et al. Target Detection Within Sea Clutter Based on Multi-Scale Hurst Exponent in FRFT Domain[J]. Acta Electronica Sinica, 2013, 41(9): 1847-1853.
DOI：

LIU Ning-bo, GUAN Jian, WANG Guo-qing, et al. Target Detection Within Sea Clutter Based on Multi-Scale Hurst Exponent in FRFT Domain[J]. Acta Electronica Sinica, 2013, 41(9): 1847-1853. DOI： 10.3969/j.issn.0372-2112.2013.09.029.

摘要

本文主要研究海杂波分数阶Fourier变换(FRFT)谱的扩展自相似特性及FRFT域多尺度Hurst指数在海杂波目标检测中的应用.鉴于扩展自相似过程的描述参数——多尺度Hurst指数可以描述分形信号在各尺度下的细节信息

本文基于实测雷达数据研究海杂波FRFT谱的扩展自相似性以及影响参数

并利用最优FRFT域尺度下多尺度Hurst指数对目标较敏感的特点设计海杂波中目标的恒虚警检测方法.经实测数据验证

海杂波FRFT谱的多尺度Hurst指数比时域单一Hurst指数、时域多尺度Hurst指数具有更好的海杂波与目标区分能力

并且由于FRFT可以很好地积累匀加速类目标回波的能量

有效提升信杂比

因此该检测方法具有检测海杂波中微弱运动目标的潜力.

Abstract

This paper mainly studies the extended self-similarity of the fractional Fourier transform (FRFT) spectrum of sea clutter and the application of the multi-scale Hurst exponent in FRFT domain to target detection within sea clutter.Considering that the parameter of the extended self-similar process—the multi-scale Hurst exponent can characterize the details of fractal signals in each scale

this paper studies the extended self-similarity of real sea clutter FRFT spectrum and its influencing factors based on real radar data.Then

the characteristic that the multi-scale Hurst exponent in the optimal FRFT-domain scale is relatively sensitive to the target is utilized for designing CFAR detection method within sea clutter.By the verification of real data

the multi-scale Hurst exponent in FRFT domain performs better in separating target from sea clutter than the mono-Hurst exponent and the multi-scale Hurst exponent in time domain.Additionally

because FRFT can effectively accumulate the energy of accelerating target echoes and promote the signal-to-clutter ratio

the proposed detection method has the potential for weak moving target detection within sea clutter.

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